./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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 ../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.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 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:52:14,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:52:14,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:52:14,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:52:14,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:52:14,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:52:14,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:52:14,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:52:14,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:52:14,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:52:14,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:52:14,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:52:14,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:52:14,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:52:14,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:52:14,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:52:14,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:52:14,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:52:14,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:52:14,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:52:14,886 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:52:14,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:52:14,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:52:14,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:52:14,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:52:14,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:52:14,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:52:14,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:52:14,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:52:14,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:52:14,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:52:14,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:52:14,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:52:14,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:52:14,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:52:14,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:52:14,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:52:14,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:52:14,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:52:14,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:52:14,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:52:14,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:52:14,909 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:52:14,942 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:52:14,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:52:14,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:52:14,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:52:14,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:52:14,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:52:14,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:52:14,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:52:14,945 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:52:14,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:52:14,946 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:52:14,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:52:14,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:52:14,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:52:14,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:52:14,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:52:14,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:52:14,947 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:52:14,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:52:14,949 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:52:14,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:52:14,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:52:14,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:52:14,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:52:14,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:52:14,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:52:14,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:52:14,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:52:14,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:52:14,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:52:14,951 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:52:14,951 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:52:14,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:52:14,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f [2022-07-13 21:52:15,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:52:15,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:52:15,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:52:15,206 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:52:15,207 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:52:15,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2022-07-13 21:52:15,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3134bfde3/f07a0e252096426f9a8112ad11ff97ea/FLAG1a90cf691 [2022-07-13 21:52:15,889 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:52:15,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2022-07-13 21:52:15,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3134bfde3/f07a0e252096426f9a8112ad11ff97ea/FLAG1a90cf691 [2022-07-13 21:52:16,156 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3134bfde3/f07a0e252096426f9a8112ad11ff97ea [2022-07-13 21:52:16,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:52:16,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:52:16,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:52:16,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:52:16,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:52:16,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:52:16" (1/1) ... [2022-07-13 21:52:16,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60fa8794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:16, skipping insertion in model container [2022-07-13 21:52:16,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:52:16" (1/1) ... [2022-07-13 21:52:16,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:52:16,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:52:16,782 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2022-07-13 21:52:16,823 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2022-07-13 21:52:16,827 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2022-07-13 21:52:16,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:52:16,851 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:52:16,890 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2022-07-13 21:52:16,906 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2022-07-13 21:52:16,922 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2022-07-13 21:52:16,930 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:52:17,061 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:52:17,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:17 WrapperNode [2022-07-13 21:52:17,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:52:17,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:52:17,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:52:17,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:52:17,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:17" (1/1) ... [2022-07-13 21:52:17,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:17" (1/1) ... [2022-07-13 21:52:17,239 INFO L137 Inliner]: procedures = 489, calls = 128, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1729 [2022-07-13 21:52:17,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:52:17,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:52:17,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:52:17,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:52:17,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:17" (1/1) ... [2022-07-13 21:52:17,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:17" (1/1) ... [2022-07-13 21:52:17,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:17" (1/1) ... [2022-07-13 21:52:17,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:17" (1/1) ... [2022-07-13 21:52:17,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:17" (1/1) ... [2022-07-13 21:52:17,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:17" (1/1) ... [2022-07-13 21:52:17,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:17" (1/1) ... [2022-07-13 21:52:17,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:52:17,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:52:17,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:52:17,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:52:17,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:17" (1/1) ... [2022-07-13 21:52:17,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:52:17,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:52:17,413 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 21:52:17,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 21:52:17,444 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2022-07-13 21:52:17,445 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2022-07-13 21:52:17,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 21:52:17,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:52:17,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 21:52:17,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:52:17,445 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:52:17,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:52:17,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 21:52:17,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:52:17,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:52:17,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:52:17,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 21:52:17,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:52:17,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:52:17,449 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:52:17,697 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:52:17,698 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:52:19,431 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:52:19,765 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:52:19,766 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-13 21:52:19,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:52:19 BoogieIcfgContainer [2022-07-13 21:52:19,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:52:19,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:52:19,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:52:19,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:52:19,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:52:16" (1/3) ... [2022-07-13 21:52:19,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e77a3f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:52:19, skipping insertion in model container [2022-07-13 21:52:19,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:52:17" (2/3) ... [2022-07-13 21:52:19,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e77a3f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:52:19, skipping insertion in model container [2022-07-13 21:52:19,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:52:19" (3/3) ... [2022-07-13 21:52:19,778 INFO L111 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2022-07-13 21:52:19,784 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:52:19,793 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:52:19,794 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-07-13 21:52:19,794 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:52:19,936 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:52:19,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1635 places, 1684 transitions, 3376 flow [2022-07-13 21:52:20,999 INFO L129 PetriNetUnfolder]: 97/3125 cut-off events. [2022-07-13 21:52:21,000 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:52:21,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3131 conditions, 3125 events. 97/3125 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14512 event pairs, 0 based on Foata normal form. 0/3015 useless extension candidates. Maximal degree in co-relation 1594. Up to 10 conditions per place. [2022-07-13 21:52:21,047 INFO L82 GeneralOperation]: Start removeDead. Operand has 1635 places, 1684 transitions, 3376 flow [2022-07-13 21:52:21,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1635 places, 1684 transitions, 3376 flow [2022-07-13 21:52:21,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:52:21,100 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@57243c92, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@8ed406e [2022-07-13 21:52:21,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-13 21:52:21,118 INFO L129 PetriNetUnfolder]: 11/179 cut-off events. [2022-07-13 21:52:21,119 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:52:21,119 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:21,120 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:21,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:52:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:21,127 INFO L85 PathProgramCache]: Analyzing trace with hash -240515348, now seen corresponding path program 1 times [2022-07-13 21:52:21,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:21,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361783557] [2022-07-13 21:52:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:21,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:21,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:21,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361783557] [2022-07-13 21:52:21,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361783557] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:21,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:21,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:52:21,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951485633] [2022-07-13 21:52:21,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:21,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:52:21,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:21,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:52:21,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:52:21,600 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1611 out of 1684 [2022-07-13 21:52:21,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1635 places, 1684 transitions, 3376 flow. Second operand has 2 states, 2 states have (on average 1613.0) internal successors, (3226), 2 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:21,608 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:21,608 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1611 of 1684 [2022-07-13 21:52:21,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:24,183 INFO L129 PetriNetUnfolder]: 384/9309 cut-off events. [2022-07-13 21:52:24,184 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:52:24,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9783 conditions, 9309 events. 384/9309 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 79189 event pairs, 176 based on Foata normal form. 161/9221 useless extension candidates. Maximal degree in co-relation 8217. Up to 468 conditions per place. [2022-07-13 21:52:24,267 INFO L132 encePairwiseOnDemand]: 1668/1684 looper letters, 52 selfloop transitions, 0 changer transitions 0/1663 dead transitions. [2022-07-13 21:52:24,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1631 places, 1663 transitions, 3438 flow [2022-07-13 21:52:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:52:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:52:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3290 transitions. [2022-07-13 21:52:24,292 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9768408551068883 [2022-07-13 21:52:24,293 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3290 transitions. [2022-07-13 21:52:24,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3290 transitions. [2022-07-13 21:52:24,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:24,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3290 transitions. [2022-07-13 21:52:24,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1645.0) internal successors, (3290), 2 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:24,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1684.0) internal successors, (5052), 3 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:24,333 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1684.0) internal successors, (5052), 3 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:24,335 INFO L186 Difference]: Start difference. First operand has 1635 places, 1684 transitions, 3376 flow. Second operand 2 states and 3290 transitions. [2022-07-13 21:52:24,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1631 places, 1663 transitions, 3438 flow [2022-07-13 21:52:24,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1631 places, 1663 transitions, 3438 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:52:24,386 INFO L242 Difference]: Finished difference. Result has 1631 places, 1663 transitions, 3334 flow [2022-07-13 21:52:24,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=1630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3334, PETRI_PLACES=1631, PETRI_TRANSITIONS=1663} [2022-07-13 21:52:24,396 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, -4 predicate places. [2022-07-13 21:52:24,397 INFO L495 AbstractCegarLoop]: Abstraction has has 1631 places, 1663 transitions, 3334 flow [2022-07-13 21:52:24,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1613.0) internal successors, (3226), 2 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:24,400 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:24,400 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:24,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:52:24,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:52:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:24,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1112794349, now seen corresponding path program 1 times [2022-07-13 21:52:24,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:24,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846606915] [2022-07-13 21:52:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:24,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:24,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:24,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846606915] [2022-07-13 21:52:24,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846606915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:24,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:24,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:52:24,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954399521] [2022-07-13 21:52:24,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:24,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:52:24,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:24,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:52:24,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:52:24,568 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1573 out of 1684 [2022-07-13 21:52:24,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1631 places, 1663 transitions, 3334 flow. Second operand has 3 states, 3 states have (on average 1577.0) internal successors, (4731), 3 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:24,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:24,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1573 of 1684 [2022-07-13 21:52:24,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:29,265 INFO L129 PetriNetUnfolder]: 751/14656 cut-off events. [2022-07-13 21:52:29,266 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:52:29,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15742 conditions, 14656 events. 751/14656 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 131071 event pairs, 224 based on Foata normal form. 0/14284 useless extension candidates. Maximal degree in co-relation 15738. Up to 553 conditions per place. [2022-07-13 21:52:29,390 INFO L132 encePairwiseOnDemand]: 1666/1684 looper letters, 143 selfloop transitions, 12 changer transitions 9/1731 dead transitions. [2022-07-13 21:52:29,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1633 places, 1731 transitions, 3786 flow [2022-07-13 21:52:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:52:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:52:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4883 transitions. [2022-07-13 21:52:29,404 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.966547901821061 [2022-07-13 21:52:29,405 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 4883 transitions. [2022-07-13 21:52:29,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 4883 transitions. [2022-07-13 21:52:29,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:29,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 4883 transitions. [2022-07-13 21:52:29,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1627.6666666666667) internal successors, (4883), 3 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:29,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1684.0) internal successors, (6736), 4 states have internal predecessors, (6736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:29,433 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1684.0) internal successors, (6736), 4 states have internal predecessors, (6736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:29,433 INFO L186 Difference]: Start difference. First operand has 1631 places, 1663 transitions, 3334 flow. Second operand 3 states and 4883 transitions. [2022-07-13 21:52:29,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1633 places, 1731 transitions, 3786 flow [2022-07-13 21:52:29,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1633 places, 1731 transitions, 3786 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:52:29,468 INFO L242 Difference]: Finished difference. Result has 1634 places, 1660 transitions, 3382 flow [2022-07-13 21:52:29,472 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=1631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3382, PETRI_PLACES=1634, PETRI_TRANSITIONS=1660} [2022-07-13 21:52:29,474 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, -1 predicate places. [2022-07-13 21:52:29,474 INFO L495 AbstractCegarLoop]: Abstraction has has 1634 places, 1660 transitions, 3382 flow [2022-07-13 21:52:29,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1577.0) internal successors, (4731), 3 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:29,477 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:29,478 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:29,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:52:29,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:52:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:29,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1114349984, now seen corresponding path program 1 times [2022-07-13 21:52:29,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:29,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020661009] [2022-07-13 21:52:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:29,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:29,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:29,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020661009] [2022-07-13 21:52:29,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020661009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:52:29,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700642925] [2022-07-13 21:52:29,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:29,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:52:29,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:52:29,790 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:52:29,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:52:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:29,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:52:29,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:52:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:30,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:52:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:30,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700642925] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:52:30,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:52:30,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:52:30,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563241826] [2022-07-13 21:52:30,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:52:30,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:52:30,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:30,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:52:30,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:52:30,091 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1572 out of 1684 [2022-07-13 21:52:30,111 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1634 places, 1660 transitions, 3382 flow. Second operand has 10 states, 10 states have (on average 1574.9) internal successors, (15749), 10 states have internal predecessors, (15749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:30,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:30,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1572 of 1684 [2022-07-13 21:52:30,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:35,265 INFO L129 PetriNetUnfolder]: 869/15024 cut-off events. [2022-07-13 21:52:35,266 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-13 21:52:35,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16318 conditions, 15024 events. 869/15024 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 132848 event pairs, 174 based on Foata normal form. 2/14664 useless extension candidates. Maximal degree in co-relation 16312. Up to 577 conditions per place. [2022-07-13 21:52:35,409 INFO L132 encePairwiseOnDemand]: 1663/1684 looper letters, 141 selfloop transitions, 26 changer transitions 2/1735 dead transitions. [2022-07-13 21:52:35,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1635 places, 1735 transitions, 3872 flow [2022-07-13 21:52:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:52:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:52:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14319 transitions. [2022-07-13 21:52:35,437 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9447743467933492 [2022-07-13 21:52:35,438 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 14319 transitions. [2022-07-13 21:52:35,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 14319 transitions. [2022-07-13 21:52:35,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:35,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 14319 transitions. [2022-07-13 21:52:35,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1591.0) internal successors, (14319), 9 states have internal predecessors, (14319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:35,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1684.0) internal successors, (16840), 10 states have internal predecessors, (16840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:35,503 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1684.0) internal successors, (16840), 10 states have internal predecessors, (16840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:35,503 INFO L186 Difference]: Start difference. First operand has 1634 places, 1660 transitions, 3382 flow. Second operand 9 states and 14319 transitions. [2022-07-13 21:52:35,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1635 places, 1735 transitions, 3872 flow [2022-07-13 21:52:35,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1634 places, 1735 transitions, 3860 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:52:35,537 INFO L242 Difference]: Finished difference. Result has 1637 places, 1670 transitions, 3496 flow [2022-07-13 21:52:35,540 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=1626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3496, PETRI_PLACES=1637, PETRI_TRANSITIONS=1670} [2022-07-13 21:52:35,543 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, 2 predicate places. [2022-07-13 21:52:35,543 INFO L495 AbstractCegarLoop]: Abstraction has has 1637 places, 1670 transitions, 3496 flow [2022-07-13 21:52:35,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1574.9) internal successors, (15749), 10 states have internal predecessors, (15749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:35,548 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:35,548 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:35,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:52:35,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:52:35,764 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:52:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:35,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1947084294, now seen corresponding path program 2 times [2022-07-13 21:52:35,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:35,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072550431] [2022-07-13 21:52:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:35,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:35,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:35,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072550431] [2022-07-13 21:52:35,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072550431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:52:35,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950787599] [2022-07-13 21:52:35,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:52:35,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:52:35,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:52:35,977 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:52:35,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:52:36,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:52:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:52:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:52:36,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:52:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:36,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:52:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:52:36,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950787599] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:52:36,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:52:36,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-13 21:52:36,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308479115] [2022-07-13 21:52:36,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:52:36,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 21:52:36,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 21:52:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:52:36,500 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1572 out of 1684 [2022-07-13 21:52:36,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1637 places, 1670 transitions, 3496 flow. Second operand has 11 states, 11 states have (on average 1574.909090909091) internal successors, (17324), 11 states have internal predecessors, (17324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:36,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:36,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1572 of 1684 [2022-07-13 21:52:36,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:41,833 INFO L129 PetriNetUnfolder]: 793/16490 cut-off events. [2022-07-13 21:52:41,833 INFO L130 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-07-13 21:52:41,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17857 conditions, 16490 events. 793/16490 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 148281 event pairs, 420 based on Foata normal form. 1/16097 useless extension candidates. Maximal degree in co-relation 17849. Up to 523 conditions per place. [2022-07-13 21:52:41,933 INFO L132 encePairwiseOnDemand]: 1664/1684 looper letters, 143 selfloop transitions, 29 changer transitions 0/1738 dead transitions. [2022-07-13 21:52:41,933 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1648 places, 1738 transitions, 3994 flow [2022-07-13 21:52:41,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 21:52:41,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-13 21:52:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 19037 transitions. [2022-07-13 21:52:41,965 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9420526524148852 [2022-07-13 21:52:41,966 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 19037 transitions. [2022-07-13 21:52:41,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 19037 transitions. [2022-07-13 21:52:41,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:41,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 19037 transitions. [2022-07-13 21:52:42,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 1586.4166666666667) internal successors, (19037), 12 states have internal predecessors, (19037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:42,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1684.0) internal successors, (21892), 13 states have internal predecessors, (21892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:42,037 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1684.0) internal successors, (21892), 13 states have internal predecessors, (21892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:42,037 INFO L186 Difference]: Start difference. First operand has 1637 places, 1670 transitions, 3496 flow. Second operand 12 states and 19037 transitions. [2022-07-13 21:52:42,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1648 places, 1738 transitions, 3994 flow [2022-07-13 21:52:42,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1647 places, 1738 transitions, 3970 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:52:42,074 INFO L242 Difference]: Finished difference. Result has 1651 places, 1674 transitions, 3589 flow [2022-07-13 21:52:42,077 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=1636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3589, PETRI_PLACES=1651, PETRI_TRANSITIONS=1674} [2022-07-13 21:52:42,078 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, 16 predicate places. [2022-07-13 21:52:42,079 INFO L495 AbstractCegarLoop]: Abstraction has has 1651 places, 1674 transitions, 3589 flow [2022-07-13 21:52:42,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1574.909090909091) internal successors, (17324), 11 states have internal predecessors, (17324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:42,083 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:42,084 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:42,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:52:42,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-13 21:52:42,300 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:52:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash 713479225, now seen corresponding path program 3 times [2022-07-13 21:52:42,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:42,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460371514] [2022-07-13 21:52:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:42,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:52:42,374 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:52:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:52:42,477 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:52:42,478 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:52:42,480 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-13 21:52:42,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-13 21:52:42,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-13 21:52:42,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-13 21:52:42,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-13 21:52:42,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-13 21:52:42,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:52:42,487 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-07-13 21:52:42,490 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:52:42,490 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:52:42,638 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:52:42,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1782 places, 1834 transitions, 3686 flow [2022-07-13 21:52:44,060 INFO L129 PetriNetUnfolder]: 152/4761 cut-off events. [2022-07-13 21:52:44,060 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:52:44,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4775 conditions, 4761 events. 152/4761 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 27571 event pairs, 0 based on Foata normal form. 0/4589 useless extension candidates. Maximal degree in co-relation 3127. Up to 15 conditions per place. [2022-07-13 21:52:44,127 INFO L82 GeneralOperation]: Start removeDead. Operand has 1782 places, 1834 transitions, 3686 flow [2022-07-13 21:52:44,147 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1782 places, 1834 transitions, 3686 flow [2022-07-13 21:52:44,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:52:44,149 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@57243c92, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@8ed406e [2022-07-13 21:52:44,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-13 21:52:44,160 INFO L129 PetriNetUnfolder]: 12/200 cut-off events. [2022-07-13 21:52:44,161 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:52:44,161 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:44,161 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:44,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:52:44,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:44,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1822763458, now seen corresponding path program 1 times [2022-07-13 21:52:44,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:44,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813485264] [2022-07-13 21:52:44,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:44,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:52:44,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:44,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813485264] [2022-07-13 21:52:44,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813485264] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:44,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:44,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:52:44,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059365925] [2022-07-13 21:52:44,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:44,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:52:44,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:44,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:52:44,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:52:44,215 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1754 out of 1834 [2022-07-13 21:52:44,218 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1782 places, 1834 transitions, 3686 flow. Second operand has 2 states, 2 states have (on average 1756.5) internal successors, (3513), 2 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:44,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:44,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1754 of 1834 [2022-07-13 21:52:44,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:56,672 INFO L129 PetriNetUnfolder]: 3062/49401 cut-off events. [2022-07-13 21:52:56,672 INFO L130 PetriNetUnfolder]: For 69/73 co-relation queries the response was YES. [2022-07-13 21:52:57,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52938 conditions, 49401 events. 3062/49401 cut-off events. For 69/73 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 639683 event pairs, 1964 based on Foata normal form. 1133/49213 useless extension candidates. Maximal degree in co-relation 9703. Up to 3491 conditions per place. [2022-07-13 21:52:57,429 INFO L132 encePairwiseOnDemand]: 1817/1834 looper letters, 58 selfloop transitions, 0 changer transitions 0/1812 dead transitions. [2022-07-13 21:52:57,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1778 places, 1812 transitions, 3758 flow [2022-07-13 21:52:57,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:52:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:52:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3583 transitions. [2022-07-13 21:52:57,442 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9768266085059978 [2022-07-13 21:52:57,442 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3583 transitions. [2022-07-13 21:52:57,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3583 transitions. [2022-07-13 21:52:57,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:57,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3583 transitions. [2022-07-13 21:52:57,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1791.5) internal successors, (3583), 2 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:57,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1834.0) internal successors, (5502), 3 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:57,463 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1834.0) internal successors, (5502), 3 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:57,464 INFO L186 Difference]: Start difference. First operand has 1782 places, 1834 transitions, 3686 flow. Second operand 2 states and 3583 transitions. [2022-07-13 21:52:57,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1778 places, 1812 transitions, 3758 flow [2022-07-13 21:52:57,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1778 places, 1812 transitions, 3758 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:52:57,498 INFO L242 Difference]: Finished difference. Result has 1778 places, 1812 transitions, 3642 flow [2022-07-13 21:52:57,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1834, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=1777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3642, PETRI_PLACES=1778, PETRI_TRANSITIONS=1812} [2022-07-13 21:52:57,506 INFO L279 CegarLoopForPetriNet]: 1782 programPoint places, -4 predicate places. [2022-07-13 21:52:57,509 INFO L495 AbstractCegarLoop]: Abstraction has has 1778 places, 1812 transitions, 3642 flow [2022-07-13 21:52:57,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1756.5) internal successors, (3513), 2 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:57,511 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:57,511 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:57,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:52:57,512 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-13 21:52:57,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:57,514 INFO L85 PathProgramCache]: Analyzing trace with hash 534649925, now seen corresponding path program 1 times [2022-07-13 21:52:57,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:57,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050354156] [2022-07-13 21:52:57,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:57,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:52:57,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:57,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050354156] [2022-07-13 21:52:57,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050354156] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:57,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:57,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:52:57,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509921148] [2022-07-13 21:52:57,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:57,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:52:57,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:57,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:52:57,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:52:57,586 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1716 out of 1834 [2022-07-13 21:52:57,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1778 places, 1812 transitions, 3642 flow. Second operand has 3 states, 3 states have (on average 1721.6666666666667) internal successors, (5165), 3 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:57,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:57,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1716 of 1834 [2022-07-13 21:52:57,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand