/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-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 21:01:50,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 21:01:50,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 21:01:50,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 21:01:50,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 21:01:50,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 21:01:50,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 21:01:50,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 21:01:50,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 21:01:50,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 21:01:50,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 21:01:50,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 21:01:50,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 21:01:50,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 21:01:50,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 21:01:50,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 21:01:50,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 21:01:50,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 21:01:50,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 21:01:50,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 21:01:50,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 21:01:50,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 21:01:50,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 21:01:50,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 21:01:50,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 21:01:50,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 21:01:50,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 21:01:50,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 21:01:50,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 21:01:50,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 21:01:50,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 21:01:50,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 21:01:50,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 21:01:50,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 21:01:50,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 21:01:50,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 21:01:50,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 21:01:50,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 21:01:50,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 21:01:50,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 21:01:50,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 21:01:50,674 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-SemanticLbe.epf [2022-12-12 21:01:50,702 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 21:01:50,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 21:01:50,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 21:01:50,704 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 21:01:50,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 21:01:50,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 21:01:50,705 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 21:01:50,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 21:01:50,705 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 21:01:50,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 21:01:50,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 21:01:50,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 21:01:50,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 21:01:50,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 21:01:50,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 21:01:50,706 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 21:01:50,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 21:01:50,707 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 21:01:50,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 21:01:50,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 21:01:50,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 21:01:50,707 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 21:01:50,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 21:01:50,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 21:01:50,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 21:01:50,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 21:01:50,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 21:01:50,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 21:01:50,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 21:01:50,708 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 21:01:50,708 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-12 21:01:50,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 21:01:51,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 21:01:51,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 21:01:51,017 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 21:01:51,019 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 21:01:51,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2022-12-12 21:01:52,061 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 21:01:52,343 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 21:01:52,344 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2022-12-12 21:01:52,352 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca6e1da2e/e3a6dec6fd9147ffbc92608a76ae579f/FLAG0d127f8c5 [2022-12-12 21:01:52,362 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca6e1da2e/e3a6dec6fd9147ffbc92608a76ae579f [2022-12-12 21:01:52,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 21:01:52,364 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 21:01:52,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 21:01:52,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 21:01:52,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 21:01:52,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 09:01:52" (1/1) ... [2022-12-12 21:01:52,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ae1725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:01:52, skipping insertion in model container [2022-12-12 21:01:52,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 09:01:52" (1/1) ... [2022-12-12 21:01:52,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 21:01:52,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 21:01:52,667 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-deagle/circular_buffer_bad.i[30440,30453] [2022-12-12 21:01:52,676 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-deagle/circular_buffer_bad.i[30895,30908] [2022-12-12 21:01:52,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 21:01:52,693 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 21:01:52,726 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-deagle/circular_buffer_bad.i[30440,30453] [2022-12-12 21:01:52,728 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-deagle/circular_buffer_bad.i[30895,30908] [2022-12-12 21:01:52,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 21:01:52,780 INFO L208 MainTranslator]: Completed translation [2022-12-12 21:01:52,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:01:52 WrapperNode [2022-12-12 21:01:52,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 21:01:52,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 21:01:52,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 21:01:52,782 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 21:01:52,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:01:52" (1/1) ... [2022-12-12 21:01:52,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:01:52" (1/1) ... [2022-12-12 21:01:52,834 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 135 [2022-12-12 21:01:52,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 21:01:52,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 21:01:52,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 21:01:52,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 21:01:52,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:01:52" (1/1) ... [2022-12-12 21:01:52,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:01:52" (1/1) ... [2022-12-12 21:01:52,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:01:52" (1/1) ... [2022-12-12 21:01:52,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:01:52" (1/1) ... [2022-12-12 21:01:52,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:01:52" (1/1) ... [2022-12-12 21:01:52,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:01:52" (1/1) ... [2022-12-12 21:01:52,863 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:01:52" (1/1) ... [2022-12-12 21:01:52,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:01:52" (1/1) ... [2022-12-12 21:01:52,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 21:01:52,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 21:01:52,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 21:01:52,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 21:01:52,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:01:52" (1/1) ... [2022-12-12 21:01:52,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 21:01:52,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:01:52,937 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) [2022-12-12 21:01:52,947 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 [2022-12-12 21:01:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 21:01:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-12 21:01:52,965 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-12 21:01:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-12 21:01:52,965 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-12 21:01:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 21:01:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-12 21:01:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 21:01:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 21:01:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 21:01:52,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-12 21:01:52,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 21:01:52,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 21:01:52,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 21:01:52,967 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 21:01:53,069 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 21:01:53,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 21:01:53,294 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 21:01:53,305 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 21:01:53,305 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-12 21:01:53,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 09:01:53 BoogieIcfgContainer [2022-12-12 21:01:53,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 21:01:53,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 21:01:53,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 21:01:53,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 21:01:53,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 09:01:52" (1/3) ... [2022-12-12 21:01:53,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49382cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 09:01:53, skipping insertion in model container [2022-12-12 21:01:53,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:01:52" (2/3) ... [2022-12-12 21:01:53,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49382cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 09:01:53, skipping insertion in model container [2022-12-12 21:01:53,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 09:01:53" (3/3) ... [2022-12-12 21:01:53,315 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2022-12-12 21:01:53,330 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 21:01:53,331 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-12 21:01:53,331 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 21:01:53,397 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 21:01:53,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 140 transitions, 296 flow [2022-12-12 21:01:53,508 INFO L130 PetriNetUnfolder]: 10/138 cut-off events. [2022-12-12 21:01:53,509 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 21:01:53,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 10/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 251 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2022-12-12 21:01:53,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 140 transitions, 296 flow [2022-12-12 21:01:53,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 129 transitions, 267 flow [2022-12-12 21:01:53,525 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 21:01:53,548 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 129 transitions, 267 flow [2022-12-12 21:01:53,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 129 transitions, 267 flow [2022-12-12 21:01:53,601 INFO L130 PetriNetUnfolder]: 10/129 cut-off events. [2022-12-12 21:01:53,601 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:01:53,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 129 events. 10/129 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 235 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2022-12-12 21:01:53,608 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 129 transitions, 267 flow [2022-12-12 21:01:53,609 INFO L226 LiptonReduction]: Number of co-enabled transitions 3840 [2022-12-12 21:01:58,972 INFO L241 LiptonReduction]: Total number of compositions: 104 [2022-12-12 21:01:58,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 21:01:58,987 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@1a9e7486, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 21:01:58,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-12 21:01:58,990 INFO L130 PetriNetUnfolder]: 2/18 cut-off events. [2022-12-12 21:01:58,991 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 21:01:58,991 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:01:58,991 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-12 21:01:58,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 21:01:58,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:01:58,995 INFO L85 PathProgramCache]: Analyzing trace with hash 18037318, now seen corresponding path program 1 times [2022-12-12 21:01:59,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:01:59,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179209657] [2022-12-12 21:01:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:01:59,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:01:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:01:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:01:59,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:01:59,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179209657] [2022-12-12 21:01:59,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179209657] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:01:59,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 21:01:59,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-12 21:01:59,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247559172] [2022-12-12 21:01:59,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:01:59,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-12 21:01:59,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:01:59,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-12 21:01:59,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-12 21:01:59,167 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 90 [2022-12-12 21:01:59,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 90 transitions, 189 flow. Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:01:59,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:01:59,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 90 [2022-12-12 21:01:59,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:01:59,559 INFO L130 PetriNetUnfolder]: 3728/6097 cut-off events. [2022-12-12 21:01:59,559 INFO L131 PetriNetUnfolder]: For 100/100 co-relation queries the response was YES. [2022-12-12 21:01:59,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11904 conditions, 6097 events. 3728/6097 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 40368 event pairs, 3232 based on Foata normal form. 0/2066 useless extension candidates. Maximal degree in co-relation 11613. Up to 5728 conditions per place. [2022-12-12 21:01:59,577 INFO L137 encePairwiseOnDemand]: 81/90 looper letters, 65 selfloop transitions, 0 changer transitions 0/81 dead transitions. [2022-12-12 21:01:59,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 81 transitions, 301 flow [2022-12-12 21:01:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-12 21:01:59,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-12 21:01:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 106 transitions. [2022-12-12 21:01:59,586 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2022-12-12 21:01:59,588 INFO L295 CegarLoopForPetriNet]: 87 programPoint places, -5 predicate places. [2022-12-12 21:01:59,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 301 flow [2022-12-12 21:01:59,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 81 transitions, 301 flow [2022-12-12 21:01:59,602 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 301 flow [2022-12-12 21:01:59,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:01:59,602 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:01:59,602 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:01:59,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 21:01:59,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 21:01:59,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:01:59,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2114910005, now seen corresponding path program 1 times [2022-12-12 21:01:59,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:01:59,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493782417] [2022-12-12 21:01:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:01:59,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:01:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:01:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:01:59,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:01:59,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493782417] [2022-12-12 21:01:59,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493782417] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:01:59,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 21:01:59,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 21:01:59,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762146368] [2022-12-12 21:01:59,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:01:59,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 21:01:59,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:01:59,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 21:01:59,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 21:01:59,717 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 90 [2022-12-12 21:01:59,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 301 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:01:59,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:01:59,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 90 [2022-12-12 21:01:59,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:02:00,193 INFO L130 PetriNetUnfolder]: 4816/8112 cut-off events. [2022-12-12 21:02:00,193 INFO L131 PetriNetUnfolder]: For 225/267 co-relation queries the response was YES. [2022-12-12 21:02:00,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23377 conditions, 8112 events. 4816/8112 cut-off events. For 225/267 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 54301 event pairs, 2276 based on Foata normal form. 71/2949 useless extension candidates. Maximal degree in co-relation 22812. Up to 7503 conditions per place. [2022-12-12 21:02:00,215 INFO L137 encePairwiseOnDemand]: 77/90 looper letters, 71 selfloop transitions, 3 changer transitions 34/123 dead transitions. [2022-12-12 21:02:00,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 123 transitions, 689 flow [2022-12-12 21:02:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 21:02:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 21:02:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2022-12-12 21:02:00,217 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6037037037037037 [2022-12-12 21:02:00,217 INFO L295 CegarLoopForPetriNet]: 87 programPoint places, -3 predicate places. [2022-12-12 21:02:00,218 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 123 transitions, 689 flow [2022-12-12 21:02:00,231 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 89 transitions, 485 flow [2022-12-12 21:02:00,232 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 89 transitions, 485 flow [2022-12-12 21:02:00,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:02:00,232 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:02:00,232 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:02:00,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 21:02:00,232 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 21:02:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:02:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1458592617, now seen corresponding path program 1 times [2022-12-12 21:02:00,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:02:00,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894051760] [2022-12-12 21:02:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:02:00,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:02:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:02:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:02:00,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:02:00,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894051760] [2022-12-12 21:02:00,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894051760] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:02:00,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 21:02:00,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 21:02:00,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112888439] [2022-12-12 21:02:00,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:02:00,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 21:02:00,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:02:00,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 21:02:00,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 21:02:00,366 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 90 [2022-12-12 21:02:00,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 89 transitions, 485 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:02:00,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:02:00,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 90 [2022-12-12 21:02:00,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:02:00,512 INFO L130 PetriNetUnfolder]: 977/1833 cut-off events. [2022-12-12 21:02:00,513 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2022-12-12 21:02:00,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6748 conditions, 1833 events. 977/1833 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10874 event pairs, 106 based on Foata normal form. 90/1213 useless extension candidates. Maximal degree in co-relation 6485. Up to 1571 conditions per place. [2022-12-12 21:02:00,519 INFO L137 encePairwiseOnDemand]: 80/90 looper letters, 56 selfloop transitions, 13 changer transitions 28/112 dead transitions. [2022-12-12 21:02:00,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 112 transitions, 829 flow [2022-12-12 21:02:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 21:02:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 21:02:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2022-12-12 21:02:00,520 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37407407407407406 [2022-12-12 21:02:00,521 INFO L295 CegarLoopForPetriNet]: 87 programPoint places, -25 predicate places. [2022-12-12 21:02:00,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 112 transitions, 829 flow [2022-12-12 21:02:00,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 84 transitions, 602 flow [2022-12-12 21:02:00,526 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 84 transitions, 602 flow [2022-12-12 21:02:00,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:02:00,526 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:02:00,527 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:02:00,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 21:02:00,527 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 21:02:00,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:02:00,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1572652444, now seen corresponding path program 1 times [2022-12-12 21:02:00,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:02:00,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220772818] [2022-12-12 21:02:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:02:00,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:02:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:02:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:02:00,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:02:00,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220772818] [2022-12-12 21:02:00,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220772818] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:02:00,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 21:02:00,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 21:02:00,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383835015] [2022-12-12 21:02:00,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:02:00,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 21:02:00,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:02:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 21:02:00,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 21:02:00,656 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 90 [2022-12-12 21:02:00,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 84 transitions, 602 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:02:00,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:02:00,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 90 [2022-12-12 21:02:00,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:02:00,769 INFO L130 PetriNetUnfolder]: 691/1392 cut-off events. [2022-12-12 21:02:00,769 INFO L131 PetriNetUnfolder]: For 658/658 co-relation queries the response was YES. [2022-12-12 21:02:00,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5759 conditions, 1392 events. 691/1392 cut-off events. For 658/658 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7701 event pairs, 47 based on Foata normal form. 0/1041 useless extension candidates. Maximal degree in co-relation 5472. Up to 1041 conditions per place. [2022-12-12 21:02:00,774 INFO L137 encePairwiseOnDemand]: 86/90 looper letters, 75 selfloop transitions, 2 changer transitions 12/105 dead transitions. [2022-12-12 21:02:00,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 105 transitions, 948 flow [2022-12-12 21:02:00,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 21:02:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 21:02:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2022-12-12 21:02:00,776 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2022-12-12 21:02:00,776 INFO L295 CegarLoopForPetriNet]: 87 programPoint places, -33 predicate places. [2022-12-12 21:02:00,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 105 transitions, 948 flow [2022-12-12 21:02:00,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 93 transitions, 834 flow [2022-12-12 21:02:00,781 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 93 transitions, 834 flow [2022-12-12 21:02:00,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:02:00,781 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:02:00,781 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:02:00,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 21:02:00,782 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 21:02:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:02:00,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1060422526, now seen corresponding path program 1 times [2022-12-12 21:02:00,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:02:00,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605721872] [2022-12-12 21:02:00,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:02:00,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:02:00,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-12 21:02:00,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205991106] [2022-12-12 21:02:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:02:00,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:02:00,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:02:00,798 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:02:00,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 21:02:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:02:01,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 21:02:01,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:02:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:02:01,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 21:02:01,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:02:01,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605721872] [2022-12-12 21:02:01,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-12 21:02:01,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205991106] [2022-12-12 21:02:01,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205991106] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:02:01,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 21:02:01,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 21:02:01,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818145956] [2022-12-12 21:02:01,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:02:01,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 21:02:01,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:02:01,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 21:02:01,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 21:02:01,117 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 90 [2022-12-12 21:02:01,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 93 transitions, 834 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2022-12-12 21:02:01,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:02:01,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 90 [2022-12-12 21:02:01,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:02:01,345 INFO L130 PetriNetUnfolder]: 882/1703 cut-off events. [2022-12-12 21:02:01,345 INFO L131 PetriNetUnfolder]: For 1126/1126 co-relation queries the response was YES. [2022-12-12 21:02:01,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8676 conditions, 1703 events. 882/1703 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9350 event pairs, 32 based on Foata normal form. 0/1230 useless extension candidates. Maximal degree in co-relation 8265. Up to 1350 conditions per place. [2022-12-12 21:02:01,358 INFO L137 encePairwiseOnDemand]: 85/90 looper letters, 109 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2022-12-12 21:02:01,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 129 transitions, 1432 flow [2022-12-12 21:02:01,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 21:02:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 21:02:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2022-12-12 21:02:01,360 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35 [2022-12-12 21:02:01,361 INFO L295 CegarLoopForPetriNet]: 87 programPoint places, -31 predicate places. [2022-12-12 21:02:01,361 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 129 transitions, 1432 flow [2022-12-12 21:02:01,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 129 transitions, 1432 flow [2022-12-12 21:02:01,369 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 129 transitions, 1432 flow [2022-12-12 21:02:01,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2022-12-12 21:02:01,369 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:02:01,369 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:02:01,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 21:02:01,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:02:01,575 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 21:02:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:02:01,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1486652841, now seen corresponding path program 1 times [2022-12-12 21:02:01,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:02:01,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246398168] [2022-12-12 21:02:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:02:01,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:02:01,595 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-12 21:02:01,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246571947] [2022-12-12 21:02:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:02:01,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:02:01,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:02:01,609 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:02:01,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 21:02:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:02:01,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-12 21:02:01,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:02:01,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 21:02:01,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2022-12-12 21:02:01,873 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-12-12 21:02:01,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-12-12 21:02:01,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-12 21:02:01,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-12-12 21:02:02,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-12-12 21:02:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:02:02,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 21:02:02,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:02:02,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246398168] [2022-12-12 21:02:02,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-12 21:02:02,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246571947] [2022-12-12 21:02:02,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246571947] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:02:02,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 21:02:02,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-12 21:02:02,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687074115] [2022-12-12 21:02:02,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:02:02,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 21:02:02,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:02:02,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 21:02:02,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-12 21:02:02,173 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 90 [2022-12-12 21:02:02,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 129 transitions, 1432 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:02:02,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:02:02,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 90 [2022-12-12 21:02:02,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:02:02,917 INFO L130 PetriNetUnfolder]: 3896/6945 cut-off events. [2022-12-12 21:02:02,917 INFO L131 PetriNetUnfolder]: For 11349/11352 co-relation queries the response was YES. [2022-12-12 21:02:02,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38403 conditions, 6945 events. 3896/6945 cut-off events. For 11349/11352 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 45558 event pairs, 439 based on Foata normal form. 0/5043 useless extension candidates. Maximal degree in co-relation 36999. Up to 4945 conditions per place. [2022-12-12 21:02:02,945 INFO L137 encePairwiseOnDemand]: 80/90 looper letters, 307 selfloop transitions, 43 changer transitions 41/403 dead transitions. [2022-12-12 21:02:02,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 403 transitions, 5383 flow [2022-12-12 21:02:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 21:02:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 21:02:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2022-12-12 21:02:02,946 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33611111111111114 [2022-12-12 21:02:02,947 INFO L295 CegarLoopForPetriNet]: 87 programPoint places, -24 predicate places. [2022-12-12 21:02:02,947 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 403 transitions, 5383 flow [2022-12-12 21:02:02,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 362 transitions, 4913 flow [2022-12-12 21:02:02,967 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 362 transitions, 4913 flow [2022-12-12 21:02:02,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:02:02,967 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:02:02,968 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:02:02,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 21:02:03,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-12 21:02:03,173 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 21:02:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:02:03,174 INFO L85 PathProgramCache]: Analyzing trace with hash -489027222, now seen corresponding path program 1 times [2022-12-12 21:02:03,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:02:03,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083897438] [2022-12-12 21:02:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:02:03,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:02:03,186 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-12 21:02:03,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321235037] [2022-12-12 21:02:03,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:02:03,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:02:03,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:02:03,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:02:03,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 21:02:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:02:03,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-12 21:02:03,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:02:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:02:03,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 21:02:03,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:02:03,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083897438] [2022-12-12 21:02:03,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-12 21:02:03,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321235037] [2022-12-12 21:02:03,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321235037] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:02:03,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 21:02:03,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 21:02:03,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435610073] [2022-12-12 21:02:03,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:02:03,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 21:02:03,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:02:03,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 21:02:03,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 21:02:03,289 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 90 [2022-12-12 21:02:03,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 362 transitions, 4913 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:02:03,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:02:03,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 90 [2022-12-12 21:02:03,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:02:03,711 INFO L130 PetriNetUnfolder]: 3012/5353 cut-off events. [2022-12-12 21:02:03,712 INFO L131 PetriNetUnfolder]: For 14626/14629 co-relation queries the response was YES. [2022-12-12 21:02:03,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34375 conditions, 5353 events. 3012/5353 cut-off events. For 14626/14629 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 31190 event pairs, 363 based on Foata normal form. 215/4033 useless extension candidates. Maximal degree in co-relation 33468. Up to 3941 conditions per place. [2022-12-12 21:02:03,731 INFO L137 encePairwiseOnDemand]: 84/90 looper letters, 261 selfloop transitions, 6 changer transitions 83/365 dead transitions. [2022-12-12 21:02:03,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 365 transitions, 5645 flow [2022-12-12 21:02:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 21:02:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 21:02:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2022-12-12 21:02:03,733 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.31851851851851853 [2022-12-12 21:02:03,733 INFO L295 CegarLoopForPetriNet]: 87 programPoint places, -24 predicate places. [2022-12-12 21:02:03,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 365 transitions, 5645 flow [2022-12-12 21:02:03,749 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 282 transitions, 4365 flow [2022-12-12 21:02:03,749 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 282 transitions, 4365 flow [2022-12-12 21:02:03,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:02:03,750 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:02:03,750 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:02:03,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 21:02:03,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:02:03,955 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 21:02:03,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:02:03,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1754473554, now seen corresponding path program 1 times [2022-12-12 21:02:03,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:02:03,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076167754] [2022-12-12 21:02:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:02:03,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:02:03,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-12 21:02:03,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233761393] [2022-12-12 21:02:03,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:02:03,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:02:03,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:02:03,968 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:02:03,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 21:02:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-12 21:02:04,193 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-12 21:02:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-12 21:02:04,246 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-12 21:02:04,246 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-12 21:02:04,247 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-12-12 21:02:04,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-12-12 21:02:04,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-12-12 21:02:04,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-12 21:02:04,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-12 21:02:04,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-12 21:02:04,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 21:02:04,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:02:04,449 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:02:04,453 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 21:02:04,453 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 21:02:04,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 09:02:04 BasicIcfg [2022-12-12 21:02:04,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 21:02:04,494 INFO L158 Benchmark]: Toolchain (without parser) took 12129.71ms. Allocated memory was 226.5MB in the beginning and 442.5MB in the end (delta: 216.0MB). Free memory was 200.6MB in the beginning and 181.8MB in the end (delta: 18.8MB). Peak memory consumption was 236.2MB. Max. memory is 8.0GB. [2022-12-12 21:02:04,494 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 226.5MB. Free memory is still 202.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 21:02:04,495 INFO L158 Benchmark]: CACSL2BoogieTranslator took 415.16ms. Allocated memory is still 226.5MB. Free memory was 200.6MB in the beginning and 180.6MB in the end (delta: 20.1MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2022-12-12 21:02:04,495 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.24ms. Allocated memory is still 226.5MB. Free memory was 180.6MB in the beginning and 177.9MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-12-12 21:02:04,495 INFO L158 Benchmark]: Boogie Preprocessor took 39.27ms. Allocated memory is still 226.5MB. Free memory was 177.9MB in the beginning and 176.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 21:02:04,495 INFO L158 Benchmark]: RCFGBuilder took 432.03ms. Allocated memory is still 226.5MB. Free memory was 176.4MB in the beginning and 158.5MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2022-12-12 21:02:04,496 INFO L158 Benchmark]: TraceAbstraction took 11184.18ms. Allocated memory was 226.5MB in the beginning and 442.5MB in the end (delta: 216.0MB). Free memory was 157.0MB in the beginning and 181.8MB in the end (delta: -24.9MB). Peak memory consumption was 192.2MB. Max. memory is 8.0GB. [2022-12-12 21:02:04,497 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 226.5MB. Free memory is still 202.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 415.16ms. Allocated memory is still 226.5MB. Free memory was 200.6MB in the beginning and 180.6MB in the end (delta: 20.1MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 53.24ms. Allocated memory is still 226.5MB. Free memory was 180.6MB in the beginning and 177.9MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.27ms. Allocated memory is still 226.5MB. Free memory was 177.9MB in the beginning and 176.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 432.03ms. Allocated memory is still 226.5MB. Free memory was 176.4MB in the beginning and 158.5MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 11184.18ms. Allocated memory was 226.5MB in the beginning and 442.5MB in the end (delta: 216.0MB). Free memory was 157.0MB in the beginning and 181.8MB in the end (delta: -24.9MB). Peak memory consumption was 192.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.4s, 126 PlacesBefore, 87 PlacesAfterwards, 129 TransitionsBefore, 90 TransitionsAfterwards, 3840 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 5 ConcurrentSequentialCompositions, 41 TrivialYvCompositions, 55 ConcurrentYvCompositions, 3 ChoiceCompositions, 104 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 8784, independent: 8597, independent conditional: 8597, independent unconditional: 0, dependent: 187, dependent conditional: 187, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 8784, independent: 8597, independent conditional: 0, independent unconditional: 8597, dependent: 187, dependent conditional: 0, dependent unconditional: 187, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 8784, independent: 8597, independent conditional: 0, independent unconditional: 8597, dependent: 187, dependent conditional: 0, dependent unconditional: 187, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 8784, independent: 8597, independent conditional: 0, independent unconditional: 8597, dependent: 187, dependent conditional: 0, dependent unconditional: 187, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 3696, independent: 3645, independent conditional: 0, independent unconditional: 3645, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 3696, independent: 3526, independent conditional: 0, independent unconditional: 3526, dependent: 170, dependent conditional: 0, dependent unconditional: 170, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 170, independent: 119, independent conditional: 0, independent unconditional: 119, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 200, independent: 112, independent conditional: 0, independent unconditional: 112, dependent: 88, dependent conditional: 0, dependent unconditional: 88, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 8784, independent: 4952, independent conditional: 0, independent unconditional: 4952, dependent: 136, dependent conditional: 0, dependent unconditional: 136, unknown: 3696, unknown conditional: 0, unknown unconditional: 3696] , Statistics on independence cache: Total cache size (in pairs): 9355, Positive cache size: 9304, Positive conditional cache size: 0, Positive unconditional cache size: 9304, Negative cache size: 51, Negative conditional cache size: 0, Negative unconditional cache size: 51, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - CounterExampleResult [Line: 746]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-2, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=-1, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 [L743] COND FALSE 2 !(\read(receive)) VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L710] 1 next = (next+1)%buffer_size [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: 761]: 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: 762]: 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: 713]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 199 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.1s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 11.0s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 325 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 325 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5 mSDsCounter, 31 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 737 IncrementalHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 31 mSolverCounterUnsat, 4 mSDtfsCounter, 737 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4913occurred in iteration=6, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 2295 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 81 ConstructedInterpolants, 8 QuantifiedInterpolants, 653 SizeOfPredicates, 17 NumberOfNonLiveVariables, 688 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 2/2 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! [2022-12-12 21:02:04,519 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...