./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.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-ext/48_ticket_lock_low_contention_vs.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 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 20:10:22,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 20:10:22,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 20:10:22,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 20:10:22,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 20:10:22,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 20:10:22,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 20:10:22,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 20:10:22,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 20:10:22,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 20:10:22,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 20:10:22,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 20:10:22,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 20:10:22,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 20:10:22,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 20:10:22,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 20:10:22,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 20:10:22,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 20:10:22,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 20:10:22,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 20:10:22,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 20:10:22,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 20:10:22,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 20:10:22,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 20:10:22,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 20:10:22,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 20:10:22,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 20:10:22,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 20:10:22,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 20:10:22,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 20:10:22,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 20:10:22,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 20:10:22,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 20:10:22,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 20:10:22,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 20:10:22,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 20:10:22,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 20:10:22,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 20:10:22,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 20:10:22,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 20:10:22,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 20:10:22,549 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 20:10:22,584 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 20:10:22,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 20:10:22,586 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 20:10:22,586 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 20:10:22,587 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 20:10:22,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 20:10:22,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 20:10:22,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 20:10:22,588 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 20:10:22,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 20:10:22,589 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 20:10:22,590 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 20:10:22,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 20:10:22,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 20:10:22,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 20:10:22,590 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 20:10:22,591 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 20:10:22,591 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 20:10:22,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 20:10:22,591 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 20:10:22,591 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 20:10:22,591 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 20:10:22,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 20:10:22,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 20:10:22,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 20:10:22,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 20:10:22,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 20:10:22,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 20:10:22,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 20:10:22,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 20:10:22,593 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 20:10:22,593 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 20:10:22,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 20:10:22,594 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 20:10:22,594 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 20:10:22,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 20:10:22,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 20:10:22,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 20:10:22,894 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 20:10:22,895 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 20:10:22,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-08-29 20:10:23,993 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 20:10:24,300 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 20:10:24,300 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-08-29 20:10:24,326 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91e2aa8a6/7e2a96343f3e4cfda716869660d5e2da/FLAGe928a8c1e [2023-08-29 20:10:24,342 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91e2aa8a6/7e2a96343f3e4cfda716869660d5e2da [2023-08-29 20:10:24,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 20:10:24,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 20:10:24,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 20:10:24,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 20:10:24,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 20:10:24,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:10:24" (1/1) ... [2023-08-29 20:10:24,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67484693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:24, skipping insertion in model container [2023-08-29 20:10:24,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:10:24" (1/1) ... [2023-08-29 20:10:24,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 20:10:24,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 20:10:24,579 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 20:10:24,693 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-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2023-08-29 20:10:24,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 20:10:24,710 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 20:10:24,734 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 20:10:24,758 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-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2023-08-29 20:10:24,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 20:10:24,837 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:10:24,837 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:10:24,837 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:10:24,843 INFO L208 MainTranslator]: Completed translation [2023-08-29 20:10:24,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:24 WrapperNode [2023-08-29 20:10:24,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 20:10:24,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 20:10:24,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 20:10:24,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 20:10:24,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:24" (1/1) ... [2023-08-29 20:10:24,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:24" (1/1) ... [2023-08-29 20:10:24,887 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 109 [2023-08-29 20:10:24,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 20:10:24,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 20:10:24,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 20:10:24,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 20:10:24,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:24" (1/1) ... [2023-08-29 20:10:24,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:24" (1/1) ... [2023-08-29 20:10:24,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:24" (1/1) ... [2023-08-29 20:10:24,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:24" (1/1) ... [2023-08-29 20:10:24,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:24" (1/1) ... [2023-08-29 20:10:24,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:24" (1/1) ... [2023-08-29 20:10:24,914 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:24" (1/1) ... [2023-08-29 20:10:24,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:24" (1/1) ... [2023-08-29 20:10:24,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 20:10:24,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 20:10:24,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 20:10:24,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 20:10:24,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:24" (1/1) ... [2023-08-29 20:10:24,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 20:10:24,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 20:10:24,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 20:10:24,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 20:10:24,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 20:10:24,985 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-29 20:10:24,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-29 20:10:24,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 20:10:24,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 20:10:24,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 20:10:24,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 20:10:24,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 20:10:24,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 20:10:24,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 20:10:24,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 20:10:24,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 20:10:24,989 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 20:10:25,103 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 20:10:25,105 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 20:10:25,352 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 20:10:25,502 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 20:10:25,505 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 20:10:25,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:10:25 BoogieIcfgContainer [2023-08-29 20:10:25,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 20:10:25,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 20:10:25,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 20:10:25,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 20:10:25,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 08:10:24" (1/3) ... [2023-08-29 20:10:25,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a39b9e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 08:10:25, skipping insertion in model container [2023-08-29 20:10:25,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:24" (2/3) ... [2023-08-29 20:10:25,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a39b9e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 08:10:25, skipping insertion in model container [2023-08-29 20:10:25,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:10:25" (3/3) ... [2023-08-29 20:10:25,515 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2023-08-29 20:10:25,530 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 20:10:25,530 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-29 20:10:25,531 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 20:10:25,592 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:10:25,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 84 transitions, 173 flow [2023-08-29 20:10:25,691 INFO L130 PetriNetUnfolder]: 8/129 cut-off events. [2023-08-29 20:10:25,692 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:10:25,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 129 events. 8/129 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 311 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-08-29 20:10:25,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 84 transitions, 173 flow [2023-08-29 20:10:25,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 84 transitions, 173 flow [2023-08-29 20:10:25,705 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:10:25,719 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 84 transitions, 173 flow [2023-08-29 20:10:25,722 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 84 transitions, 173 flow [2023-08-29 20:10:25,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 84 transitions, 173 flow [2023-08-29 20:10:25,770 INFO L130 PetriNetUnfolder]: 8/129 cut-off events. [2023-08-29 20:10:25,770 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:10:25,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 129 events. 8/129 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 311 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-08-29 20:10:25,773 INFO L119 LiptonReduction]: Number of co-enabled transitions 2016 [2023-08-29 20:10:27,167 INFO L134 LiptonReduction]: Checked pairs total: 7116 [2023-08-29 20:10:27,167 INFO L136 LiptonReduction]: Total number of compositions: 55 [2023-08-29 20:10:27,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:10:27,195 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;@54ee8a46, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:10:27,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-08-29 20:10:27,197 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 20:10:27,197 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:10:27,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:27,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:10:27,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:27,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:27,205 INFO L85 PathProgramCache]: Analyzing trace with hash 12829, now seen corresponding path program 1 times [2023-08-29 20:10:27,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:27,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595969160] [2023-08-29 20:10:27,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:27,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:27,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:27,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595969160] [2023-08-29 20:10:27,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595969160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:27,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:27,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:10:27,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4415740] [2023-08-29 20:10:27,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:27,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:27,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:27,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:27,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:27,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 139 [2023-08-29 20:10:27,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:27,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:27,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 139 [2023-08-29 20:10:27,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:27,593 INFO L130 PetriNetUnfolder]: 127/356 cut-off events. [2023-08-29 20:10:27,593 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:10:27,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 356 events. 127/356 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1736 event pairs, 72 based on Foata normal form. 24/257 useless extension candidates. Maximal degree in co-relation 585. Up to 189 conditions per place. [2023-08-29 20:10:27,600 INFO L137 encePairwiseOnDemand]: 132/139 looper letters, 43 selfloop transitions, 3 changer transitions 1/60 dead transitions. [2023-08-29 20:10:27,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 60 transitions, 219 flow [2023-08-29 20:10:27,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:27,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:27,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-08-29 20:10:27,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5419664268585132 [2023-08-29 20:10:27,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-08-29 20:10:27,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-08-29 20:10:27,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:27,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-08-29 20:10:27,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:27,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:27,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:27,622 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 91 flow. Second operand 3 states and 226 transitions. [2023-08-29 20:10:27,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 60 transitions, 219 flow [2023-08-29 20:10:27,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 219 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 20:10:27,626 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 107 flow [2023-08-29 20:10:27,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-08-29 20:10:27,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-29 20:10:27,631 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 107 flow [2023-08-29 20:10:27,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:27,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:27,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:10:27,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 20:10:27,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:27,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:27,633 INFO L85 PathProgramCache]: Analyzing trace with hash 12828, now seen corresponding path program 1 times [2023-08-29 20:10:27,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:27,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473359411] [2023-08-29 20:10:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:27,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:27,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:27,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473359411] [2023-08-29 20:10:27,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473359411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:27,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:27,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:10:27,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152856843] [2023-08-29 20:10:27,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:27,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:27,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:27,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:27,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:27,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 139 [2023-08-29 20:10:27,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:27,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:27,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 139 [2023-08-29 20:10:27,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:27,873 INFO L130 PetriNetUnfolder]: 118/329 cut-off events. [2023-08-29 20:10:27,873 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-29 20:10:27,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 639 conditions, 329 events. 118/329 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1573 event pairs, 78 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 590. Up to 210 conditions per place. [2023-08-29 20:10:27,876 INFO L137 encePairwiseOnDemand]: 136/139 looper letters, 34 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-29 20:10:27,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 49 transitions, 197 flow [2023-08-29 20:10:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:27,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-29 20:10:27,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299760191846523 [2023-08-29 20:10:27,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-29 20:10:27,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-29 20:10:27,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:27,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-29 20:10:27,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:27,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:27,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:27,887 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 107 flow. Second operand 3 states and 221 transitions. [2023-08-29 20:10:27,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 49 transitions, 197 flow [2023-08-29 20:10:27,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:10:27,891 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 103 flow [2023-08-29 20:10:27,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-29 20:10:27,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-29 20:10:27,892 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 103 flow [2023-08-29 20:10:27,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:27,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:27,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 20:10:27,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 20:10:27,893 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:27,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:27,894 INFO L85 PathProgramCache]: Analyzing trace with hash 398062, now seen corresponding path program 1 times [2023-08-29 20:10:27,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:27,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951922300] [2023-08-29 20:10:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:27,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:27,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:27,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951922300] [2023-08-29 20:10:27,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951922300] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:27,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:27,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:10:27,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291879958] [2023-08-29 20:10:27,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:27,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:27,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:27,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:27,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:28,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 139 [2023-08-29 20:10:28,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:28,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 139 [2023-08-29 20:10:28,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:28,114 INFO L130 PetriNetUnfolder]: 110/317 cut-off events. [2023-08-29 20:10:28,114 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 20:10:28,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 317 events. 110/317 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1575 event pairs, 38 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 562. Up to 121 conditions per place. [2023-08-29 20:10:28,117 INFO L137 encePairwiseOnDemand]: 131/139 looper letters, 37 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2023-08-29 20:10:28,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 227 flow [2023-08-29 20:10:28,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:28,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-29 20:10:28,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299760191846523 [2023-08-29 20:10:28,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-29 20:10:28,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-29 20:10:28,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:28,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-29 20:10:28,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,122 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,122 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 103 flow. Second operand 3 states and 221 transitions. [2023-08-29 20:10:28,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 227 flow [2023-08-29 20:10:28,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 56 transitions, 223 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:10:28,125 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 155 flow [2023-08-29 20:10:28,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-29 20:10:28,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-29 20:10:28,129 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 155 flow [2023-08-29 20:10:28,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:28,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 20:10:28,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 20:10:28,131 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:28,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:28,132 INFO L85 PathProgramCache]: Analyzing trace with hash 398063, now seen corresponding path program 1 times [2023-08-29 20:10:28,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:28,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678857666] [2023-08-29 20:10:28,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:28,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:28,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:28,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678857666] [2023-08-29 20:10:28,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678857666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:28,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:28,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:10:28,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375866405] [2023-08-29 20:10:28,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:28,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:28,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:28,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:28,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:28,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 139 [2023-08-29 20:10:28,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:28,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 139 [2023-08-29 20:10:28,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:28,338 INFO L130 PetriNetUnfolder]: 101/287 cut-off events. [2023-08-29 20:10:28,338 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2023-08-29 20:10:28,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 287 events. 101/287 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1350 event pairs, 40 based on Foata normal form. 22/248 useless extension candidates. Maximal degree in co-relation 589. Up to 111 conditions per place. [2023-08-29 20:10:28,341 INFO L137 encePairwiseOnDemand]: 135/139 looper letters, 35 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-29 20:10:28,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 245 flow [2023-08-29 20:10:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-29 20:10:28,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299760191846523 [2023-08-29 20:10:28,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-29 20:10:28,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-29 20:10:28,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:28,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-29 20:10:28,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,351 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 155 flow. Second operand 3 states and 221 transitions. [2023-08-29 20:10:28,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 245 flow [2023-08-29 20:10:28,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:10:28,355 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 145 flow [2023-08-29 20:10:28,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-08-29 20:10:28,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-29 20:10:28,357 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 145 flow [2023-08-29 20:10:28,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:28,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 20:10:28,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 20:10:28,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:28,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:28,358 INFO L85 PathProgramCache]: Analyzing trace with hash 382443142, now seen corresponding path program 1 times [2023-08-29 20:10:28,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:28,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953989014] [2023-08-29 20:10:28,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:28,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:28,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:28,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953989014] [2023-08-29 20:10:28,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953989014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:28,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:28,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:10:28,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653972054] [2023-08-29 20:10:28,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:28,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:28,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:28,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:28,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:28,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 139 [2023-08-29 20:10:28,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:28,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 139 [2023-08-29 20:10:28,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:28,529 INFO L130 PetriNetUnfolder]: 109/311 cut-off events. [2023-08-29 20:10:28,529 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-08-29 20:10:28,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 311 events. 109/311 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1514 event pairs, 7 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 621. Up to 140 conditions per place. [2023-08-29 20:10:28,531 INFO L137 encePairwiseOnDemand]: 130/139 looper letters, 41 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2023-08-29 20:10:28,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 301 flow [2023-08-29 20:10:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-29 20:10:28,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539568345323741 [2023-08-29 20:10:28,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-29 20:10:28,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-29 20:10:28,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:28,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-29 20:10:28,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,535 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,536 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 145 flow. Second operand 3 states and 225 transitions. [2023-08-29 20:10:28,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 301 flow [2023-08-29 20:10:28,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 289 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:10:28,546 INFO L231 Difference]: Finished difference. Result has 45 places, 49 transitions, 207 flow [2023-08-29 20:10:28,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=207, PETRI_PLACES=45, PETRI_TRANSITIONS=49} [2023-08-29 20:10:28,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-29 20:10:28,547 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 49 transitions, 207 flow [2023-08-29 20:10:28,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:28,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 20:10:28,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 20:10:28,548 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:28,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:28,548 INFO L85 PathProgramCache]: Analyzing trace with hash 382443143, now seen corresponding path program 1 times [2023-08-29 20:10:28,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:28,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041957525] [2023-08-29 20:10:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:28,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:28,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:28,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041957525] [2023-08-29 20:10:28,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041957525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:28,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:28,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:10:28,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773685866] [2023-08-29 20:10:28,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:28,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:28,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:28,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:28,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:28,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 139 [2023-08-29 20:10:28,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 49 transitions, 207 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:28,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 139 [2023-08-29 20:10:28,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:28,687 INFO L130 PetriNetUnfolder]: 95/269 cut-off events. [2023-08-29 20:10:28,688 INFO L131 PetriNetUnfolder]: For 167/168 co-relation queries the response was YES. [2023-08-29 20:10:28,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 269 events. 95/269 cut-off events. For 167/168 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1213 event pairs, 12 based on Foata normal form. 28/261 useless extension candidates. Maximal degree in co-relation 657. Up to 152 conditions per place. [2023-08-29 20:10:28,689 INFO L137 encePairwiseOnDemand]: 135/139 looper letters, 41 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2023-08-29 20:10:28,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 327 flow [2023-08-29 20:10:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-29 20:10:28,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539568345323741 [2023-08-29 20:10:28,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-29 20:10:28,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-29 20:10:28,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:28,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-29 20:10:28,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,694 INFO L175 Difference]: Start difference. First operand has 45 places, 49 transitions, 207 flow. Second operand 3 states and 225 transitions. [2023-08-29 20:10:28,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 327 flow [2023-08-29 20:10:28,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 309 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:10:28,697 INFO L231 Difference]: Finished difference. Result has 43 places, 47 transitions, 195 flow [2023-08-29 20:10:28,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=43, PETRI_TRANSITIONS=47} [2023-08-29 20:10:28,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-29 20:10:28,700 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 47 transitions, 195 flow [2023-08-29 20:10:28,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:28,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 20:10:28,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 20:10:28,702 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:28,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:28,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1025915321, now seen corresponding path program 1 times [2023-08-29 20:10:28,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:28,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430095388] [2023-08-29 20:10:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:28,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:28,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:28,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430095388] [2023-08-29 20:10:28,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430095388] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:28,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:28,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:10:28,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515578679] [2023-08-29 20:10:28,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:28,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:28,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:28,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:28,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:28,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 139 [2023-08-29 20:10:28,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 47 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:28,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 139 [2023-08-29 20:10:28,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:28,858 INFO L130 PetriNetUnfolder]: 128/326 cut-off events. [2023-08-29 20:10:28,859 INFO L131 PetriNetUnfolder]: For 200/201 co-relation queries the response was YES. [2023-08-29 20:10:28,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 856 conditions, 326 events. 128/326 cut-off events. For 200/201 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1439 event pairs, 58 based on Foata normal form. 25/312 useless extension candidates. Maximal degree in co-relation 806. Up to 238 conditions per place. [2023-08-29 20:10:28,860 INFO L137 encePairwiseOnDemand]: 133/139 looper letters, 55 selfloop transitions, 4 changer transitions 3/68 dead transitions. [2023-08-29 20:10:28,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 68 transitions, 397 flow [2023-08-29 20:10:28,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-08-29 20:10:28,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5419664268585132 [2023-08-29 20:10:28,862 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-08-29 20:10:28,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-08-29 20:10:28,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:28,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-08-29 20:10:28,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,864 INFO L175 Difference]: Start difference. First operand has 43 places, 47 transitions, 195 flow. Second operand 3 states and 226 transitions. [2023-08-29 20:10:28,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 68 transitions, 397 flow [2023-08-29 20:10:28,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 68 transitions, 383 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:10:28,866 INFO L231 Difference]: Finished difference. Result has 45 places, 50 transitions, 217 flow [2023-08-29 20:10:28,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=45, PETRI_TRANSITIONS=50} [2023-08-29 20:10:28,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-29 20:10:28,867 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 50 transitions, 217 flow [2023-08-29 20:10:28,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:28,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:28,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:28,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 20:10:28,868 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:28,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:28,868 INFO L85 PathProgramCache]: Analyzing trace with hash -280057571, now seen corresponding path program 1 times [2023-08-29 20:10:28,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:28,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192804860] [2023-08-29 20:10:28,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:28,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:28,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:28,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192804860] [2023-08-29 20:10:28,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192804860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:28,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:28,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 20:10:28,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295410859] [2023-08-29 20:10:28,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:28,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 20:10:28,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:28,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 20:10:28,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 20:10:29,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 139 [2023-08-29 20:10:29,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 50 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 51.333333333333336) internal successors, (308), 6 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:29,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 139 [2023-08-29 20:10:29,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:29,182 INFO L130 PetriNetUnfolder]: 117/311 cut-off events. [2023-08-29 20:10:29,182 INFO L131 PetriNetUnfolder]: For 166/188 co-relation queries the response was YES. [2023-08-29 20:10:29,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 311 events. 117/311 cut-off events. For 166/188 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1402 event pairs, 18 based on Foata normal form. 13/271 useless extension candidates. Maximal degree in co-relation 815. Up to 182 conditions per place. [2023-08-29 20:10:29,184 INFO L137 encePairwiseOnDemand]: 130/139 looper letters, 41 selfloop transitions, 9 changer transitions 12/74 dead transitions. [2023-08-29 20:10:29,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 431 flow [2023-08-29 20:10:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 20:10:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 20:10:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 347 transitions. [2023-08-29 20:10:29,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41606714628297364 [2023-08-29 20:10:29,186 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 347 transitions. [2023-08-29 20:10:29,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 347 transitions. [2023-08-29 20:10:29,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:29,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 347 transitions. [2023-08-29 20:10:29,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,189 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 139.0) internal successors, (973), 7 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,189 INFO L175 Difference]: Start difference. First operand has 45 places, 50 transitions, 217 flow. Second operand 6 states and 347 transitions. [2023-08-29 20:10:29,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 431 flow [2023-08-29 20:10:29,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 423 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:10:29,191 INFO L231 Difference]: Finished difference. Result has 51 places, 55 transitions, 274 flow [2023-08-29 20:10:29,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=51, PETRI_TRANSITIONS=55} [2023-08-29 20:10:29,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2023-08-29 20:10:29,194 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 55 transitions, 274 flow [2023-08-29 20:10:29,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 51.333333333333336) internal successors, (308), 6 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:29,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:29,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 20:10:29,195 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:29,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:29,199 INFO L85 PathProgramCache]: Analyzing trace with hash -368471817, now seen corresponding path program 1 times [2023-08-29 20:10:29,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:29,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992658783] [2023-08-29 20:10:29,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:29,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 20:10:29,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:29,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992658783] [2023-08-29 20:10:29,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992658783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:29,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:29,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:10:29,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541151031] [2023-08-29 20:10:29,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:29,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 20:10:29,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:29,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 20:10:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 20:10:29,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 139 [2023-08-29 20:10:29,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 55 transitions, 274 flow. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:29,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 139 [2023-08-29 20:10:29,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:29,407 INFO L130 PetriNetUnfolder]: 87/258 cut-off events. [2023-08-29 20:10:29,407 INFO L131 PetriNetUnfolder]: For 179/189 co-relation queries the response was YES. [2023-08-29 20:10:29,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 258 events. 87/258 cut-off events. For 179/189 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1152 event pairs, 14 based on Foata normal form. 9/231 useless extension candidates. Maximal degree in co-relation 709. Up to 80 conditions per place. [2023-08-29 20:10:29,408 INFO L137 encePairwiseOnDemand]: 134/139 looper letters, 44 selfloop transitions, 9 changer transitions 1/67 dead transitions. [2023-08-29 20:10:29,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 426 flow [2023-08-29 20:10:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 20:10:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 20:10:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 260 transitions. [2023-08-29 20:10:29,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676258992805755 [2023-08-29 20:10:29,410 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 260 transitions. [2023-08-29 20:10:29,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 260 transitions. [2023-08-29 20:10:29,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:29,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 260 transitions. [2023-08-29 20:10:29,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,413 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,413 INFO L175 Difference]: Start difference. First operand has 51 places, 55 transitions, 274 flow. Second operand 4 states and 260 transitions. [2023-08-29 20:10:29,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 426 flow [2023-08-29 20:10:29,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 414 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-29 20:10:29,417 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 276 flow [2023-08-29 20:10:29,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2023-08-29 20:10:29,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2023-08-29 20:10:29,418 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 276 flow [2023-08-29 20:10:29,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:29,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:29,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 20:10:29,419 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:29,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:29,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1692634286, now seen corresponding path program 1 times [2023-08-29 20:10:29,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:29,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277135745] [2023-08-29 20:10:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:29,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 20:10:29,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:29,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277135745] [2023-08-29 20:10:29,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277135745] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:29,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:29,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 20:10:29,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623997778] [2023-08-29 20:10:29,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:29,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 20:10:29,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:29,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 20:10:29,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 20:10:29,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 139 [2023-08-29 20:10:29,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 276 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:29,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 139 [2023-08-29 20:10:29,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:29,695 INFO L130 PetriNetUnfolder]: 85/250 cut-off events. [2023-08-29 20:10:29,695 INFO L131 PetriNetUnfolder]: For 227/237 co-relation queries the response was YES. [2023-08-29 20:10:29,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 250 events. 85/250 cut-off events. For 227/237 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1101 event pairs, 11 based on Foata normal form. 8/227 useless extension candidates. Maximal degree in co-relation 687. Up to 58 conditions per place. [2023-08-29 20:10:29,697 INFO L137 encePairwiseOnDemand]: 127/139 looper letters, 39 selfloop transitions, 20 changer transitions 2/73 dead transitions. [2023-08-29 20:10:29,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 73 transitions, 472 flow [2023-08-29 20:10:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 20:10:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 20:10:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 330 transitions. [2023-08-29 20:10:29,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748201438848921 [2023-08-29 20:10:29,699 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 330 transitions. [2023-08-29 20:10:29,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 330 transitions. [2023-08-29 20:10:29,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:29,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 330 transitions. [2023-08-29 20:10:29,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,702 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,702 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 276 flow. Second operand 5 states and 330 transitions. [2023-08-29 20:10:29,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 73 transitions, 472 flow [2023-08-29 20:10:29,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 73 transitions, 467 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:10:29,706 INFO L231 Difference]: Finished difference. Result has 55 places, 58 transitions, 378 flow [2023-08-29 20:10:29,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=378, PETRI_PLACES=55, PETRI_TRANSITIONS=58} [2023-08-29 20:10:29,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-08-29 20:10:29,707 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 58 transitions, 378 flow [2023-08-29 20:10:29,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:29,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:29,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 20:10:29,708 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:29,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:29,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1262570732, now seen corresponding path program 1 times [2023-08-29 20:10:29,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:29,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514251549] [2023-08-29 20:10:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:29,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 20:10:29,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:29,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514251549] [2023-08-29 20:10:29,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514251549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:29,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:29,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 20:10:29,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378182919] [2023-08-29 20:10:29,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:29,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 20:10:29,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:29,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 20:10:29,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 20:10:29,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 139 [2023-08-29 20:10:29,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 58 transitions, 378 flow. Second operand has 5 states, 5 states have (on average 63.2) internal successors, (316), 5 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:29,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:29,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 139 [2023-08-29 20:10:29,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:30,015 INFO L130 PetriNetUnfolder]: 87/258 cut-off events. [2023-08-29 20:10:30,016 INFO L131 PetriNetUnfolder]: For 493/503 co-relation queries the response was YES. [2023-08-29 20:10:30,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 258 events. 87/258 cut-off events. For 493/503 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1112 event pairs, 19 based on Foata normal form. 7/237 useless extension candidates. Maximal degree in co-relation 795. Up to 137 conditions per place. [2023-08-29 20:10:30,031 INFO L137 encePairwiseOnDemand]: 133/139 looper letters, 57 selfloop transitions, 8 changer transitions 2/80 dead transitions. [2023-08-29 20:10:30,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 80 transitions, 612 flow [2023-08-29 20:10:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 20:10:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 20:10:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2023-08-29 20:10:30,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021582733812949 [2023-08-29 20:10:30,033 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2023-08-29 20:10:30,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2023-08-29 20:10:30,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:30,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2023-08-29 20:10:30,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:30,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:30,035 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:30,036 INFO L175 Difference]: Start difference. First operand has 55 places, 58 transitions, 378 flow. Second operand 5 states and 349 transitions. [2023-08-29 20:10:30,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 80 transitions, 612 flow [2023-08-29 20:10:30,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 80 transitions, 592 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-29 20:10:30,039 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 420 flow [2023-08-29 20:10:30,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=420, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2023-08-29 20:10:30,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2023-08-29 20:10:30,040 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 420 flow [2023-08-29 20:10:30,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.2) internal successors, (316), 5 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:30,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:30,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:30,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 20:10:30,041 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:30,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:30,042 INFO L85 PathProgramCache]: Analyzing trace with hash -884680971, now seen corresponding path program 1 times [2023-08-29 20:10:30,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:30,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792315941] [2023-08-29 20:10:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:30,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 20:10:30,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:10:30,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792315941] [2023-08-29 20:10:30,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792315941] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:30,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:30,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 20:10:30,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889132520] [2023-08-29 20:10:30,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:30,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 20:10:30,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:10:30,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 20:10:30,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-29 20:10:30,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 139 [2023-08-29 20:10:30,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 420 flow. Second operand has 7 states, 7 states have (on average 52.714285714285715) internal successors, (369), 7 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:30,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:30,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 139 [2023-08-29 20:10:30,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:30,410 INFO L130 PetriNetUnfolder]: 98/290 cut-off events. [2023-08-29 20:10:30,411 INFO L131 PetriNetUnfolder]: For 507/522 co-relation queries the response was YES. [2023-08-29 20:10:30,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 290 events. 98/290 cut-off events. For 507/522 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1352 event pairs, 13 based on Foata normal form. 15/287 useless extension candidates. Maximal degree in co-relation 944. Up to 58 conditions per place. [2023-08-29 20:10:30,413 INFO L137 encePairwiseOnDemand]: 128/139 looper letters, 58 selfloop transitions, 24 changer transitions 1/95 dead transitions. [2023-08-29 20:10:30,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 95 transitions, 750 flow [2023-08-29 20:10:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 20:10:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 20:10:30,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 468 transitions. [2023-08-29 20:10:30,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.420863309352518 [2023-08-29 20:10:30,415 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 468 transitions. [2023-08-29 20:10:30,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 468 transitions. [2023-08-29 20:10:30,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:30,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 468 transitions. [2023-08-29 20:10:30,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.5) internal successors, (468), 8 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) [2023-08-29 20:10:30,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 139.0) internal successors, (1251), 9 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:30,419 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 139.0) internal successors, (1251), 9 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:30,419 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 420 flow. Second operand 8 states and 468 transitions. [2023-08-29 20:10:30,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 95 transitions, 750 flow [2023-08-29 20:10:30,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 95 transitions, 750 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 20:10:30,423 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 558 flow [2023-08-29 20:10:30,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=558, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-08-29 20:10:30,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2023-08-29 20:10:30,424 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 558 flow [2023-08-29 20:10:30,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 52.714285714285715) internal successors, (369), 7 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:30,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:30,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:30,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 20:10:30,425 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:30,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:30,426 INFO L85 PathProgramCache]: Analyzing trace with hash 932057488, now seen corresponding path program 1 times [2023-08-29 20:10:30,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:10:30,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398826076] [2023-08-29 20:10:30,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:30,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:10:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:10:30,439 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 20:10:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:10:30,462 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 20:10:30,463 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 20:10:30,463 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2023-08-29 20:10:30,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2023-08-29 20:10:30,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2023-08-29 20:10:30,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2023-08-29 20:10:30,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2023-08-29 20:10:30,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (12 of 18 remaining) [2023-08-29 20:10:30,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2023-08-29 20:10:30,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2023-08-29 20:10:30,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2023-08-29 20:10:30,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 18 remaining) [2023-08-29 20:10:30,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 18 remaining) [2023-08-29 20:10:30,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 18 remaining) [2023-08-29 20:10:30,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (5 of 18 remaining) [2023-08-29 20:10:30,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2023-08-29 20:10:30,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2023-08-29 20:10:30,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2023-08-29 20:10:30,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (1 of 18 remaining) [2023-08-29 20:10:30,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2023-08-29 20:10:30,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 20:10:30,468 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:30,469 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-29 20:10:30,472 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 20:10:30,472 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 20:10:30,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 08:10:30 BasicIcfg [2023-08-29 20:10:30,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 20:10:30,495 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 20:10:30,496 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 20:10:30,496 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 20:10:30,496 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:10:25" (3/4) ... [2023-08-29 20:10:30,498 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-29 20:10:30,498 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 20:10:30,499 INFO L158 Benchmark]: Toolchain (without parser) took 6152.52ms. Allocated memory was 77.6MB in the beginning and 119.5MB in the end (delta: 41.9MB). Free memory was 54.0MB in the beginning and 60.2MB in the end (delta: -6.3MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. [2023-08-29 20:10:30,499 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 62.9MB. Free memory was 40.9MB in the beginning and 40.9MB in the end (delta: 49.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 20:10:30,499 INFO L158 Benchmark]: CACSL2BoogieTranslator took 494.38ms. Allocated memory is still 77.6MB. Free memory was 53.8MB in the beginning and 52.3MB in the end (delta: 1.5MB). Peak memory consumption was 19.6MB. Max. memory is 16.1GB. [2023-08-29 20:10:30,499 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.70ms. Allocated memory is still 77.6MB. Free memory was 52.3MB in the beginning and 50.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 20:10:30,500 INFO L158 Benchmark]: Boogie Preprocessor took 28.34ms. Allocated memory is still 77.6MB. Free memory was 50.2MB in the beginning and 48.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 20:10:30,500 INFO L158 Benchmark]: RCFGBuilder took 589.38ms. Allocated memory is still 77.6MB. Free memory was 48.4MB in the beginning and 51.0MB in the end (delta: -2.5MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. [2023-08-29 20:10:30,500 INFO L158 Benchmark]: TraceAbstraction took 4985.53ms. Allocated memory was 77.6MB in the beginning and 119.5MB in the end (delta: 41.9MB). Free memory was 50.1MB in the beginning and 61.3MB in the end (delta: -11.2MB). Peak memory consumption was 30.1MB. Max. memory is 16.1GB. [2023-08-29 20:10:30,500 INFO L158 Benchmark]: Witness Printer took 2.72ms. Allocated memory is still 119.5MB. Free memory was 61.3MB in the beginning and 60.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 20:10:30,502 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 62.9MB. Free memory was 40.9MB in the beginning and 40.9MB in the end (delta: 49.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 494.38ms. Allocated memory is still 77.6MB. Free memory was 53.8MB in the beginning and 52.3MB in the end (delta: 1.5MB). Peak memory consumption was 19.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.70ms. Allocated memory is still 77.6MB. Free memory was 52.3MB in the beginning and 50.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.34ms. Allocated memory is still 77.6MB. Free memory was 50.2MB in the beginning and 48.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 589.38ms. Allocated memory is still 77.6MB. Free memory was 48.4MB in the beginning and 51.0MB in the end (delta: -2.5MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. * TraceAbstraction took 4985.53ms. Allocated memory was 77.6MB in the beginning and 119.5MB in the end (delta: 41.9MB). Free memory was 50.1MB in the beginning and 61.3MB in the end (delta: -11.2MB). Peak memory consumption was 30.1MB. Max. memory is 16.1GB. * Witness Printer took 2.72ms. Allocated memory is still 119.5MB. Free memory was 61.3MB in the beginning and 60.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 82 PlacesBefore, 42 PlacesAfterwards, 84 TransitionsBefore, 43 TransitionsAfterwards, 2016 CoEnabledTransitionPairs, 5 FixpointIterations, 13 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 1 ChoiceCompositions, 55 TotalNumberOfCompositions, 7116 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2427, independent: 2154, independent conditional: 0, independent unconditional: 2154, dependent: 273, dependent conditional: 0, dependent unconditional: 273, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 980, independent: 932, independent conditional: 0, independent unconditional: 932, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2427, independent: 1222, independent conditional: 0, independent unconditional: 1222, dependent: 225, dependent conditional: 0, dependent unconditional: 225, unknown: 980, unknown conditional: 0, unknown unconditional: 980] , Statistics on independence cache: Total cache size (in pairs): 178, Positive cache size: 147, Positive conditional cache size: 0, Positive unconditional cache size: 147, Negative cache size: 31, Negative conditional cache size: 0, Negative unconditional cache size: 31, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 722]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 722. Possible FailurePath: [L705] 0 volatile unsigned s = 0; [L706] 0 volatile unsigned t = 0; [L713] 0 unsigned c = 0; [L724] 0 pthread_t t; VAL [c=0, s=0, t=0, t={5:0}] [L725] COND TRUE 0 __VERIFIER_nondet_int() [L725] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [c=0, pthread_create(&t, 0, thr1, 0)=-1, s=0, t=0, t={5:0}] [L725] COND FALSE 0 !(__VERIFIER_nondet_int()) [L726] CALL 0 thr1(0) [L716] 0 unsigned l; VAL [arg={0:0}, arg={0:0}, arg={0:0}, c=0, l={6:0}, s=0, t=0] [L717] CALL 0 __VERIFIER_atomic_fetch_and_inc(&l) [L709] CALL 0 assume_abort_if_not(t != -1) [L3] COND FALSE 0 !(!cond) [L709] RET 0 assume_abort_if_not(t != -1) [L710] 0 *l = t [L711] 0 t = t + 1 [L717] RET 0 __VERIFIER_atomic_fetch_and_inc(&l) [L717] EXPR 0 \read(l) [L717] COND FALSE 0 !(l != s) [L718] 0 c = 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, c=1, l={6:0}, s=0, t=1] [L718] COND FALSE 0 !(!(c == 1)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, c=1, l={6:0}, s=0, t=1] [L718] 0 c = 0 VAL [arg={0:0}, arg={0:0}, arg={0:0}, c=0, l={6:0}, s=0, t=1] [L719] 0 s++ [L720] 0 return 0; VAL [\result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, c=0, l={6:0}, s=1, t=1] [L716] 1 unsigned l; VAL [\result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, c=0, l={3:0}, l={6:0}, s=1, t=1] [L720] 0 return 0; [L726] RET 0 thr1(0) [L727] 0 return 0; [L727] 0 return 0; VAL [\result=0, c=0, s=1, t=1] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 100 locations, 19 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.8s, OverallIterations: 13, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 769 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 453 mSDsluCounter, 113 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 59 mSDsCounter, 110 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1556 IncrementalHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 110 mSolverCounterUnsat, 54 mSDtfsCounter, 1556 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=558occurred in iteration=12, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 109 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 606 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-29 20:10:30,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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-ext/48_ticket_lock_low_contention_vs.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 20:10:32,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 20:10:32,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 20:10:32,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 20:10:32,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 20:10:32,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 20:10:32,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 20:10:32,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 20:10:32,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 20:10:32,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 20:10:32,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 20:10:32,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 20:10:32,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 20:10:32,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 20:10:32,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 20:10:32,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 20:10:32,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 20:10:32,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 20:10:32,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 20:10:32,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 20:10:32,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 20:10:32,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 20:10:32,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 20:10:32,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 20:10:32,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 20:10:32,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 20:10:32,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 20:10:32,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 20:10:32,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 20:10:32,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 20:10:32,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 20:10:32,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 20:10:32,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 20:10:32,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 20:10:32,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 20:10:32,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 20:10:32,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 20:10:32,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 20:10:32,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 20:10:32,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 20:10:32,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 20:10:32,476 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 20:10:32,507 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 20:10:32,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 20:10:32,509 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 20:10:32,509 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 20:10:32,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 20:10:32,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 20:10:32,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 20:10:32,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 20:10:32,511 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 20:10:32,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 20:10:32,512 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 20:10:32,512 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 20:10:32,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 20:10:32,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 20:10:32,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 20:10:32,513 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 20:10:32,513 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 20:10:32,513 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 20:10:32,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 20:10:32,513 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 20:10:32,513 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 20:10:32,514 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 20:10:32,514 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 20:10:32,514 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 20:10:32,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 20:10:32,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 20:10:32,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 20:10:32,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 20:10:32,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 20:10:32,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 20:10:32,515 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 20:10:32,515 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 20:10:32,516 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 20:10:32,516 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 20:10:32,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 20:10:32,516 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 20:10:32,516 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 20:10:32,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 20:10:32,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 20:10:32,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 20:10:32,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 20:10:32,835 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 20:10:32,835 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 20:10:32,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-08-29 20:10:33,939 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 20:10:34,227 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 20:10:34,228 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-08-29 20:10:34,253 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbd30303/ffcc42222a23407a8d4af76bbf774788/FLAG4336830b0 [2023-08-29 20:10:34,273 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbd30303/ffcc42222a23407a8d4af76bbf774788 [2023-08-29 20:10:34,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 20:10:34,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 20:10:34,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 20:10:34,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 20:10:34,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 20:10:34,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:10:34" (1/1) ... [2023-08-29 20:10:34,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2222a97a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:34, skipping insertion in model container [2023-08-29 20:10:34,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:10:34" (1/1) ... [2023-08-29 20:10:34,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 20:10:34,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 20:10:34,487 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 20:10:34,615 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-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2023-08-29 20:10:34,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 20:10:34,645 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 20:10:34,659 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-29 20:10:34,693 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-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2023-08-29 20:10:34,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 20:10:34,728 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:10:34,728 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:10:34,728 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 20:10:34,733 INFO L208 MainTranslator]: Completed translation [2023-08-29 20:10:34,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:34 WrapperNode [2023-08-29 20:10:34,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 20:10:34,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 20:10:34,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 20:10:34,734 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 20:10:34,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:34" (1/1) ... [2023-08-29 20:10:34,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:34" (1/1) ... [2023-08-29 20:10:34,770 INFO L138 Inliner]: procedures = 176, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 109 [2023-08-29 20:10:34,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 20:10:34,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 20:10:34,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 20:10:34,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 20:10:34,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:34" (1/1) ... [2023-08-29 20:10:34,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:34" (1/1) ... [2023-08-29 20:10:34,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:34" (1/1) ... [2023-08-29 20:10:34,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:34" (1/1) ... [2023-08-29 20:10:34,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:34" (1/1) ... [2023-08-29 20:10:34,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:34" (1/1) ... [2023-08-29 20:10:34,794 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:34" (1/1) ... [2023-08-29 20:10:34,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:34" (1/1) ... [2023-08-29 20:10:34,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 20:10:34,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 20:10:34,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 20:10:34,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 20:10:34,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:34" (1/1) ... [2023-08-29 20:10:34,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 20:10:34,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 20:10:34,830 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 20:10:34,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 20:10:34,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 20:10:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-29 20:10:34,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-29 20:10:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 20:10:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 20:10:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 20:10:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 20:10:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 20:10:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 20:10:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 20:10:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 20:10:34,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 20:10:34,861 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 20:10:35,038 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 20:10:35,040 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 20:10:35,282 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 20:10:35,379 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 20:10:35,379 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 20:10:35,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:10:35 BoogieIcfgContainer [2023-08-29 20:10:35,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 20:10:35,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 20:10:35,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 20:10:35,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 20:10:35,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 08:10:34" (1/3) ... [2023-08-29 20:10:35,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5348e133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 08:10:35, skipping insertion in model container [2023-08-29 20:10:35,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:10:34" (2/3) ... [2023-08-29 20:10:35,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5348e133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 08:10:35, skipping insertion in model container [2023-08-29 20:10:35,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:10:35" (3/3) ... [2023-08-29 20:10:35,388 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2023-08-29 20:10:35,401 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 20:10:35,402 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-29 20:10:35,402 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 20:10:35,469 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 20:10:35,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 84 transitions, 173 flow [2023-08-29 20:10:35,561 INFO L130 PetriNetUnfolder]: 8/128 cut-off events. [2023-08-29 20:10:35,561 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:10:35,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 128 events. 8/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 308 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2023-08-29 20:10:35,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 84 transitions, 173 flow [2023-08-29 20:10:35,571 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 84 transitions, 173 flow [2023-08-29 20:10:35,574 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 20:10:35,582 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 84 transitions, 173 flow [2023-08-29 20:10:35,584 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 84 transitions, 173 flow [2023-08-29 20:10:35,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 84 transitions, 173 flow [2023-08-29 20:10:35,606 INFO L130 PetriNetUnfolder]: 8/128 cut-off events. [2023-08-29 20:10:35,608 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:10:35,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 128 events. 8/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 308 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2023-08-29 20:10:35,612 INFO L119 LiptonReduction]: Number of co-enabled transitions 1974 [2023-08-29 20:10:37,822 INFO L134 LiptonReduction]: Checked pairs total: 7059 [2023-08-29 20:10:37,822 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-08-29 20:10:37,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 20:10:37,839 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;@2c155dd6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 20:10:37,839 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-08-29 20:10:37,841 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 20:10:37,841 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:10:37,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:37,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:10:37,842 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:37,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:37,846 INFO L85 PathProgramCache]: Analyzing trace with hash 12891, now seen corresponding path program 1 times [2023-08-29 20:10:37,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 20:10:37,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089586247] [2023-08-29 20:10:37,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:37,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:37,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 20:10:37,864 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 20:10:37,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 20:10:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:37,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 20:10:37,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 20:10:37,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2023-08-29 20:10:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:38,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 20:10:38,017 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 20:10:38,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089586247] [2023-08-29 20:10:38,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089586247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:38,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:38,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:10:38,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124049914] [2023-08-29 20:10:38,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:38,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:38,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 20:10:38,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:38,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:38,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 141 [2023-08-29 20:10:38,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:38,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:38,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 141 [2023-08-29 20:10:38,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:38,277 INFO L130 PetriNetUnfolder]: 127/356 cut-off events. [2023-08-29 20:10:38,278 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 20:10:38,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 356 events. 127/356 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1749 event pairs, 72 based on Foata normal form. 24/257 useless extension candidates. Maximal degree in co-relation 585. Up to 189 conditions per place. [2023-08-29 20:10:38,281 INFO L137 encePairwiseOnDemand]: 134/141 looper letters, 43 selfloop transitions, 3 changer transitions 1/60 dead transitions. [2023-08-29 20:10:38,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 60 transitions, 219 flow [2023-08-29 20:10:38,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:38,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-08-29 20:10:38,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342789598108747 [2023-08-29 20:10:38,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-08-29 20:10:38,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-08-29 20:10:38,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:38,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-08-29 20:10:38,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:38,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:38,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:38,304 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 91 flow. Second operand 3 states and 226 transitions. [2023-08-29 20:10:38,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 60 transitions, 219 flow [2023-08-29 20:10:38,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 219 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 20:10:38,317 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 107 flow [2023-08-29 20:10:38,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-08-29 20:10:38,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-29 20:10:38,321 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 107 flow [2023-08-29 20:10:38,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:38,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:38,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 20:10:38,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-29 20:10:38,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:38,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:38,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:38,532 INFO L85 PathProgramCache]: Analyzing trace with hash 12892, now seen corresponding path program 1 times [2023-08-29 20:10:38,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 20:10:38,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649863313] [2023-08-29 20:10:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:38,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:38,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 20:10:38,534 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 20:10:38,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 20:10:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:38,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 20:10:38,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 20:10:38,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-08-29 20:10:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:38,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 20:10:38,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 20:10:38,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649863313] [2023-08-29 20:10:38,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649863313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:38,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:38,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 20:10:38,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756688328] [2023-08-29 20:10:38,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:38,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:38,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 20:10:38,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:38,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:38,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 141 [2023-08-29 20:10:38,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:38,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:38,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 141 [2023-08-29 20:10:38,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:38,728 INFO L130 PetriNetUnfolder]: 118/332 cut-off events. [2023-08-29 20:10:38,728 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2023-08-29 20:10:38,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 332 events. 118/332 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1607 event pairs, 78 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 593. Up to 210 conditions per place. [2023-08-29 20:10:38,731 INFO L137 encePairwiseOnDemand]: 138/141 looper letters, 34 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-29 20:10:38,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 49 transitions, 197 flow [2023-08-29 20:10:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-29 20:10:38,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224586288416075 [2023-08-29 20:10:38,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-29 20:10:38,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-29 20:10:38,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:38,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-29 20:10:38,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:38,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:38,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:38,737 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 107 flow. Second operand 3 states and 221 transitions. [2023-08-29 20:10:38,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 49 transitions, 197 flow [2023-08-29 20:10:38,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:10:38,739 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 103 flow [2023-08-29 20:10:38,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-29 20:10:38,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-29 20:10:38,740 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 103 flow [2023-08-29 20:10:38,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:38,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:38,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 20:10:38,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 20:10:38,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:38,950 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:38,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:38,951 INFO L85 PathProgramCache]: Analyzing trace with hash 400044, now seen corresponding path program 1 times [2023-08-29 20:10:38,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 20:10:38,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040127601] [2023-08-29 20:10:38,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:38,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:38,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 20:10:38,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 20:10:38,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 20:10:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:39,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 20:10:39,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 20:10:39,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-08-29 20:10:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:39,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 20:10:39,056 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 20:10:39,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040127601] [2023-08-29 20:10:39,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040127601] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:39,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:39,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:10:39,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193169464] [2023-08-29 20:10:39,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:39,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:39,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 20:10:39,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:39,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:39,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 141 [2023-08-29 20:10:39,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:39,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:39,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 141 [2023-08-29 20:10:39,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:39,193 INFO L130 PetriNetUnfolder]: 109/308 cut-off events. [2023-08-29 20:10:39,193 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 20:10:39,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 308 events. 109/308 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1505 event pairs, 38 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 543. Up to 124 conditions per place. [2023-08-29 20:10:39,195 INFO L137 encePairwiseOnDemand]: 137/141 looper letters, 32 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-08-29 20:10:39,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 189 flow [2023-08-29 20:10:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-29 20:10:39,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224586288416075 [2023-08-29 20:10:39,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-29 20:10:39,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-29 20:10:39,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:39,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-29 20:10:39,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:39,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:39,201 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:39,201 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 103 flow. Second operand 3 states and 221 transitions. [2023-08-29 20:10:39,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 189 flow [2023-08-29 20:10:39,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 185 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:10:39,203 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 101 flow [2023-08-29 20:10:39,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-08-29 20:10:39,204 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-29 20:10:39,204 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 101 flow [2023-08-29 20:10:39,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:39,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:39,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 20:10:39,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-29 20:10:39,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:39,413 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:39,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:39,414 INFO L85 PathProgramCache]: Analyzing trace with hash 400043, now seen corresponding path program 1 times [2023-08-29 20:10:39,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 20:10:39,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799877658] [2023-08-29 20:10:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:39,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:39,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 20:10:39,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 20:10:39,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 20:10:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:39,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 20:10:39,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 20:10:39,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2023-08-29 20:10:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:39,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 20:10:39,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 20:10:39,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799877658] [2023-08-29 20:10:39,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799877658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:39,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:39,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:10:39,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143349484] [2023-08-29 20:10:39,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:39,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:39,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 20:10:39,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:39,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:39,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 141 [2023-08-29 20:10:39,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:39,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:39,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 141 [2023-08-29 20:10:39,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:39,634 INFO L130 PetriNetUnfolder]: 101/287 cut-off events. [2023-08-29 20:10:39,635 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-08-29 20:10:39,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 287 events. 101/287 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1341 event pairs, 38 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 524. Up to 116 conditions per place. [2023-08-29 20:10:39,637 INFO L137 encePairwiseOnDemand]: 133/141 looper letters, 35 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2023-08-29 20:10:39,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 221 flow [2023-08-29 20:10:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:39,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-08-29 20:10:39,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2023-08-29 20:10:39,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-08-29 20:10:39,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-08-29 20:10:39,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:39,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-08-29 20:10:39,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:39,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:39,641 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:39,642 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 101 flow. Second operand 3 states and 219 transitions. [2023-08-29 20:10:39,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 221 flow [2023-08-29 20:10:39,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 213 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:10:39,643 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 151 flow [2023-08-29 20:10:39,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-08-29 20:10:39,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-29 20:10:39,645 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 151 flow [2023-08-29 20:10:39,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:39,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:39,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 20:10:39,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 20:10:39,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:39,854 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:39,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:39,855 INFO L85 PathProgramCache]: Analyzing trace with hash 384409348, now seen corresponding path program 1 times [2023-08-29 20:10:39,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 20:10:39,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753081157] [2023-08-29 20:10:39,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:39,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:39,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 20:10:39,857 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 20:10:39,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 20:10:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:39,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-29 20:10:39,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 20:10:39,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2023-08-29 20:10:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:39,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 20:10:39,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 20:10:39,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753081157] [2023-08-29 20:10:39,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753081157] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:39,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:39,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:10:39,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359003439] [2023-08-29 20:10:39,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:39,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:39,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 20:10:39,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:39,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:39,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 141 [2023-08-29 20:10:39,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:39,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:39,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 141 [2023-08-29 20:10:39,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:40,057 INFO L130 PetriNetUnfolder]: 109/311 cut-off events. [2023-08-29 20:10:40,057 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-08-29 20:10:40,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 311 events. 109/311 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1502 event pairs, 7 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 628. Up to 140 conditions per place. [2023-08-29 20:10:40,059 INFO L137 encePairwiseOnDemand]: 132/141 looper letters, 41 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2023-08-29 20:10:40,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 307 flow [2023-08-29 20:10:40,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-29 20:10:40,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2023-08-29 20:10:40,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-29 20:10:40,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-29 20:10:40,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:40,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-29 20:10:40,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:40,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:40,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:40,064 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 151 flow. Second operand 3 states and 225 transitions. [2023-08-29 20:10:40,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 307 flow [2023-08-29 20:10:40,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 289 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:10:40,068 INFO L231 Difference]: Finished difference. Result has 45 places, 49 transitions, 207 flow [2023-08-29 20:10:40,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=207, PETRI_PLACES=45, PETRI_TRANSITIONS=49} [2023-08-29 20:10:40,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-29 20:10:40,070 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 49 transitions, 207 flow [2023-08-29 20:10:40,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:40,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:40,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 20:10:40,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 20:10:40,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:40,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:40,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash 384409349, now seen corresponding path program 1 times [2023-08-29 20:10:40,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 20:10:40,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050279567] [2023-08-29 20:10:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:40,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:40,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 20:10:40,281 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 20:10:40,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 20:10:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:40,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 20:10:40,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 20:10:40,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-08-29 20:10:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:40,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 20:10:40,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 20:10:40,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050279567] [2023-08-29 20:10:40,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050279567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:40,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:40,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:10:40,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583650321] [2023-08-29 20:10:40,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:40,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:40,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 20:10:40,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:40,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:40,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 141 [2023-08-29 20:10:40,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 49 transitions, 207 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:40,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:40,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 141 [2023-08-29 20:10:40,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:40,482 INFO L130 PetriNetUnfolder]: 95/269 cut-off events. [2023-08-29 20:10:40,482 INFO L131 PetriNetUnfolder]: For 167/168 co-relation queries the response was YES. [2023-08-29 20:10:40,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 269 events. 95/269 cut-off events. For 167/168 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1203 event pairs, 12 based on Foata normal form. 28/261 useless extension candidates. Maximal degree in co-relation 657. Up to 152 conditions per place. [2023-08-29 20:10:40,484 INFO L137 encePairwiseOnDemand]: 137/141 looper letters, 41 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2023-08-29 20:10:40,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 327 flow [2023-08-29 20:10:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-29 20:10:40,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2023-08-29 20:10:40,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-29 20:10:40,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-29 20:10:40,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:40,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-29 20:10:40,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:40,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:40,487 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:40,487 INFO L175 Difference]: Start difference. First operand has 45 places, 49 transitions, 207 flow. Second operand 3 states and 225 transitions. [2023-08-29 20:10:40,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 327 flow [2023-08-29 20:10:40,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 309 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:10:40,490 INFO L231 Difference]: Finished difference. Result has 43 places, 47 transitions, 195 flow [2023-08-29 20:10:40,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=43, PETRI_TRANSITIONS=47} [2023-08-29 20:10:40,490 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-29 20:10:40,490 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 47 transitions, 195 flow [2023-08-29 20:10:40,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:40,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:40,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 20:10:40,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 20:10:40,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:40,700 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:40,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:40,700 INFO L85 PathProgramCache]: Analyzing trace with hash -966903226, now seen corresponding path program 1 times [2023-08-29 20:10:40,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 20:10:40,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053014907] [2023-08-29 20:10:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:40,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:40,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 20:10:40,702 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 20:10:40,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 20:10:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:40,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 20:10:40,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 20:10:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:40,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 20:10:40,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 20:10:40,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053014907] [2023-08-29 20:10:40,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053014907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:40,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:40,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:10:40,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612064995] [2023-08-29 20:10:40,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:40,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 20:10:40,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 20:10:40,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 20:10:40,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 20:10:40,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 141 [2023-08-29 20:10:40,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 47 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:40,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:40,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 141 [2023-08-29 20:10:40,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:40,901 INFO L130 PetriNetUnfolder]: 157/367 cut-off events. [2023-08-29 20:10:40,901 INFO L131 PetriNetUnfolder]: For 238/239 co-relation queries the response was YES. [2023-08-29 20:10:40,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 987 conditions, 367 events. 157/367 cut-off events. For 238/239 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1571 event pairs, 60 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 936. Up to 246 conditions per place. [2023-08-29 20:10:40,903 INFO L137 encePairwiseOnDemand]: 133/141 looper letters, 57 selfloop transitions, 6 changer transitions 3/70 dead transitions. [2023-08-29 20:10:40,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 70 transitions, 409 flow [2023-08-29 20:10:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 20:10:40,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 20:10:40,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2023-08-29 20:10:40,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295508274231678 [2023-08-29 20:10:40,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2023-08-29 20:10:40,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2023-08-29 20:10:40,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:40,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2023-08-29 20:10:40,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:40,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:40,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:40,907 INFO L175 Difference]: Start difference. First operand has 43 places, 47 transitions, 195 flow. Second operand 3 states and 224 transitions. [2023-08-29 20:10:40,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 70 transitions, 409 flow [2023-08-29 20:10:40,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 70 transitions, 395 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:10:40,909 INFO L231 Difference]: Finished difference. Result has 45 places, 52 transitions, 233 flow [2023-08-29 20:10:40,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=233, PETRI_PLACES=45, PETRI_TRANSITIONS=52} [2023-08-29 20:10:40,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-29 20:10:40,910 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 52 transitions, 233 flow [2023-08-29 20:10:40,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:40,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:40,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:40,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-29 20:10:41,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:41,121 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:41,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:41,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1768357979, now seen corresponding path program 1 times [2023-08-29 20:10:41,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 20:10:41,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914372916] [2023-08-29 20:10:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:41,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:41,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 20:10:41,123 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 20:10:41,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 20:10:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:41,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 20:10:41,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 20:10:43,396 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#t~1#1.base_44| (_ BitVec 32)) (|v_ULTIMATE.start_thr1_~#l~0#1.base_53| (_ BitVec 32))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#t~1#1.base_44| (_ bv1 1)))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#t~1#1.base_44|)) (= |c_#valid| (store (store .cse0 |v_ULTIMATE.start_thr1_~#l~0#1.base_53| (_ bv0 1)) |v_ULTIMATE.start_main_~#t~1#1.base_44| (_ bv0 1))) (= (select .cse0 |v_ULTIMATE.start_thr1_~#l~0#1.base_53|) (_ bv0 1))))) is different from true [2023-08-29 20:10:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:10:43,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 20:10:43,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 20:10:43,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914372916] [2023-08-29 20:10:43,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914372916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:43,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:43,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 20:10:43,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429691241] [2023-08-29 20:10:43,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:43,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 20:10:43,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 20:10:43,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 20:10:43,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=12, Unknown=2, NotChecked=6, Total=30 [2023-08-29 20:10:43,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 141 [2023-08-29 20:10:43,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 52 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:43,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:43,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 141 [2023-08-29 20:10:43,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:43,589 INFO L130 PetriNetUnfolder]: 120/322 cut-off events. [2023-08-29 20:10:43,589 INFO L131 PetriNetUnfolder]: For 144/155 co-relation queries the response was YES. [2023-08-29 20:10:43,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 914 conditions, 322 events. 120/322 cut-off events. For 144/155 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1465 event pairs, 35 based on Foata normal form. 10/272 useless extension candidates. Maximal degree in co-relation 862. Up to 237 conditions per place. [2023-08-29 20:10:43,591 INFO L137 encePairwiseOnDemand]: 134/141 looper letters, 42 selfloop transitions, 7 changer transitions 3/64 dead transitions. [2023-08-29 20:10:43,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 379 flow [2023-08-29 20:10:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 20:10:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 20:10:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 256 transitions. [2023-08-29 20:10:43,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36312056737588655 [2023-08-29 20:10:43,593 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 256 transitions. [2023-08-29 20:10:43,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 256 transitions. [2023-08-29 20:10:43,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:43,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 256 transitions. [2023-08-29 20:10:43,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 51.2) internal successors, (256), 5 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:43,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:43,596 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:43,596 INFO L175 Difference]: Start difference. First operand has 45 places, 52 transitions, 233 flow. Second operand 5 states and 256 transitions. [2023-08-29 20:10:43,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 379 flow [2023-08-29 20:10:43,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 367 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 20:10:43,598 INFO L231 Difference]: Finished difference. Result has 48 places, 56 transitions, 266 flow [2023-08-29 20:10:43,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=48, PETRI_TRANSITIONS=56} [2023-08-29 20:10:43,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2023-08-29 20:10:43,599 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 56 transitions, 266 flow [2023-08-29 20:10:43,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:43,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:43,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:43,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 20:10:43,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:43,808 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:43,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:43,809 INFO L85 PathProgramCache]: Analyzing trace with hash -74249418, now seen corresponding path program 1 times [2023-08-29 20:10:43,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 20:10:43,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199257383] [2023-08-29 20:10:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:43,810 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:43,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 20:10:43,811 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 20:10:43,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 20:10:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:43,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 20:10:43,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 20:10:43,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2023-08-29 20:10:43,919 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 20:10:43,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 20:10:43,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 20 [2023-08-29 20:10:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 20:10:43,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 20:10:43,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 20:10:43,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199257383] [2023-08-29 20:10:43,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199257383] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:43,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:43,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 20:10:43,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063406287] [2023-08-29 20:10:43,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:43,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 20:10:43,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 20:10:43,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 20:10:43,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 20:10:44,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 141 [2023-08-29 20:10:44,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 56 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:44,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:44,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 141 [2023-08-29 20:10:44,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:44,152 INFO L130 PetriNetUnfolder]: 92/273 cut-off events. [2023-08-29 20:10:44,152 INFO L131 PetriNetUnfolder]: For 144/153 co-relation queries the response was YES. [2023-08-29 20:10:44,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 273 events. 92/273 cut-off events. For 144/153 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1256 event pairs, 16 based on Foata normal form. 9/237 useless extension candidates. Maximal degree in co-relation 734. Up to 83 conditions per place. [2023-08-29 20:10:44,153 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 44 selfloop transitions, 9 changer transitions 1/69 dead transitions. [2023-08-29 20:10:44,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 425 flow [2023-08-29 20:10:44,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 20:10:44,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 20:10:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 260 transitions. [2023-08-29 20:10:44,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46099290780141844 [2023-08-29 20:10:44,155 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 260 transitions. [2023-08-29 20:10:44,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 260 transitions. [2023-08-29 20:10:44,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:44,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 260 transitions. [2023-08-29 20:10:44,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:44,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:44,157 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:44,157 INFO L175 Difference]: Start difference. First operand has 48 places, 56 transitions, 266 flow. Second operand 4 states and 260 transitions. [2023-08-29 20:10:44,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 425 flow [2023-08-29 20:10:44,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 416 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 20:10:44,160 INFO L231 Difference]: Finished difference. Result has 50 places, 56 transitions, 288 flow [2023-08-29 20:10:44,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=50, PETRI_TRANSITIONS=56} [2023-08-29 20:10:44,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2023-08-29 20:10:44,160 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 56 transitions, 288 flow [2023-08-29 20:10:44,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:44,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:44,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:44,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 20:10:44,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:44,370 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:44,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:44,370 INFO L85 PathProgramCache]: Analyzing trace with hash -724035745, now seen corresponding path program 1 times [2023-08-29 20:10:44,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 20:10:44,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768585303] [2023-08-29 20:10:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:44,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:44,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 20:10:44,372 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 20:10:44,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 20:10:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:44,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 20:10:44,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 20:10:44,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2023-08-29 20:10:44,486 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-29 20:10:44,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-29 20:10:44,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2023-08-29 20:10:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 20:10:44,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 20:10:44,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 20:10:44,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768585303] [2023-08-29 20:10:44,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768585303] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:44,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:44,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 20:10:44,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324773185] [2023-08-29 20:10:44,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:44,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 20:10:44,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 20:10:44,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 20:10:44,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 20:10:44,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 141 [2023-08-29 20:10:44,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 56 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:44,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:44,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 141 [2023-08-29 20:10:44,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:44,740 INFO L130 PetriNetUnfolder]: 90/265 cut-off events. [2023-08-29 20:10:44,740 INFO L131 PetriNetUnfolder]: For 261/271 co-relation queries the response was YES. [2023-08-29 20:10:44,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 265 events. 90/265 cut-off events. For 261/271 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1200 event pairs, 12 based on Foata normal form. 8/235 useless extension candidates. Maximal degree in co-relation 738. Up to 59 conditions per place. [2023-08-29 20:10:44,742 INFO L137 encePairwiseOnDemand]: 129/141 looper letters, 39 selfloop transitions, 20 changer transitions 2/75 dead transitions. [2023-08-29 20:10:44,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 75 transitions, 482 flow [2023-08-29 20:10:44,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 20:10:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 20:10:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 330 transitions. [2023-08-29 20:10:44,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46808510638297873 [2023-08-29 20:10:44,744 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 330 transitions. [2023-08-29 20:10:44,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 330 transitions. [2023-08-29 20:10:44,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:44,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 330 transitions. [2023-08-29 20:10:44,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:44,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:44,747 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:44,747 INFO L175 Difference]: Start difference. First operand has 50 places, 56 transitions, 288 flow. Second operand 5 states and 330 transitions. [2023-08-29 20:10:44,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 75 transitions, 482 flow [2023-08-29 20:10:44,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 75 transitions, 477 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 20:10:44,750 INFO L231 Difference]: Finished difference. Result has 53 places, 60 transitions, 388 flow [2023-08-29 20:10:44,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=388, PETRI_PLACES=53, PETRI_TRANSITIONS=60} [2023-08-29 20:10:44,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2023-08-29 20:10:44,751 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 60 transitions, 388 flow [2023-08-29 20:10:44,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:44,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:44,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:44,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 20:10:44,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:44,960 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:44,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:44,961 INFO L85 PathProgramCache]: Analyzing trace with hash -293284389, now seen corresponding path program 1 times [2023-08-29 20:10:44,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 20:10:44,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577664444] [2023-08-29 20:10:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:44,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:44,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 20:10:44,962 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 20:10:44,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 20:10:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:10:45,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 20:10:45,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 20:10:45,090 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 [2023-08-29 20:10:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 20:10:45,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 20:10:45,103 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 20:10:45,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577664444] [2023-08-29 20:10:45,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577664444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 20:10:45,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 20:10:45,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 20:10:45,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623592971] [2023-08-29 20:10:45,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 20:10:45,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 20:10:45,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 20:10:45,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 20:10:45,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 20:10:45,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 141 [2023-08-29 20:10:45,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 60 transitions, 388 flow. Second operand has 5 states, 5 states have (on average 64.2) internal successors, (321), 5 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:45,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:10:45,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 141 [2023-08-29 20:10:45,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:10:45,275 INFO L130 PetriNetUnfolder]: 92/273 cut-off events. [2023-08-29 20:10:45,276 INFO L131 PetriNetUnfolder]: For 559/569 co-relation queries the response was YES. [2023-08-29 20:10:45,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 273 events. 92/273 cut-off events. For 559/569 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1231 event pairs, 21 based on Foata normal form. 7/247 useless extension candidates. Maximal degree in co-relation 851. Up to 143 conditions per place. [2023-08-29 20:10:45,277 INFO L137 encePairwiseOnDemand]: 135/141 looper letters, 57 selfloop transitions, 8 changer transitions 2/82 dead transitions. [2023-08-29 20:10:45,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 622 flow [2023-08-29 20:10:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 20:10:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 20:10:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 354 transitions. [2023-08-29 20:10:45,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502127659574468 [2023-08-29 20:10:45,279 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 354 transitions. [2023-08-29 20:10:45,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 354 transitions. [2023-08-29 20:10:45,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:10:45,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 354 transitions. [2023-08-29 20:10:45,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 70.8) internal successors, (354), 5 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:45,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:45,283 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:45,283 INFO L175 Difference]: Start difference. First operand has 53 places, 60 transitions, 388 flow. Second operand 5 states and 354 transitions. [2023-08-29 20:10:45,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 622 flow [2023-08-29 20:10:45,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 82 transitions, 612 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-29 20:10:45,287 INFO L231 Difference]: Finished difference. Result has 59 places, 67 transitions, 438 flow [2023-08-29 20:10:45,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=59, PETRI_TRANSITIONS=67} [2023-08-29 20:10:45,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2023-08-29 20:10:45,288 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 67 transitions, 438 flow [2023-08-29 20:10:45,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.2) internal successors, (321), 5 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:10:45,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:10:45,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:45,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 20:10:45,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:45,497 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-29 20:10:45,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:10:45,497 INFO L85 PathProgramCache]: Analyzing trace with hash 836317778, now seen corresponding path program 1 times [2023-08-29 20:10:45,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 20:10:45,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066679342] [2023-08-29 20:10:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:10:45,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:45,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 20:10:45,499 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 20:10:45,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 20:10:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:10:45,583 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 20:10:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 20:10:45,644 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-29 20:10:45,644 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 20:10:45,645 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2023-08-29 20:10:45,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2023-08-29 20:10:45,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2023-08-29 20:10:45,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2023-08-29 20:10:45,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2023-08-29 20:10:45,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (12 of 18 remaining) [2023-08-29 20:10:45,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2023-08-29 20:10:45,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2023-08-29 20:10:45,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2023-08-29 20:10:45,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 18 remaining) [2023-08-29 20:10:45,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 18 remaining) [2023-08-29 20:10:45,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 18 remaining) [2023-08-29 20:10:45,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (5 of 18 remaining) [2023-08-29 20:10:45,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2023-08-29 20:10:45,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2023-08-29 20:10:45,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2023-08-29 20:10:45,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (1 of 18 remaining) [2023-08-29 20:10:45,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2023-08-29 20:10:45,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-29 20:10:45,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 20:10:45,849 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:10:45,851 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-29 20:10:45,853 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 20:10:45,853 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 20:10:45,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 08:10:45 BasicIcfg [2023-08-29 20:10:45,878 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 20:10:45,879 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 20:10:45,879 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 20:10:45,879 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 20:10:45,879 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:10:35" (3/4) ... [2023-08-29 20:10:45,882 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-29 20:10:45,882 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 20:10:45,882 INFO L158 Benchmark]: Toolchain (without parser) took 11605.94ms. Allocated memory was 62.9MB in the beginning and 113.2MB in the end (delta: 50.3MB). Free memory was 38.6MB in the beginning and 36.7MB in the end (delta: 1.9MB). Peak memory consumption was 54.3MB. Max. memory is 16.1GB. [2023-08-29 20:10:45,882 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory was 40.3MB in the beginning and 40.2MB in the end (delta: 57.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 20:10:45,883 INFO L158 Benchmark]: CACSL2BoogieTranslator took 454.03ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 38.4MB in the beginning and 49.3MB in the end (delta: -10.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-08-29 20:10:45,883 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.77ms. Allocated memory is still 77.6MB. Free memory was 49.3MB in the beginning and 47.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 20:10:45,883 INFO L158 Benchmark]: Boogie Preprocessor took 26.64ms. Allocated memory is still 77.6MB. Free memory was 47.1MB in the beginning and 45.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 20:10:45,884 INFO L158 Benchmark]: RCFGBuilder took 582.37ms. Allocated memory is still 77.6MB. Free memory was 45.2MB in the beginning and 36.9MB in the end (delta: 8.3MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2023-08-29 20:10:45,884 INFO L158 Benchmark]: TraceAbstraction took 10495.73ms. Allocated memory was 77.6MB in the beginning and 113.2MB in the end (delta: 35.7MB). Free memory was 36.2MB in the beginning and 36.7MB in the end (delta: -468.1kB). Peak memory consumption was 34.1MB. Max. memory is 16.1GB. [2023-08-29 20:10:45,884 INFO L158 Benchmark]: Witness Printer took 2.96ms. Allocated memory is still 113.2MB. Free memory is still 36.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 20:10:45,885 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory was 40.3MB in the beginning and 40.2MB in the end (delta: 57.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 454.03ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 38.4MB in the beginning and 49.3MB in the end (delta: -10.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.77ms. Allocated memory is still 77.6MB. Free memory was 49.3MB in the beginning and 47.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.64ms. Allocated memory is still 77.6MB. Free memory was 47.1MB in the beginning and 45.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 582.37ms. Allocated memory is still 77.6MB. Free memory was 45.2MB in the beginning and 36.9MB in the end (delta: 8.3MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. * TraceAbstraction took 10495.73ms. Allocated memory was 77.6MB in the beginning and 113.2MB in the end (delta: 35.7MB). Free memory was 36.2MB in the beginning and 36.7MB in the end (delta: -468.1kB). Peak memory consumption was 34.1MB. Max. memory is 16.1GB. * Witness Printer took 2.96ms. Allocated memory is still 113.2MB. Free memory is still 36.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 82 PlacesBefore, 42 PlacesAfterwards, 84 TransitionsBefore, 43 TransitionsAfterwards, 1974 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 1 ChoiceCompositions, 57 TotalNumberOfCompositions, 7059 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2443, independent: 2172, independent conditional: 0, independent unconditional: 2172, dependent: 271, dependent conditional: 0, dependent unconditional: 271, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 956, independent: 911, independent conditional: 0, independent unconditional: 911, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2443, independent: 1261, independent conditional: 0, independent unconditional: 1261, dependent: 226, dependent conditional: 0, dependent unconditional: 226, unknown: 956, unknown conditional: 0, unknown unconditional: 956] , Statistics on independence cache: Total cache size (in pairs): 183, Positive cache size: 152, Positive conditional cache size: 0, Positive unconditional cache size: 152, Negative cache size: 31, Negative conditional cache size: 0, Negative unconditional cache size: 31, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 722]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 722. Possible FailurePath: [L705] 0 volatile unsigned s = 0; [L706] 0 volatile unsigned t = 0; [L713] 0 unsigned c = 0; [L724] 0 pthread_t t; VAL [c=0, s=0, t=0, t={-6:0}] [L725] COND TRUE 0 __VERIFIER_nondet_int() [L725] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [c=0, pthread_create(&t, 0, thr1, 0)=-1, s=0, t=0, t={-6:0}] [L725] COND FALSE 0 !(__VERIFIER_nondet_int()) [L726] CALL 0 thr1(0) [L716] 0 unsigned l; VAL [arg={0:0}, arg={0:0}, arg={0:0}, c=0, l={-10:0}, s=0, t=0] [L716] 1 unsigned l; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, c=0, l={-10:0}, l={-2:0}, s=0, t=0] [L717] CALL 0 __VERIFIER_atomic_fetch_and_inc(&l) [L709] CALL 0 assume_abort_if_not(t != -1) [L3] COND FALSE 0 !(!cond) [L709] RET 0 assume_abort_if_not(t != -1) [L710] 0 *l = t [L711] 0 t = t + 1 [L717] RET 0 __VERIFIER_atomic_fetch_and_inc(&l) [L717] EXPR 0 \read(l) [L717] COND FALSE 0 !(l != s) [L718] 0 c = 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, c=1, l={-10:0}, l={-2:0}, s=0, t=1] [L718] COND FALSE 0 !(!(c == 1)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, c=1, l={-10:0}, l={-2:0}, s=0, t=1] [L718] 0 c = 0 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, c=0, l={-10:0}, l={-2:0}, s=0, t=1] [L719] 0 s++ [L720] 0 return 0; VAL [\result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, c=0, l={-10:0}, l={-2:0}, s=1, t=1] [L720] 0 return 0; [L726] RET 0 thr1(0) [L727] 0 return 0; [L727] 0 return 0; VAL [\result=0, c=0, s=1, t=1] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 100 locations, 19 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.4s, OverallIterations: 12, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 559 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 314 mSDsluCounter, 54 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 58 IncrementalHoareTripleChecker+Unchecked, 11 mSDsCounter, 90 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1050 IncrementalHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 90 mSolverCounterUnsat, 43 mSDtfsCounter, 1050 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=438occurred in iteration=11, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 68 ConstructedInterpolants, 9 QuantifiedInterpolants, 565 SizeOfPredicates, 4 NumberOfNonLiveVariables, 654 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 3/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-29 20:10:45,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample