/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-RepeatedSemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-13 00:32:12,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 00:32:12,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 00:32:12,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 00:32:12,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 00:32:12,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 00:32:12,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 00:32:12,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 00:32:12,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 00:32:12,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 00:32:12,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 00:32:12,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 00:32:12,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 00:32:12,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 00:32:12,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 00:32:12,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 00:32:12,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 00:32:12,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 00:32:12,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 00:32:12,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 00:32:12,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 00:32:12,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 00:32:12,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 00:32:12,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 00:32:12,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 00:32:12,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 00:32:12,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 00:32:12,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 00:32:12,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 00:32:12,957 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 00:32:12,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 00:32:12,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 00:32:12,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 00:32:12,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 00:32:12,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 00:32:12,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 00:32:12,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 00:32:12,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 00:32:12,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 00:32:12,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 00:32:12,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 00:32:12,968 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-RepeatedSemanticLbe.epf [2022-12-13 00:32:13,007 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 00:32:13,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 00:32:13,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 00:32:13,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 00:32:13,011 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 00:32:13,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 00:32:13,011 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 00:32:13,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 00:32:13,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 00:32:13,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 00:32:13,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 00:32:13,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 00:32:13,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 00:32:13,013 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 00:32:13,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 00:32:13,013 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 00:32:13,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 00:32:13,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 00:32:13,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 00:32:13,014 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-13 00:32:13,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 00:32:13,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 00:32:13,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 00:32:13,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 00:32:13,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 00:32:13,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 00:32:13,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 00:32:13,015 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=REPEATED_LIPTON_PN [2022-12-13 00:32:13,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-13 00:32:13,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 00:32:13,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 00:32:13,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 00:32:13,394 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 00:32:13,395 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 00:32:13,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2022-12-13 00:32:14,642 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 00:32:14,917 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 00:32:14,918 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2022-12-13 00:32:14,965 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/538260619/62de1da021ed49ffa49779663467b982/FLAG2738be162 [2022-12-13 00:32:14,987 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/538260619/62de1da021ed49ffa49779663467b982 [2022-12-13 00:32:14,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 00:32:14,993 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-13 00:32:14,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 00:32:14,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 00:32:15,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 00:32:15,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:32:14" (1/1) ... [2022-12-13 00:32:15,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f7d1da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:32:15, skipping insertion in model container [2022-12-13 00:32:15,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:32:14" (1/1) ... [2022-12-13 00:32:15,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 00:32:15,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 00:32:15,258 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 00:32:15,427 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,427 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,427 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,428 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,430 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,430 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,431 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,431 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,432 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,432 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,433 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,434 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,436 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i[31244,31257] [2022-12-13 00:32:15,441 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,441 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,442 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,442 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 00:32:15,465 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 00:32:15,491 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-13 00:32:15,514 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,515 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,515 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,515 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,516 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,516 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,516 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,517 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,517 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,517 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,517 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,517 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,518 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i[31244,31257] [2022-12-13 00:32:15,518 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,518 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,519 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 00:32:15,519 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 00:32:15,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 00:32:15,573 INFO L208 MainTranslator]: Completed translation [2022-12-13 00:32:15,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:32:15 WrapperNode [2022-12-13 00:32:15,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 00:32:15,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 00:32:15,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 00:32:15,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 00:32:15,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:32:15" (1/1) ... [2022-12-13 00:32:15,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:32:15" (1/1) ... [2022-12-13 00:32:15,641 INFO L138 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2022-12-13 00:32:15,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 00:32:15,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 00:32:15,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 00:32:15,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 00:32:15,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:32:15" (1/1) ... [2022-12-13 00:32:15,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:32:15" (1/1) ... [2022-12-13 00:32:15,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:32:15" (1/1) ... [2022-12-13 00:32:15,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:32:15" (1/1) ... [2022-12-13 00:32:15,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:32:15" (1/1) ... [2022-12-13 00:32:15,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:32:15" (1/1) ... [2022-12-13 00:32:15,677 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:32:15" (1/1) ... [2022-12-13 00:32:15,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:32:15" (1/1) ... [2022-12-13 00:32:15,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 00:32:15,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 00:32:15,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 00:32:15,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 00:32:15,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:32:15" (1/1) ... [2022-12-13 00:32:15,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 00:32:15,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 00:32:15,716 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) [2022-12-13 00:32:15,739 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 [2022-12-13 00:32:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 00:32:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 00:32:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 00:32:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 00:32:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2022-12-13 00:32:15,770 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2022-12-13 00:32:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 00:32:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 00:32:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 00:32:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 00:32:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 00:32:15,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 00:32:15,772 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2022-12-13 00:32:15,772 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2022-12-13 00:32:15,773 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-13 00:32:15,963 INFO L236 CfgBuilder]: Building ICFG [2022-12-13 00:32:15,965 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 00:32:16,201 INFO L277 CfgBuilder]: Performing block encoding [2022-12-13 00:32:16,256 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 00:32:16,257 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 00:32:16,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:32:16 BoogieIcfgContainer [2022-12-13 00:32:16,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 00:32:16,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 00:32:16,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 00:32:16,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 00:32:16,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:32:14" (1/3) ... [2022-12-13 00:32:16,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345990ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:32:16, skipping insertion in model container [2022-12-13 00:32:16,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:32:15" (2/3) ... [2022-12-13 00:32:16,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345990ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:32:16, skipping insertion in model container [2022-12-13 00:32:16,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:32:16" (3/3) ... [2022-12-13 00:32:16,268 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2022-12-13 00:32:16,286 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 00:32:16,288 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 00:32:16,288 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 00:32:16,383 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 00:32:16,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 110 transitions, 252 flow [2022-12-13 00:32:16,506 INFO L130 PetriNetUnfolder]: 2/106 cut-off events. [2022-12-13 00:32:16,506 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 00:32:16,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 106 events. 2/106 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2022-12-13 00:32:16,512 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 110 transitions, 252 flow [2022-12-13 00:32:16,518 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 93 transitions, 207 flow [2022-12-13 00:32:16,520 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 00:32:16,555 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 93 transitions, 207 flow [2022-12-13 00:32:16,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 93 transitions, 207 flow [2022-12-13 00:32:16,598 INFO L130 PetriNetUnfolder]: 2/93 cut-off events. [2022-12-13 00:32:16,598 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 00:32:16,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 93 events. 2/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2022-12-13 00:32:16,603 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 93 transitions, 207 flow [2022-12-13 00:32:16,603 INFO L226 LiptonReduction]: Number of co-enabled transitions 2574 [2022-12-13 00:32:20,223 INFO L241 LiptonReduction]: Total number of compositions: 67 [2022-12-13 00:32:20,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 00:32:20,243 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=REPEATED_LIPTON_PN, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@390140c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-13 00:32:20,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 00:32:20,249 INFO L130 PetriNetUnfolder]: 1/38 cut-off events. [2022-12-13 00:32:20,250 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 00:32:20,250 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 00:32:20,250 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 00:32:20,251 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 00:32:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 00:32:20,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2116681510, now seen corresponding path program 1 times [2022-12-13 00:32:20,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 00:32:20,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446611126] [2022-12-13 00:32:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 00:32:20,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 00:32:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 00:32:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 00:32:20,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 00:32:20,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446611126] [2022-12-13 00:32:20,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446611126] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 00:32:20,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 00:32:20,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 00:32:20,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832635610] [2022-12-13 00:32:20,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 00:32:20,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 00:32:20,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 00:32:20,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 00:32:20,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 00:32:20,567 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 73 [2022-12-13 00:32:20,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 167 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 00:32:20,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 00:32:20,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 73 [2022-12-13 00:32:20,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 00:32:30,182 INFO L130 PetriNetUnfolder]: 111508/153289 cut-off events. [2022-12-13 00:32:30,182 INFO L131 PetriNetUnfolder]: For 7195/7195 co-relation queries the response was YES. [2022-12-13 00:32:30,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306352 conditions, 153289 events. 111508/153289 cut-off events. For 7195/7195 co-relation queries the response was YES. Maximal size of possible extension queue 4575. Compared 1038520 event pairs, 19188 based on Foata normal form. 0/97402 useless extension candidates. Maximal degree in co-relation 270767. Up to 69169 conditions per place. [2022-12-13 00:32:31,252 INFO L137 encePairwiseOnDemand]: 57/73 looper letters, 242 selfloop transitions, 28 changer transitions 29/312 dead transitions. [2022-12-13 00:32:31,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 312 transitions, 1312 flow [2022-12-13 00:32:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 00:32:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 00:32:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 450 transitions. [2022-12-13 00:32:31,266 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.684931506849315 [2022-12-13 00:32:31,268 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 167 flow. Second operand 9 states and 450 transitions. [2022-12-13 00:32:31,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 312 transitions, 1312 flow [2022-12-13 00:32:31,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 312 transitions, 1259 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 00:32:31,378 INFO L231 Difference]: Finished difference. Result has 87 places, 96 transitions, 326 flow [2022-12-13 00:32:31,380 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=326, PETRI_PLACES=87, PETRI_TRANSITIONS=96} [2022-12-13 00:32:31,383 INFO L295 CegarLoopForPetriNet]: 82 programPoint places, 5 predicate places. [2022-12-13 00:32:31,384 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 00:32:31,385 INFO L89 Accepts]: Start accepts. Operand has 87 places, 96 transitions, 326 flow [2022-12-13 00:32:31,406 INFO L95 Accepts]: Finished accepts. [2022-12-13 00:32:31,406 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 00:32:31,407 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 96 transitions, 326 flow [2022-12-13 00:32:31,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 96 transitions, 326 flow [2022-12-13 00:32:31,463 INFO L130 PetriNetUnfolder]: 98/571 cut-off events. [2022-12-13 00:32:31,464 INFO L131 PetriNetUnfolder]: For 97/105 co-relation queries the response was YES. [2022-12-13 00:32:31,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 571 events. 98/571 cut-off events. For 97/105 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4543 event pairs, 6 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 909. Up to 114 conditions per place. [2022-12-13 00:32:31,485 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 96 transitions, 326 flow [2022-12-13 00:32:31,486 INFO L226 LiptonReduction]: Number of co-enabled transitions 3878 [2022-12-13 00:32:31,524 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 00:32:31,526 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 142 [2022-12-13 00:32:31,527 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 96 transitions, 326 flow [2022-12-13 00:32:31,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 00:32:31,527 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 00:32:31,527 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 00:32:31,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 00:32:31,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 00:32:31,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 00:32:31,528 INFO L85 PathProgramCache]: Analyzing trace with hash 566570295, now seen corresponding path program 1 times [2022-12-13 00:32:31,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 00:32:31,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886937631] [2022-12-13 00:32:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 00:32:31,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 00:32:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 00:32:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 00:32:31,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 00:32:31,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886937631] [2022-12-13 00:32:31,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886937631] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 00:32:31,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 00:32:31,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 00:32:31,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388657702] [2022-12-13 00:32:31,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 00:32:31,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 00:32:31,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 00:32:31,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 00:32:31,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 00:32:31,660 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 68 [2022-12-13 00:32:31,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 96 transitions, 326 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 00:32:31,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 00:32:31,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 68 [2022-12-13 00:32:31,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 00:32:38,553 INFO L130 PetriNetUnfolder]: 63363/94079 cut-off events. [2022-12-13 00:32:38,553 INFO L131 PetriNetUnfolder]: For 29811/33891 co-relation queries the response was YES. [2022-12-13 00:32:38,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214671 conditions, 94079 events. 63363/94079 cut-off events. For 29811/33891 co-relation queries the response was YES. Maximal size of possible extension queue 6444. Compared 800273 event pairs, 20760 based on Foata normal form. 5236/59563 useless extension candidates. Maximal degree in co-relation 153335. Up to 53447 conditions per place. [2022-12-13 00:32:39,186 INFO L137 encePairwiseOnDemand]: 58/68 looper letters, 80 selfloop transitions, 8 changer transitions 0/133 dead transitions. [2022-12-13 00:32:39,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 133 transitions, 613 flow [2022-12-13 00:32:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 00:32:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 00:32:39,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2022-12-13 00:32:39,189 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7254901960784313 [2022-12-13 00:32:39,189 INFO L175 Difference]: Start difference. First operand has 87 places, 96 transitions, 326 flow. Second operand 3 states and 148 transitions. [2022-12-13 00:32:39,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 133 transitions, 613 flow [2022-12-13 00:32:39,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 133 transitions, 613 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 00:32:39,732 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 354 flow [2022-12-13 00:32:39,733 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=354, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2022-12-13 00:32:39,733 INFO L295 CegarLoopForPetriNet]: 82 programPoint places, 8 predicate places. [2022-12-13 00:32:39,733 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 00:32:39,733 INFO L89 Accepts]: Start accepts. Operand has 90 places, 96 transitions, 354 flow [2022-12-13 00:32:39,734 INFO L95 Accepts]: Finished accepts. [2022-12-13 00:32:39,734 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 00:32:39,734 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 96 transitions, 354 flow [2022-12-13 00:32:39,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 96 transitions, 354 flow [2022-12-13 00:32:39,876 INFO L130 PetriNetUnfolder]: 477/2316 cut-off events. [2022-12-13 00:32:39,876 INFO L131 PetriNetUnfolder]: For 317/332 co-relation queries the response was YES. [2022-12-13 00:32:39,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4260 conditions, 2316 events. 477/2316 cut-off events. For 317/332 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25595 event pairs, 159 based on Foata normal form. 0/1453 useless extension candidates. Maximal degree in co-relation 4229. Up to 386 conditions per place. [2022-12-13 00:32:39,915 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 96 transitions, 354 flow [2022-12-13 00:32:39,916 INFO L226 LiptonReduction]: Number of co-enabled transitions 3660 [2022-12-13 00:32:39,946 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 00:32:39,947 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 214 [2022-12-13 00:32:39,948 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 354 flow [2022-12-13 00:32:39,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 00:32:39,948 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 00:32:39,948 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 00:32:39,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 00:32:39,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 00:32:39,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 00:32:39,949 INFO L85 PathProgramCache]: Analyzing trace with hash -281213599, now seen corresponding path program 2 times [2022-12-13 00:32:39,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 00:32:39,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667863888] [2022-12-13 00:32:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 00:32:39,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 00:32:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 00:32:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 00:32:40,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 00:32:40,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667863888] [2022-12-13 00:32:40,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667863888] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 00:32:40,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 00:32:40,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 00:32:40,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834322036] [2022-12-13 00:32:40,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 00:32:40,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 00:32:40,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 00:32:40,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 00:32:40,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 00:32:40,168 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 68 [2022-12-13 00:32:40,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 354 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 00:32:40,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 00:32:40,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 68 [2022-12-13 00:32:40,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 00:32:45,218 INFO L130 PetriNetUnfolder]: 36328/63755 cut-off events. [2022-12-13 00:32:45,219 INFO L131 PetriNetUnfolder]: For 40248/41995 co-relation queries the response was YES. [2022-12-13 00:32:45,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159227 conditions, 63755 events. 36328/63755 cut-off events. For 40248/41995 co-relation queries the response was YES. Maximal size of possible extension queue 5784. Compared 665929 event pairs, 8837 based on Foata normal form. 3606/41880 useless extension candidates. Maximal degree in co-relation 130604. Up to 23834 conditions per place. [2022-12-13 00:32:45,608 INFO L137 encePairwiseOnDemand]: 57/68 looper letters, 93 selfloop transitions, 17 changer transitions 25/179 dead transitions. [2022-12-13 00:32:45,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 179 transitions, 878 flow [2022-12-13 00:32:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 00:32:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 00:32:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 214 transitions. [2022-12-13 00:32:45,610 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7867647058823529 [2022-12-13 00:32:45,610 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 354 flow. Second operand 4 states and 214 transitions. [2022-12-13 00:32:45,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 179 transitions, 878 flow [2022-12-13 00:32:46,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 179 transitions, 850 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 00:32:46,178 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 429 flow [2022-12-13 00:32:46,178 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=429, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2022-12-13 00:32:46,180 INFO L295 CegarLoopForPetriNet]: 82 programPoint places, 12 predicate places. [2022-12-13 00:32:46,181 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 00:32:46,181 INFO L89 Accepts]: Start accepts. Operand has 94 places, 101 transitions, 429 flow [2022-12-13 00:32:46,183 INFO L95 Accepts]: Finished accepts. [2022-12-13 00:32:46,184 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 00:32:46,184 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 101 transitions, 429 flow [2022-12-13 00:32:46,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 101 transitions, 429 flow [2022-12-13 00:32:46,627 INFO L130 PetriNetUnfolder]: 1239/5760 cut-off events. [2022-12-13 00:32:46,627 INFO L131 PetriNetUnfolder]: For 2994/3305 co-relation queries the response was YES. [2022-12-13 00:32:46,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13204 conditions, 5760 events. 1239/5760 cut-off events. For 2994/3305 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 76240 event pairs, 24 based on Foata normal form. 0/3543 useless extension candidates. Maximal degree in co-relation 13172. Up to 1342 conditions per place. [2022-12-13 00:32:46,711 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 101 transitions, 429 flow [2022-12-13 00:32:46,711 INFO L226 LiptonReduction]: Number of co-enabled transitions 3088 [2022-12-13 00:32:46,763 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 00:32:46,764 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 583 [2022-12-13 00:32:46,764 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 101 transitions, 429 flow [2022-12-13 00:32:46,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 00:32:46,765 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 00:32:46,765 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 00:32:46,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 00:32:46,765 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 00:32:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 00:32:46,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1347845057, now seen corresponding path program 1 times [2022-12-13 00:32:46,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 00:32:46,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867285203] [2022-12-13 00:32:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 00:32:46,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 00:32:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 00:32:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 00:32:46,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 00:32:46,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867285203] [2022-12-13 00:32:46,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867285203] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 00:32:46,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 00:32:46,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 00:32:46,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519821986] [2022-12-13 00:32:46,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 00:32:46,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 00:32:46,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 00:32:46,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 00:32:46,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 00:32:46,861 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 65 [2022-12-13 00:32:46,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 101 transitions, 429 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 00:32:46,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 00:32:46,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 65 [2022-12-13 00:32:46,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 00:32:54,416 INFO L130 PetriNetUnfolder]: 59573/98657 cut-off events. [2022-12-13 00:32:54,417 INFO L131 PetriNetUnfolder]: For 75328/75692 co-relation queries the response was YES. [2022-12-13 00:32:54,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282039 conditions, 98657 events. 59573/98657 cut-off events. For 75328/75692 co-relation queries the response was YES. Maximal size of possible extension queue 5022. Compared 926645 event pairs, 7066 based on Foata normal form. 364/72385 useless extension candidates. Maximal degree in co-relation 247391. Up to 43873 conditions per place. [2022-12-13 00:32:55,002 INFO L137 encePairwiseOnDemand]: 54/65 looper letters, 196 selfloop transitions, 44 changer transitions 79/332 dead transitions. [2022-12-13 00:32:55,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 332 transitions, 2053 flow [2022-12-13 00:32:55,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 00:32:55,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 00:32:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 366 transitions. [2022-12-13 00:32:55,004 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6256410256410256 [2022-12-13 00:32:55,004 INFO L175 Difference]: Start difference. First operand has 91 places, 101 transitions, 429 flow. Second operand 9 states and 366 transitions. [2022-12-13 00:32:55,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 332 transitions, 2053 flow [2022-12-13 00:32:56,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 332 transitions, 2053 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 00:32:56,280 INFO L231 Difference]: Finished difference. Result has 106 places, 126 transitions, 748 flow [2022-12-13 00:32:56,281 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=748, PETRI_PLACES=106, PETRI_TRANSITIONS=126} [2022-12-13 00:32:56,283 INFO L295 CegarLoopForPetriNet]: 82 programPoint places, 24 predicate places. [2022-12-13 00:32:56,283 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 00:32:56,283 INFO L89 Accepts]: Start accepts. Operand has 106 places, 126 transitions, 748 flow [2022-12-13 00:32:56,288 INFO L95 Accepts]: Finished accepts. [2022-12-13 00:32:56,289 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 00:32:56,289 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 126 transitions, 748 flow [2022-12-13 00:32:56,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 126 transitions, 748 flow [2022-12-13 00:32:56,868 INFO L130 PetriNetUnfolder]: 1370/6242 cut-off events. [2022-12-13 00:32:56,868 INFO L131 PetriNetUnfolder]: For 8026/8290 co-relation queries the response was YES. [2022-12-13 00:32:56,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17755 conditions, 6242 events. 1370/6242 cut-off events. For 8026/8290 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 80642 event pairs, 9 based on Foata normal form. 0/4479 useless extension candidates. Maximal degree in co-relation 17714. Up to 1362 conditions per place. [2022-12-13 00:32:56,938 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 126 transitions, 748 flow [2022-12-13 00:32:56,938 INFO L226 LiptonReduction]: Number of co-enabled transitions 3260 [2022-12-13 00:32:56,956 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 00:32:56,957 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 674 [2022-12-13 00:32:56,957 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 126 transitions, 748 flow [2022-12-13 00:32:56,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 00:32:56,957 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 00:32:56,957 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 00:32:56,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 00:32:56,958 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 00:32:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 00:32:56,958 INFO L85 PathProgramCache]: Analyzing trace with hash -708199959, now seen corresponding path program 1 times [2022-12-13 00:32:56,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 00:32:56,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130844971] [2022-12-13 00:32:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 00:32:56,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 00:32:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 00:32:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 00:32:57,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 00:32:57,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130844971] [2022-12-13 00:32:57,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130844971] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 00:32:57,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 00:32:57,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 00:32:57,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971883373] [2022-12-13 00:32:57,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 00:32:57,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 00:32:57,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 00:32:57,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 00:32:57,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 00:32:57,024 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 65 [2022-12-13 00:32:57,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 126 transitions, 748 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 00:32:57,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 00:32:57,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 65 [2022-12-13 00:32:57,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 00:33:04,205 INFO L130 PetriNetUnfolder]: 49710/85752 cut-off events. [2022-12-13 00:33:04,206 INFO L131 PetriNetUnfolder]: For 104865/105133 co-relation queries the response was YES. [2022-12-13 00:33:04,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272223 conditions, 85752 events. 49710/85752 cut-off events. For 104865/105133 co-relation queries the response was YES. Maximal size of possible extension queue 4721. Compared 839201 event pairs, 9070 based on Foata normal form. 794/68097 useless extension candidates. Maximal degree in co-relation 250285. Up to 40015 conditions per place. [2022-12-13 00:33:04,713 INFO L137 encePairwiseOnDemand]: 54/65 looper letters, 171 selfloop transitions, 48 changer transitions 76/308 dead transitions. [2022-12-13 00:33:04,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 308 transitions, 2151 flow [2022-12-13 00:33:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 00:33:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 00:33:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 352 transitions. [2022-12-13 00:33:04,728 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6017094017094017 [2022-12-13 00:33:04,728 INFO L175 Difference]: Start difference. First operand has 106 places, 126 transitions, 748 flow. Second operand 9 states and 352 transitions. [2022-12-13 00:33:04,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 308 transitions, 2151 flow [2022-12-13 00:33:07,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 308 transitions, 2135 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-12-13 00:33:07,183 INFO L231 Difference]: Finished difference. Result has 117 places, 134 transitions, 926 flow [2022-12-13 00:33:07,184 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=926, PETRI_PLACES=117, PETRI_TRANSITIONS=134} [2022-12-13 00:33:07,186 INFO L295 CegarLoopForPetriNet]: 82 programPoint places, 35 predicate places. [2022-12-13 00:33:07,187 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 00:33:07,187 INFO L89 Accepts]: Start accepts. Operand has 117 places, 134 transitions, 926 flow [2022-12-13 00:33:07,189 INFO L95 Accepts]: Finished accepts. [2022-12-13 00:33:07,189 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 00:33:07,189 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 134 transitions, 926 flow [2022-12-13 00:33:07,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 134 transitions, 926 flow [2022-12-13 00:33:07,597 INFO L130 PetriNetUnfolder]: 1218/5811 cut-off events. [2022-12-13 00:33:07,597 INFO L131 PetriNetUnfolder]: For 9478/9649 co-relation queries the response was YES. [2022-12-13 00:33:07,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17533 conditions, 5811 events. 1218/5811 cut-off events. For 9478/9649 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 74875 event pairs, 0 based on Foata normal form. 70/4297 useless extension candidates. Maximal degree in co-relation 17487. Up to 1173 conditions per place. [2022-12-13 00:33:07,685 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 134 transitions, 926 flow [2022-12-13 00:33:07,685 INFO L226 LiptonReduction]: Number of co-enabled transitions 3216 [2022-12-13 00:33:07,711 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 00:33:07,712 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 525 [2022-12-13 00:33:07,713 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 134 transitions, 926 flow [2022-12-13 00:33:07,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 00:33:07,713 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 00:33:07,713 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 00:33:07,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 00:33:07,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 00:33:07,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 00:33:07,714 INFO L85 PathProgramCache]: Analyzing trace with hash -722932578, now seen corresponding path program 1 times [2022-12-13 00:33:07,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 00:33:07,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56172199] [2022-12-13 00:33:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 00:33:07,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 00:33:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 00:33:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 00:33:07,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 00:33:07,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56172199] [2022-12-13 00:33:07,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56172199] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 00:33:07,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 00:33:07,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 00:33:07,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081068410] [2022-12-13 00:33:07,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 00:33:07,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 00:33:07,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 00:33:07,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 00:33:07,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 00:33:07,803 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 65 [2022-12-13 00:33:07,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 134 transitions, 926 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 00:33:07,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 00:33:07,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 65 [2022-12-13 00:33:07,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 00:33:14,492 INFO L130 PetriNetUnfolder]: 41566/72368 cut-off events. [2022-12-13 00:33:14,492 INFO L131 PetriNetUnfolder]: For 105512/105594 co-relation queries the response was YES. [2022-12-13 00:33:14,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236888 conditions, 72368 events. 41566/72368 cut-off events. For 105512/105594 co-relation queries the response was YES. Maximal size of possible extension queue 3768. Compared 701904 event pairs, 8652 based on Foata normal form. 620/57256 useless extension candidates. Maximal degree in co-relation 234118. Up to 37031 conditions per place. [2022-12-13 00:33:15,033 INFO L137 encePairwiseOnDemand]: 54/65 looper letters, 169 selfloop transitions, 50 changer transitions 51/283 dead transitions. [2022-12-13 00:33:15,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 283 transitions, 2102 flow [2022-12-13 00:33:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 00:33:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 00:33:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 312 transitions. [2022-12-13 00:33:15,035 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6 [2022-12-13 00:33:15,035 INFO L175 Difference]: Start difference. First operand has 116 places, 134 transitions, 926 flow. Second operand 8 states and 312 transitions. [2022-12-13 00:33:15,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 283 transitions, 2102 flow [2022-12-13 00:33:18,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 283 transitions, 2047 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-12-13 00:33:18,874 INFO L231 Difference]: Finished difference. Result has 123 places, 137 transitions, 1048 flow [2022-12-13 00:33:18,874 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1048, PETRI_PLACES=123, PETRI_TRANSITIONS=137} [2022-12-13 00:33:18,875 INFO L295 CegarLoopForPetriNet]: 82 programPoint places, 41 predicate places. [2022-12-13 00:33:18,875 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 00:33:18,875 INFO L89 Accepts]: Start accepts. Operand has 123 places, 137 transitions, 1048 flow [2022-12-13 00:33:18,876 INFO L95 Accepts]: Finished accepts. [2022-12-13 00:33:18,877 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 00:33:18,877 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 137 transitions, 1048 flow [2022-12-13 00:33:18,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 137 transitions, 1048 flow [2022-12-13 00:33:19,270 INFO L130 PetriNetUnfolder]: 1186/5755 cut-off events. [2022-12-13 00:33:19,270 INFO L131 PetriNetUnfolder]: For 9911/10098 co-relation queries the response was YES. [2022-12-13 00:33:19,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18257 conditions, 5755 events. 1186/5755 cut-off events. For 9911/10098 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 73908 event pairs, 0 based on Foata normal form. 86/4251 useless extension candidates. Maximal degree in co-relation 18212. Up to 1137 conditions per place. [2022-12-13 00:33:19,316 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 137 transitions, 1048 flow [2022-12-13 00:33:19,317 INFO L226 LiptonReduction]: Number of co-enabled transitions 2930 [2022-12-13 00:33:19,334 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 00:33:19,334 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 459 [2022-12-13 00:33:19,334 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 137 transitions, 1048 flow [2022-12-13 00:33:19,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 00:33:19,335 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 00:33:19,335 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 00:33:19,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 00:33:19,335 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 00:33:19,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 00:33:19,335 INFO L85 PathProgramCache]: Analyzing trace with hash -527585354, now seen corresponding path program 1 times [2022-12-13 00:33:19,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 00:33:19,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70332522] [2022-12-13 00:33:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 00:33:19,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 00:33:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 00:33:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 00:33:19,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 00:33:19,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70332522] [2022-12-13 00:33:19,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70332522] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 00:33:19,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 00:33:19,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 00:33:19,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381744346] [2022-12-13 00:33:19,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 00:33:19,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 00:33:19,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 00:33:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 00:33:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 00:33:19,419 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 59 [2022-12-13 00:33:19,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 137 transitions, 1048 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 00:33:19,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 00:33:19,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 59 [2022-12-13 00:33:19,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 00:33:22,924 INFO L130 PetriNetUnfolder]: 17984/38729 cut-off events. [2022-12-13 00:33:22,925 INFO L131 PetriNetUnfolder]: For 81125/82363 co-relation queries the response was YES. [2022-12-13 00:33:23,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132295 conditions, 38729 events. 17984/38729 cut-off events. For 81125/82363 co-relation queries the response was YES. Maximal size of possible extension queue 3431. Compared 459322 event pairs, 6010 based on Foata normal form. 1817/28718 useless extension candidates. Maximal degree in co-relation 122047. Up to 14926 conditions per place. [2022-12-13 00:33:23,223 INFO L137 encePairwiseOnDemand]: 47/59 looper letters, 75 selfloop transitions, 19 changer transitions 57/222 dead transitions. [2022-12-13 00:33:23,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 222 transitions, 1711 flow [2022-12-13 00:33:23,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 00:33:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 00:33:23,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 303 transitions. [2022-12-13 00:33:23,225 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5706214689265536 [2022-12-13 00:33:23,225 INFO L175 Difference]: Start difference. First operand has 116 places, 137 transitions, 1048 flow. Second operand 9 states and 303 transitions. [2022-12-13 00:33:23,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 222 transitions, 1711 flow [2022-12-13 00:33:24,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 222 transitions, 1615 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 00:33:24,761 INFO L231 Difference]: Finished difference. Result has 123 places, 133 transitions, 960 flow [2022-12-13 00:33:24,761 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=960, PETRI_PLACES=123, PETRI_TRANSITIONS=133} [2022-12-13 00:33:24,762 INFO L295 CegarLoopForPetriNet]: 82 programPoint places, 41 predicate places. [2022-12-13 00:33:24,762 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 00:33:24,762 INFO L89 Accepts]: Start accepts. Operand has 123 places, 133 transitions, 960 flow [2022-12-13 00:33:24,763 INFO L95 Accepts]: Finished accepts. [2022-12-13 00:33:24,764 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 00:33:24,764 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 133 transitions, 960 flow [2022-12-13 00:33:24,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 133 transitions, 960 flow [2022-12-13 00:33:25,228 INFO L130 PetriNetUnfolder]: 1130/5224 cut-off events. [2022-12-13 00:33:25,228 INFO L131 PetriNetUnfolder]: For 8075/8214 co-relation queries the response was YES. [2022-12-13 00:33:25,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17863 conditions, 5224 events. 1130/5224 cut-off events. For 8075/8214 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 65214 event pairs, 0 based on Foata normal form. 71/3882 useless extension candidates. Maximal degree in co-relation 17815. Up to 1137 conditions per place. [2022-12-13 00:33:25,285 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 133 transitions, 960 flow [2022-12-13 00:33:25,286 INFO L226 LiptonReduction]: Number of co-enabled transitions 2710 [2022-12-13 00:33:25,298 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [219] L728-->L731: Formula: (= |v_readerThread1of1ForFork2_~l~0#1_5| v_~y~0_1) InVars {readerThread1of1ForFork2_~l~0#1=|v_readerThread1of1ForFork2_~l~0#1_5|} OutVars{~y~0=v_~y~0_1, readerThread1of1ForFork2_~l~0#1=|v_readerThread1of1ForFork2_~l~0#1_5|} AuxVars[] AssignedVars[~y~0] and [253] L714-1-->L717: Formula: (= 3 v_~x~0_4) InVars {} OutVars{~x~0=v_~x~0_4} AuxVars[] AssignedVars[~x~0] [2022-12-13 00:33:25,307 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [219] L728-->L731: Formula: (= |v_readerThread1of1ForFork2_~l~0#1_5| v_~y~0_1) InVars {readerThread1of1ForFork2_~l~0#1=|v_readerThread1of1ForFork2_~l~0#1_5|} OutVars{~y~0=v_~y~0_1, readerThread1of1ForFork2_~l~0#1=|v_readerThread1of1ForFork2_~l~0#1_5|} AuxVars[] AssignedVars[~y~0] and [247] L714-1-->L717: Formula: (= 3 v_~x~0_4) InVars {} OutVars{~x~0=v_~x~0_4} AuxVars[] AssignedVars[~x~0] [2022-12-13 00:33:25,456 INFO L241 LiptonReduction]: Total number of compositions: 2 [2022-12-13 00:33:25,457 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 695 [2022-12-13 00:33:25,457 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 133 transitions, 991 flow [2022-12-13 00:33:25,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 00:33:25,458 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 00:33:25,458 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 00:33:25,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 00:33:25,458 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 00:33:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 00:33:25,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1920491190, now seen corresponding path program 2 times [2022-12-13 00:33:25,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 00:33:25,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185330409] [2022-12-13 00:33:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 00:33:25,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 00:33:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 00:33:25,484 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 00:33:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 00:33:25,519 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 00:33:25,519 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 00:33:25,520 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2022-12-13 00:33:25,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-12-13 00:33:25,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-12-13 00:33:25,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2022-12-13 00:33:25,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-12-13 00:33:25,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2022-12-13 00:33:25,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-12-13 00:33:25,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 00:33:25,524 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2022-12-13 00:33:25,529 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 00:33:25,530 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 00:33:25,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 12:33:25 BasicIcfg [2022-12-13 00:33:25,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 00:33:25,591 INFO L158 Benchmark]: Toolchain (without parser) took 70598.56ms. Allocated memory was 180.4MB in the beginning and 7.7GB in the end (delta: 7.5GB). Free memory was 133.1MB in the beginning and 4.8GB in the end (delta: -4.7GB). Peak memory consumption was 2.8GB. Max. memory is 8.0GB. [2022-12-13 00:33:25,591 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 127.9MB. Free memory is still 105.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-13 00:33:25,591 INFO L158 Benchmark]: CACSL2BoogieTranslator took 578.35ms. Allocated memory is still 180.4MB. Free memory was 132.7MB in the beginning and 147.4MB in the end (delta: -14.6MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2022-12-13 00:33:25,591 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.99ms. Allocated memory is still 180.4MB. Free memory was 147.4MB in the beginning and 145.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-13 00:33:25,592 INFO L158 Benchmark]: Boogie Preprocessor took 37.62ms. Allocated memory is still 180.4MB. Free memory was 144.8MB in the beginning and 143.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-13 00:33:25,592 INFO L158 Benchmark]: RCFGBuilder took 578.21ms. Allocated memory is still 180.4MB. Free memory was 143.7MB in the beginning and 127.5MB in the end (delta: 16.3MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2022-12-13 00:33:25,592 INFO L158 Benchmark]: TraceAbstraction took 69329.18ms. Allocated memory was 180.4MB in the beginning and 7.7GB in the end (delta: 7.5GB). Free memory was 126.4MB in the beginning and 4.8GB in the end (delta: -4.7GB). Peak memory consumption was 2.8GB. Max. memory is 8.0GB. [2022-12-13 00:33:25,593 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 127.9MB. Free memory is still 105.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 578.35ms. Allocated memory is still 180.4MB. Free memory was 132.7MB in the beginning and 147.4MB in the end (delta: -14.6MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 64.99ms. Allocated memory is still 180.4MB. Free memory was 147.4MB in the beginning and 145.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.62ms. Allocated memory is still 180.4MB. Free memory was 144.8MB in the beginning and 143.7MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 578.21ms. Allocated memory is still 180.4MB. Free memory was 143.7MB in the beginning and 127.5MB in the end (delta: 16.3MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 69329.18ms. Allocated memory was 180.4MB in the beginning and 7.7GB in the end (delta: 7.5GB). Free memory was 126.4MB in the beginning and 4.8GB in the end (delta: -4.7GB). Peak memory consumption was 2.8GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.6s, 104 PlacesBefore, 82 PlacesAfterwards, 93 TransitionsBefore, 73 TransitionsAfterwards, 2574 CoEnabledTransitionPairs, 5 FixpointIterations, 0 TrivialSequentialCompositions, 11 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 35 ConcurrentYvCompositions, 2 ChoiceCompositions, 67 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 7687, independent: 7397, independent conditional: 7397, independent unconditional: 0, dependent: 290, dependent conditional: 290, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 7687, independent: 7397, independent conditional: 0, independent unconditional: 7397, dependent: 290, dependent conditional: 0, dependent unconditional: 290, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 7687, independent: 7397, independent conditional: 0, independent unconditional: 7397, dependent: 290, dependent conditional: 0, dependent unconditional: 290, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 7687, independent: 7397, independent conditional: 0, independent unconditional: 7397, dependent: 290, dependent conditional: 0, dependent unconditional: 290, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2510, independent: 2456, independent conditional: 0, independent unconditional: 2456, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2510, independent: 2392, independent conditional: 0, independent unconditional: 2392, dependent: 118, dependent conditional: 0, dependent unconditional: 118, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 118, independent: 64, independent conditional: 0, independent unconditional: 64, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 169, independent: 52, independent conditional: 0, independent unconditional: 52, dependent: 117, dependent conditional: 0, dependent unconditional: 117, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 7687, independent: 4941, independent conditional: 0, independent unconditional: 4941, dependent: 236, dependent conditional: 0, dependent unconditional: 236, unknown: 2510, unknown conditional: 0, unknown unconditional: 2510] , Statistics on independence cache: Total cache size (in pairs): 5685, Positive cache size: 5631, Positive conditional cache size: 0, Positive unconditional cache size: 5631, Negative cache size: 54, Negative conditional cache size: 0, Negative unconditional cache size: 54, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.0s, 87 PlacesBefore, 87 PlacesAfterwards, 96 TransitionsBefore, 96 TransitionsAfterwards, 3878 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 654, independent: 602, independent conditional: 602, independent unconditional: 0, dependent: 52, dependent conditional: 52, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 654, independent: 602, independent conditional: 214, independent unconditional: 388, dependent: 52, dependent conditional: 26, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 654, independent: 602, independent conditional: 51, independent unconditional: 551, dependent: 52, dependent conditional: 26, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 654, independent: 602, independent conditional: 51, independent unconditional: 551, dependent: 52, dependent conditional: 26, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 112, independent: 93, independent conditional: 6, independent unconditional: 87, dependent: 19, dependent conditional: 10, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 112, independent: 90, independent conditional: 0, independent unconditional: 90, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 22, independent: 3, independent conditional: 0, independent unconditional: 3, dependent: 19, dependent conditional: 10, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 30, independent: 6, independent conditional: 0, independent unconditional: 6, dependent: 23, dependent conditional: 9, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 654, independent: 509, independent conditional: 45, independent unconditional: 464, dependent: 33, dependent conditional: 16, dependent unconditional: 17, unknown: 112, unknown conditional: 16, unknown unconditional: 96] , Statistics on independence cache: Total cache size (in pairs): 112, Positive cache size: 93, Positive conditional cache size: 6, Positive unconditional cache size: 87, Negative cache size: 19, Negative conditional cache size: 10, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 163, Maximal queried relation: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.0s, 90 PlacesBefore, 90 PlacesAfterwards, 96 TransitionsBefore, 96 TransitionsAfterwards, 3660 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 833, independent: 787, independent conditional: 787, independent unconditional: 0, dependent: 46, dependent conditional: 46, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 833, independent: 787, independent conditional: 155, independent unconditional: 632, dependent: 46, dependent conditional: 17, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 833, independent: 787, independent conditional: 70, independent unconditional: 717, dependent: 46, dependent conditional: 17, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 833, independent: 787, independent conditional: 70, independent unconditional: 717, dependent: 46, dependent conditional: 17, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 108, independent: 102, independent conditional: 4, independent unconditional: 98, dependent: 6, dependent conditional: 2, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 108, independent: 102, independent conditional: 0, independent unconditional: 102, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 6, dependent conditional: 2, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 8, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 8, dependent conditional: 2, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 833, independent: 685, independent conditional: 66, independent unconditional: 619, dependent: 40, dependent conditional: 15, dependent unconditional: 25, unknown: 108, unknown conditional: 6, unknown unconditional: 102] , Statistics on independence cache: Total cache size (in pairs): 220, Positive cache size: 195, Positive conditional cache size: 10, Positive unconditional cache size: 185, Negative cache size: 25, Negative conditional cache size: 12, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 85, Maximal queried relation: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 91 PlacesBefore, 91 PlacesAfterwards, 101 TransitionsBefore, 101 TransitionsAfterwards, 3088 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 417, independent: 389, independent conditional: 389, independent unconditional: 0, dependent: 28, dependent conditional: 28, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 417, independent: 389, independent conditional: 54, independent unconditional: 335, dependent: 28, dependent conditional: 17, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 417, independent: 389, independent conditional: 25, independent unconditional: 364, dependent: 28, dependent conditional: 17, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 417, independent: 389, independent conditional: 25, independent unconditional: 364, dependent: 28, dependent conditional: 17, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 65, independent: 57, independent conditional: 6, independent unconditional: 51, dependent: 8, dependent conditional: 7, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 65, independent: 57, independent conditional: 0, independent unconditional: 57, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 8, dependent conditional: 7, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 14, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 14, dependent conditional: 13, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 417, independent: 332, independent conditional: 19, independent unconditional: 313, dependent: 20, dependent conditional: 10, dependent unconditional: 10, unknown: 65, unknown conditional: 13, unknown unconditional: 52] , Statistics on independence cache: Total cache size (in pairs): 285, Positive cache size: 252, Positive conditional cache size: 16, Positive unconditional cache size: 236, Negative cache size: 33, Negative conditional cache size: 19, Negative unconditional cache size: 14, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 29, Maximal queried relation: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.0s, 106 PlacesBefore, 106 PlacesAfterwards, 126 TransitionsBefore, 126 TransitionsAfterwards, 3260 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 150, independent: 144, independent conditional: 144, independent unconditional: 0, dependent: 6, dependent conditional: 6, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 150, independent: 144, independent conditional: 9, independent unconditional: 135, dependent: 6, dependent conditional: 3, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 150, independent: 144, independent conditional: 9, independent unconditional: 135, dependent: 6, dependent conditional: 3, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 150, independent: 144, independent conditional: 9, independent unconditional: 135, dependent: 6, dependent conditional: 3, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 13, independent: 12, independent conditional: 3, independent unconditional: 9, dependent: 1, dependent conditional: 1, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 13, independent: 12, independent conditional: 0, independent unconditional: 12, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 1, dependent conditional: 1, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 1, dependent conditional: 1, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 150, independent: 132, independent conditional: 6, independent unconditional: 126, dependent: 5, dependent conditional: 2, dependent unconditional: 3, unknown: 13, unknown conditional: 4, unknown unconditional: 9] , Statistics on independence cache: Total cache size (in pairs): 298, Positive cache size: 264, Positive conditional cache size: 19, Positive unconditional cache size: 245, Negative cache size: 34, Negative conditional cache size: 20, Negative unconditional cache size: 14, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.0s, 116 PlacesBefore, 116 PlacesAfterwards, 134 TransitionsBefore, 134 TransitionsAfterwards, 3216 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 186, independent: 179, independent conditional: 179, independent unconditional: 0, dependent: 7, dependent conditional: 7, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 186, independent: 179, independent conditional: 12, independent unconditional: 167, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 186, independent: 179, independent conditional: 12, independent unconditional: 167, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 186, independent: 179, independent conditional: 12, independent unconditional: 167, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 6, independent: 5, independent conditional: 0, independent unconditional: 5, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 6, independent: 5, independent conditional: 0, independent unconditional: 5, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 186, independent: 174, independent conditional: 12, independent unconditional: 162, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 6, unknown conditional: 0, unknown unconditional: 6] , Statistics on independence cache: Total cache size (in pairs): 304, Positive cache size: 269, Positive conditional cache size: 19, Positive unconditional cache size: 250, Negative cache size: 35, Negative conditional cache size: 20, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.0s, 116 PlacesBefore, 116 PlacesAfterwards, 137 TransitionsBefore, 137 TransitionsAfterwards, 2930 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 108, independent: 100, independent conditional: 100, independent unconditional: 0, dependent: 8, dependent conditional: 8, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 108, independent: 100, independent conditional: 0, independent unconditional: 100, dependent: 8, dependent conditional: 4, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 112, independent: 100, independent conditional: 0, independent unconditional: 100, dependent: 12, dependent conditional: 8, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 112, independent: 100, independent conditional: 0, independent unconditional: 100, dependent: 12, dependent conditional: 8, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 1, dependent conditional: 1, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 1, dependent conditional: 1, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 1, dependent conditional: 1, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 112, independent: 100, independent conditional: 0, independent unconditional: 100, dependent: 11, dependent conditional: 7, dependent unconditional: 4, unknown: 1, unknown conditional: 1, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 305, Positive cache size: 269, Positive conditional cache size: 19, Positive unconditional cache size: 250, Negative cache size: 36, Negative conditional cache size: 21, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: 1 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.2s, 118 PlacesBefore, 118 PlacesAfterwards, 133 TransitionsBefore, 133 TransitionsAfterwards, 2710 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 265, independent: 249, independent conditional: 249, independent unconditional: 0, dependent: 16, dependent conditional: 16, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 265, independent: 249, independent conditional: 137, independent unconditional: 112, dependent: 16, dependent conditional: 16, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 289, independent: 249, independent conditional: 99, independent unconditional: 150, dependent: 40, dependent conditional: 40, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 289, independent: 249, independent conditional: 99, independent unconditional: 150, dependent: 40, dependent conditional: 40, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 46, independent: 44, independent conditional: 25, independent unconditional: 19, dependent: 2, dependent conditional: 2, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 46, independent: 44, independent conditional: 0, independent unconditional: 44, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 2, dependent conditional: 2, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 5, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 5, dependent conditional: 5, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 289, independent: 205, independent conditional: 74, independent unconditional: 131, dependent: 38, dependent conditional: 38, dependent unconditional: 0, unknown: 46, unknown conditional: 27, unknown unconditional: 19] , Statistics on independence cache: Total cache size (in pairs): 353, Positive cache size: 315, Positive conditional cache size: 44, Positive unconditional cache size: 271, Negative cache size: 38, Negative conditional cache size: 23, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 38, Maximal queried relation: 2 - CounterExampleResult [Line: 738]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [pthread_create(&t1, 0, writer, 0)=-3, r=0, t1={5:0}, t2={7:0}, t3={6:0}, t4={8:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [pthread_create(&t2, 0, reader, 0)=-2, r=0, t1={5:0}, t2={7:0}, t3={6:0}, t4={8:0}, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [pthread_create(&t3, 0, writer, 0)=-1, r=0, t1={5:0}, t2={7:0}, t3={6:0}, t4={8:0}, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [pthread_create(&t4, 0, reader, 0)=0, r=0, t1={5:0}, t2={7:0}, t3={6:0}, t4={8:0}, w=0, x=0, y=0] [L724] 2 int l; [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L724] 4 int l; [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L727] 4 l = x VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L730] 4 y = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L743] 2 r = l [L745] 2 return 0; [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L733] 4 int ly = y; VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; [L738] COND TRUE 4 !(ly == lx) [L738] 4 reach_error() VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 135 locations, 7 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: 69.1s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 60.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 883 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 883 mSDsluCounter, 127 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 51 mSDsCounter, 35 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2332 IncrementalHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 35 mSolverCounterUnsat, 76 mSDtfsCounter, 2332 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1048occurred in iteration=6, InterpolantAutomatonStates: 51, 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, 0.7s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 177 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 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 proved your program to be incorrect! [2022-12-13 00:33:25,614 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...