./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 22:04:17,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:04:17,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:04:17,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:04:17,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:04:17,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:04:17,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:04:17,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:04:17,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:04:17,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:04:17,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:04:17,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:04:17,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:04:17,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:04:17,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:04:17,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:04:17,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:04:17,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:04:17,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:04:17,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:04:17,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:04:17,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:04:17,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:04:17,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:04:17,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:04:17,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:04:17,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:04:18,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:04:18,003 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:04:18,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:04:18,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:04:18,006 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:04:18,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:04:18,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:04:18,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:04:18,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:04:18,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:04:18,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:04:18,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:04:18,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:04:18,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:04:18,016 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:04:18,043 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:04:18,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:04:18,045 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:04:18,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:04:18,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:04:18,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:04:18,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:04:18,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:04:18,047 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:04:18,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:04:18,048 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:04:18,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:04:18,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:04:18,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:04:18,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:04:18,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:04:18,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:04:18,049 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:04:18,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:04:18,049 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:04:18,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:04:18,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:04:18,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:04:18,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:04:18,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:04:18,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:04:18,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:04:18,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:04:18,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:04:18,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:04:18,051 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:04:18,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:04:18,052 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:04:18,052 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:04:18,052 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:04:18,053 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 22:04:18,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:04:18,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:04:18,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:04:18,346 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:04:18,346 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:04:18,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-08-30 22:04:19,549 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:04:19,811 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:04:19,811 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-08-30 22:04:19,827 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/313b58e4e/6360dc310e2a45d4ad38aa921c54b091/FLAGda188ffde [2023-08-30 22:04:19,841 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/313b58e4e/6360dc310e2a45d4ad38aa921c54b091 [2023-08-30 22:04:19,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:04:19,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:04:19,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:04:19,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:04:19,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:04:19,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:04:19" (1/1) ... [2023-08-30 22:04:19,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61bcca87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:19, skipping insertion in model container [2023-08-30 22:04:19,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:04:19" (1/1) ... [2023-08-30 22:04:19,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:04:19,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:04:20,158 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30440,30453] [2023-08-30 22:04:20,170 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30895,30908] [2023-08-30 22:04:20,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:04:20,192 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:04:20,239 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30440,30453] [2023-08-30 22:04:20,250 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30895,30908] [2023-08-30 22:04:20,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:04:20,300 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:04:20,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:20 WrapperNode [2023-08-30 22:04:20,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:04:20,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:04:20,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:04:20,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:04:20,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:20" (1/1) ... [2023-08-30 22:04:20,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:20" (1/1) ... [2023-08-30 22:04:20,368 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 135 [2023-08-30 22:04:20,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:04:20,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:04:20,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:04:20,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:04:20,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:20" (1/1) ... [2023-08-30 22:04:20,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:20" (1/1) ... [2023-08-30 22:04:20,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:20" (1/1) ... [2023-08-30 22:04:20,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:20" (1/1) ... [2023-08-30 22:04:20,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:20" (1/1) ... [2023-08-30 22:04:20,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:20" (1/1) ... [2023-08-30 22:04:20,418 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:20" (1/1) ... [2023-08-30 22:04:20,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:20" (1/1) ... [2023-08-30 22:04:20,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:04:20,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:04:20,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:04:20,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:04:20,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:20" (1/1) ... [2023-08-30 22:04:20,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:04:20,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:20,470 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 22:04:20,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 22:04:20,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 22:04:20,511 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 22:04:20,512 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 22:04:20,512 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 22:04:20,512 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 22:04:20,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:04:20,512 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 22:04:20,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:04:20,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:04:20,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:04:20,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-30 22:04:20,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:04:20,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:04:20,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:04:20,514 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 22:04:20,671 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:04:20,686 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:04:20,900 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:04:20,907 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:04:20,907 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 22:04:20,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:04:20 BoogieIcfgContainer [2023-08-30 22:04:20,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:04:20,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:04:20,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:04:20,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:04:20,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:04:19" (1/3) ... [2023-08-30 22:04:20,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e23a525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:04:20, skipping insertion in model container [2023-08-30 22:04:20,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:04:20" (2/3) ... [2023-08-30 22:04:20,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e23a525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:04:20, skipping insertion in model container [2023-08-30 22:04:20,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:04:20" (3/3) ... [2023-08-30 22:04:20,916 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2023-08-30 22:04:20,923 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:04:20,931 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:04:20,931 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 22:04:20,932 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:04:21,013 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 22:04:21,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 140 transitions, 296 flow [2023-08-30 22:04:21,092 INFO L130 PetriNetUnfolder]: 10/138 cut-off events. [2023-08-30 22:04:21,098 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:04:21,105 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. [2023-08-30 22:04:21,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 140 transitions, 296 flow [2023-08-30 22:04:21,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 129 transitions, 267 flow [2023-08-30 22:04:21,112 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:04:21,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 129 transitions, 267 flow [2023-08-30 22:04:21,122 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 129 transitions, 267 flow [2023-08-30 22:04:21,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 129 transitions, 267 flow [2023-08-30 22:04:21,154 INFO L130 PetriNetUnfolder]: 10/129 cut-off events. [2023-08-30 22:04:21,154 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:04:21,155 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. [2023-08-30 22:04:21,158 INFO L119 LiptonReduction]: Number of co-enabled transitions 3840 [2023-08-30 22:04:25,554 INFO L134 LiptonReduction]: Checked pairs total: 8363 [2023-08-30 22:04:25,555 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-30 22:04:25,567 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:04:25,573 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=true, 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;@1313af0e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:04:25,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 22:04:25,579 INFO L130 PetriNetUnfolder]: 2/19 cut-off events. [2023-08-30 22:04:25,580 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:04:25,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:25,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:25,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:04:25,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:25,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1708763483, now seen corresponding path program 1 times [2023-08-30 22:04:25,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:25,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001802070] [2023-08-30 22:04:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:25,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:25,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 22:04:25,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924531452] [2023-08-30 22:04:25,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:25,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:25,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:25,705 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:04:25,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 22:04:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:25,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 22:04:25,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:25,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 22:04:25,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:25,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001802070] [2023-08-30 22:04:25,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 22:04:25,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924531452] [2023-08-30 22:04:25,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924531452] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:25,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:25,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:04:25,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848200805] [2023-08-30 22:04:25,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:25,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:04:25,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:25,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:04:25,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:04:25,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 251 [2023-08-30 22:04:25,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:25,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:25,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 251 [2023-08-30 22:04:25,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:26,110 INFO L130 PetriNetUnfolder]: 417/682 cut-off events. [2023-08-30 22:04:26,110 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-08-30 22:04:26,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1344 conditions, 682 events. 417/682 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2735 event pairs, 297 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 1238. Up to 626 conditions per place. [2023-08-30 22:04:26,117 INFO L137 encePairwiseOnDemand]: 249/251 looper letters, 28 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-30 22:04:26,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 133 flow [2023-08-30 22:04:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:04:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:04:26,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2023-08-30 22:04:26,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378486055776892 [2023-08-30 22:04:26,130 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2023-08-30 22:04:26,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2023-08-30 22:04:26,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:26,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2023-08-30 22:04:26,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:26,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:26,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:26,144 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 77 flow. Second operand 3 states and 405 transitions. [2023-08-30 22:04:26,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 133 flow [2023-08-30 22:04:26,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 128 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 22:04:26,148 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 72 flow [2023-08-30 22:04:26,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2023-08-30 22:04:26,152 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -2 predicate places. [2023-08-30 22:04:26,153 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 72 flow [2023-08-30 22:04:26,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:26,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:26,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:26,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 22:04:26,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-08-30 22:04:26,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:04:26,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:26,361 INFO L85 PathProgramCache]: Analyzing trace with hash 306299020, now seen corresponding path program 1 times [2023-08-30 22:04:26,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:26,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273705173] [2023-08-30 22:04:26,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:26,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:26,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:26,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273705173] [2023-08-30 22:04:26,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273705173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:26,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:26,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:04:26,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284964948] [2023-08-30 22:04:26,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:26,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:04:26,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:26,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:04:26,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:04:26,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 251 [2023-08-30 22:04:26,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:26,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:26,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 251 [2023-08-30 22:04:26,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:26,685 INFO L130 PetriNetUnfolder]: 592/999 cut-off events. [2023-08-30 22:04:26,686 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:04:26,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2001 conditions, 999 events. 592/999 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3921 event pairs, 228 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 1995. Up to 585 conditions per place. [2023-08-30 22:04:26,690 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 46 selfloop transitions, 3 changer transitions 2/54 dead transitions. [2023-08-30 22:04:26,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 54 transitions, 219 flow [2023-08-30 22:04:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:04:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:04:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2023-08-30 22:04:26,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670650730411687 [2023-08-30 22:04:26,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2023-08-30 22:04:26,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2023-08-30 22:04:26,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:26,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2023-08-30 22:04:26,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:26,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:26,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:26,701 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 72 flow. Second operand 3 states and 427 transitions. [2023-08-30 22:04:26,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 54 transitions, 219 flow [2023-08-30 22:04:26,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 54 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:04:26,703 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 84 flow [2023-08-30 22:04:26,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-08-30 22:04:26,704 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-08-30 22:04:26,704 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 84 flow [2023-08-30 22:04:26,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:26,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:26,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:26,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:04:26,706 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:04:26,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:26,707 INFO L85 PathProgramCache]: Analyzing trace with hash 501019712, now seen corresponding path program 1 times [2023-08-30 22:04:26,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:26,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984426194] [2023-08-30 22:04:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:26,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:26,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:26,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984426194] [2023-08-30 22:04:26,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984426194] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:26,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:26,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:04:26,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595851981] [2023-08-30 22:04:26,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:26,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:04:26,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:26,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:04:26,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:04:26,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 251 [2023-08-30 22:04:26,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:26,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:26,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 251 [2023-08-30 22:04:26,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:27,045 INFO L130 PetriNetUnfolder]: 342/599 cut-off events. [2023-08-30 22:04:27,046 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 22:04:27,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1261 conditions, 599 events. 342/599 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2266 event pairs, 64 based on Foata normal form. 26/569 useless extension candidates. Maximal degree in co-relation 1253. Up to 416 conditions per place. [2023-08-30 22:04:27,049 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 36 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-08-30 22:04:27,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 187 flow [2023-08-30 22:04:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:04:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:04:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-30 22:04:27,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549800796812749 [2023-08-30 22:04:27,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-30 22:04:27,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-30 22:04:27,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:27,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-30 22:04:27,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:27,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:27,055 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:27,055 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 84 flow. Second operand 3 states and 414 transitions. [2023-08-30 22:04:27,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 187 flow [2023-08-30 22:04:27,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:04:27,057 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 89 flow [2023-08-30 22:04:27,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-08-30 22:04:27,058 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-08-30 22:04:27,058 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 89 flow [2023-08-30 22:04:27,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:27,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:27,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:27,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:04:27,059 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:04:27,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:27,060 INFO L85 PathProgramCache]: Analyzing trace with hash 944092763, now seen corresponding path program 1 times [2023-08-30 22:04:27,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:27,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051645690] [2023-08-30 22:04:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:27,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:27,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:27,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051645690] [2023-08-30 22:04:27,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051645690] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:27,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:27,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:04:27,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339477964] [2023-08-30 22:04:27,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:27,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:04:27,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:27,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:04:27,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:04:27,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 251 [2023-08-30 22:04:27,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:27,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:27,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 251 [2023-08-30 22:04:27,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:27,329 INFO L130 PetriNetUnfolder]: 344/643 cut-off events. [2023-08-30 22:04:27,330 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-08-30 22:04:27,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 643 events. 344/643 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2376 event pairs, 129 based on Foata normal form. 0/601 useless extension candidates. Maximal degree in co-relation 1374. Up to 415 conditions per place. [2023-08-30 22:04:27,333 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 39 selfloop transitions, 2 changer transitions 3/49 dead transitions. [2023-08-30 22:04:27,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 49 transitions, 216 flow [2023-08-30 22:04:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:04:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:04:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2023-08-30 22:04:27,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5537848605577689 [2023-08-30 22:04:27,335 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2023-08-30 22:04:27,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2023-08-30 22:04:27,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:27,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2023-08-30 22:04:27,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:27,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:27,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:27,338 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 89 flow. Second operand 3 states and 417 transitions. [2023-08-30 22:04:27,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 49 transitions, 216 flow [2023-08-30 22:04:27,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 49 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:04:27,340 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 97 flow [2023-08-30 22:04:27,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-08-30 22:04:27,341 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-30 22:04:27,341 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 97 flow [2023-08-30 22:04:27,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:27,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:27,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:27,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 22:04:27,342 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:04:27,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:27,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1856592171, now seen corresponding path program 1 times [2023-08-30 22:04:27,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:27,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263622622] [2023-08-30 22:04:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:27,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:27,358 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 22:04:27,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304092270] [2023-08-30 22:04:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:27,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:27,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:27,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:04:27,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 22:04:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:27,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 22:04:27,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:27,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 22:04:27,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:27,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263622622] [2023-08-30 22:04:27,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 22:04:27,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304092270] [2023-08-30 22:04:27,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304092270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:27,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:27,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:04:27,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3742598] [2023-08-30 22:04:27,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:27,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 22:04:27,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:27,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 22:04:27,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 22:04:27,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 251 [2023-08-30 22:04:27,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:27,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:27,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 251 [2023-08-30 22:04:27,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:27,953 INFO L130 PetriNetUnfolder]: 454/847 cut-off events. [2023-08-30 22:04:27,954 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-30 22:04:27,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1812 conditions, 847 events. 454/847 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3324 event pairs, 115 based on Foata normal form. 8/818 useless extension candidates. Maximal degree in co-relation 1801. Up to 408 conditions per place. [2023-08-30 22:04:27,958 INFO L137 encePairwiseOnDemand]: 246/251 looper letters, 56 selfloop transitions, 4 changer transitions 3/68 dead transitions. [2023-08-30 22:04:27,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 68 transitions, 305 flow [2023-08-30 22:04:27,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 22:04:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 22:04:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 541 transitions. [2023-08-30 22:04:27,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388446215139442 [2023-08-30 22:04:27,961 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 541 transitions. [2023-08-30 22:04:27,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 541 transitions. [2023-08-30 22:04:27,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:27,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 541 transitions. [2023-08-30 22:04:27,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:27,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:27,965 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:27,966 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 97 flow. Second operand 4 states and 541 transitions. [2023-08-30 22:04:27,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 68 transitions, 305 flow [2023-08-30 22:04:27,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 68 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:04:27,970 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 120 flow [2023-08-30 22:04:27,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-08-30 22:04:27,972 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-08-30 22:04:27,972 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 120 flow [2023-08-30 22:04:27,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:27,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:27,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:27,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 22:04:28,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:28,179 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:04:28,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:28,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1719788797, now seen corresponding path program 1 times [2023-08-30 22:04:28,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:28,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835930459] [2023-08-30 22:04:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:28,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:28,197 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 22:04:28,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439357367] [2023-08-30 22:04:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:28,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:28,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:28,199 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:04:28,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 22:04:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:28,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 22:04:28,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:28,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:04:28,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-30 22:04:28,499 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 22:04:28,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 22:04:28,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 22:04:28,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-08-30 22:04:28,802 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 59 treesize of output 53 [2023-08-30 22:04:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:28,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 22:04:28,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:28,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835930459] [2023-08-30 22:04:28,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 22:04:28,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439357367] [2023-08-30 22:04:28,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439357367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:28,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:28,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 22:04:28,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805396142] [2023-08-30 22:04:28,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:28,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 22:04:28,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:28,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 22:04:28,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-30 22:04:29,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 251 [2023-08-30 22:04:29,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 120 flow. Second operand has 9 states, 9 states have (on average 111.77777777777777) internal successors, (1006), 9 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:29,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:29,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 251 [2023-08-30 22:04:29,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:29,742 INFO L130 PetriNetUnfolder]: 1041/1922 cut-off events. [2023-08-30 22:04:29,743 INFO L131 PetriNetUnfolder]: For 254/262 co-relation queries the response was YES. [2023-08-30 22:04:29,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4170 conditions, 1922 events. 1041/1922 cut-off events. For 254/262 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9485 event pairs, 266 based on Foata normal form. 34/1876 useless extension candidates. Maximal degree in co-relation 4157. Up to 635 conditions per place. [2023-08-30 22:04:29,752 INFO L137 encePairwiseOnDemand]: 239/251 looper letters, 106 selfloop transitions, 24 changer transitions 3/138 dead transitions. [2023-08-30 22:04:29,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 138 transitions, 663 flow [2023-08-30 22:04:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 22:04:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 22:04:29,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1233 transitions. [2023-08-30 22:04:29,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49123505976095616 [2023-08-30 22:04:29,756 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1233 transitions. [2023-08-30 22:04:29,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1233 transitions. [2023-08-30 22:04:29,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:29,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1233 transitions. [2023-08-30 22:04:29,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 123.3) internal successors, (1233), 10 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:29,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:29,764 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 251.0) internal successors, (2761), 11 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:29,764 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 120 flow. Second operand 10 states and 1233 transitions. [2023-08-30 22:04:29,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 138 transitions, 663 flow [2023-08-30 22:04:29,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 138 transitions, 650 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 22:04:29,767 INFO L231 Difference]: Finished difference. Result has 53 places, 61 transitions, 290 flow [2023-08-30 22:04:29,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=290, PETRI_PLACES=53, PETRI_TRANSITIONS=61} [2023-08-30 22:04:29,768 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 18 predicate places. [2023-08-30 22:04:29,768 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 61 transitions, 290 flow [2023-08-30 22:04:29,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 111.77777777777777) internal successors, (1006), 9 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:29,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:29,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:29,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 22:04:29,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:29,983 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:04:29,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:29,983 INFO L85 PathProgramCache]: Analyzing trace with hash -304123085, now seen corresponding path program 2 times [2023-08-30 22:04:29,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:29,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169446942] [2023-08-30 22:04:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:29,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:29,998 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 22:04:29,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638084779] [2023-08-30 22:04:29,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 22:04:29,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:29,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:30,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:04:30,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 22:04:30,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 22:04:30,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:04:30,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 22:04:30,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:30,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 22:04:30,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-30 22:04:30,262 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 22:04:30,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 22:04:30,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 22:04:30,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-08-30 22:04:30,513 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 59 treesize of output 53 [2023-08-30 22:04:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:30,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 22:04:30,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:30,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169446942] [2023-08-30 22:04:30,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 22:04:30,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638084779] [2023-08-30 22:04:30,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638084779] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:30,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:30,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 22:04:30,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202589341] [2023-08-30 22:04:30,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:30,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 22:04:30,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 22:04:30,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-30 22:04:30,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 251 [2023-08-30 22:04:30,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 61 transitions, 290 flow. Second operand has 9 states, 9 states have (on average 111.77777777777777) internal successors, (1006), 9 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:30,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:30,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 251 [2023-08-30 22:04:30,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:31,640 INFO L130 PetriNetUnfolder]: 1710/3167 cut-off events. [2023-08-30 22:04:31,640 INFO L131 PetriNetUnfolder]: For 3910/3941 co-relation queries the response was YES. [2023-08-30 22:04:31,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9412 conditions, 3167 events. 1710/3167 cut-off events. For 3910/3941 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 17481 event pairs, 356 based on Foata normal form. 41/3182 useless extension candidates. Maximal degree in co-relation 9393. Up to 769 conditions per place. [2023-08-30 22:04:31,656 INFO L137 encePairwiseOnDemand]: 240/251 looper letters, 132 selfloop transitions, 44 changer transitions 3/184 dead transitions. [2023-08-30 22:04:31,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 184 transitions, 1174 flow [2023-08-30 22:04:31,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 22:04:31,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 22:04:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1478 transitions. [2023-08-30 22:04:31,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4907038512616202 [2023-08-30 22:04:31,661 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1478 transitions. [2023-08-30 22:04:31,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1478 transitions. [2023-08-30 22:04:31,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:31,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1478 transitions. [2023-08-30 22:04:31,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 123.16666666666667) internal successors, (1478), 12 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:31,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:31,671 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 251.0) internal successors, (3263), 13 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:31,671 INFO L175 Difference]: Start difference. First operand has 53 places, 61 transitions, 290 flow. Second operand 12 states and 1478 transitions. [2023-08-30 22:04:31,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 184 transitions, 1174 flow [2023-08-30 22:04:31,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 184 transitions, 1172 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 22:04:31,682 INFO L231 Difference]: Finished difference. Result has 72 places, 83 transitions, 616 flow [2023-08-30 22:04:31,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=616, PETRI_PLACES=72, PETRI_TRANSITIONS=83} [2023-08-30 22:04:31,683 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 37 predicate places. [2023-08-30 22:04:31,683 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 83 transitions, 616 flow [2023-08-30 22:04:31,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 111.77777777777777) internal successors, (1006), 9 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:31,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:31,684 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:31,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 22:04:31,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:31,890 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:04:31,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:31,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1084291500, now seen corresponding path program 1 times [2023-08-30 22:04:31,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:31,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910340842] [2023-08-30 22:04:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:31,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:31,914 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 22:04:31,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995836510] [2023-08-30 22:04:31,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:31,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:31,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:31,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:04:31,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 22:04:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:04:32,081 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:04:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:04:32,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:04:32,150 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:04:32,151 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-30 22:04:32,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-08-30 22:04:32,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-30 22:04:32,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 22:04:32,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 22:04:32,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 22:04:32,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 22:04:32,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:32,360 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:32,365 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 22:04:32,365 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 22:04:32,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 10:04:32 BasicIcfg [2023-08-30 22:04:32,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 22:04:32,402 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 22:04:32,402 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 22:04:32,402 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 22:04:32,403 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:04:20" (3/4) ... [2023-08-30 22:04:32,404 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-08-30 22:04:32,447 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 22:04:32,447 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 22:04:32,448 INFO L158 Benchmark]: Toolchain (without parser) took 12604.60ms. Allocated memory was 67.1MB in the beginning and 176.2MB in the end (delta: 109.1MB). Free memory was 39.4MB in the beginning and 55.1MB in the end (delta: -15.7MB). Peak memory consumption was 94.2MB. Max. memory is 16.1GB. [2023-08-30 22:04:32,448 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 67.1MB. Free memory is still 45.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 22:04:32,449 INFO L158 Benchmark]: CACSL2BoogieTranslator took 456.43ms. Allocated memory was 67.1MB in the beginning and 83.9MB in the end (delta: 16.8MB). Free memory was 39.3MB in the beginning and 54.4MB in the end (delta: -15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-08-30 22:04:32,449 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.41ms. Allocated memory is still 83.9MB. Free memory was 54.4MB in the beginning and 52.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 22:04:32,449 INFO L158 Benchmark]: Boogie Preprocessor took 58.90ms. Allocated memory is still 83.9MB. Free memory was 52.3MB in the beginning and 50.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 22:04:32,450 INFO L158 Benchmark]: RCFGBuilder took 479.50ms. Allocated memory is still 83.9MB. Free memory was 50.2MB in the beginning and 60.2MB in the end (delta: -10.0MB). Peak memory consumption was 19.0MB. Max. memory is 16.1GB. [2023-08-30 22:04:32,450 INFO L158 Benchmark]: TraceAbstraction took 11490.89ms. Allocated memory was 83.9MB in the beginning and 176.2MB in the end (delta: 92.3MB). Free memory was 59.6MB in the beginning and 61.4MB in the end (delta: -1.8MB). Peak memory consumption was 89.9MB. Max. memory is 16.1GB. [2023-08-30 22:04:32,450 INFO L158 Benchmark]: Witness Printer took 45.47ms. Allocated memory is still 176.2MB. Free memory was 61.4MB in the beginning and 55.1MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-08-30 22:04:32,452 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 67.1MB. Free memory is still 45.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 456.43ms. Allocated memory was 67.1MB in the beginning and 83.9MB in the end (delta: 16.8MB). Free memory was 39.3MB in the beginning and 54.4MB in the end (delta: -15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.41ms. Allocated memory is still 83.9MB. Free memory was 54.4MB in the beginning and 52.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 58.90ms. Allocated memory is still 83.9MB. Free memory was 52.3MB in the beginning and 50.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 479.50ms. Allocated memory is still 83.9MB. Free memory was 50.2MB in the beginning and 60.2MB in the end (delta: -10.0MB). Peak memory consumption was 19.0MB. Max. memory is 16.1GB. * TraceAbstraction took 11490.89ms. Allocated memory was 83.9MB in the beginning and 176.2MB in the end (delta: 92.3MB). Free memory was 59.6MB in the beginning and 61.4MB in the end (delta: -1.8MB). Peak memory consumption was 89.9MB. Max. memory is 16.1GB. * Witness Printer took 45.47ms. Allocated memory is still 176.2MB. Free memory was 61.4MB in the beginning and 55.1MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.4s, 126 PlacesBefore, 35 PlacesAfterwards, 129 TransitionsBefore, 34 TransitionsAfterwards, 3840 CoEnabledTransitionPairs, 7 FixpointIterations, 41 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 4 ChoiceCompositions, 111 TotalNumberOfCompositions, 8363 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4886, independent: 4600, independent conditional: 0, independent unconditional: 4600, dependent: 286, dependent conditional: 0, dependent unconditional: 286, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2137, independent: 2098, independent conditional: 0, independent unconditional: 2098, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4886, independent: 2502, independent conditional: 0, independent unconditional: 2502, dependent: 247, dependent conditional: 0, dependent unconditional: 247, unknown: 2137, unknown conditional: 0, unknown unconditional: 2137] , Statistics on independence cache: Total cache size (in pairs): 171, Positive cache size: 154, Positive conditional cache size: 0, Positive unconditional cache size: 154, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - 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={5:0}, id2={6:0}, 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={5:0}, id2={6:0}, 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: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 11.3s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1022 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 824 mSDsluCounter, 313 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 279 mSDsCounter, 91 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1882 IncrementalHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 91 mSolverCounterUnsat, 34 mSDtfsCounter, 1882 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=616occurred in iteration=7, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 91 ConstructedInterpolants, 18 QuantifiedInterpolants, 1018 SizeOfPredicates, 24 NumberOfNonLiveVariables, 840 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-30 22:04:32,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE