./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.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-ext/26_stack_cas.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 fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d --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 16:26:34,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:26:34,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:26:34,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:26:34,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:26:34,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:26:34,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:26:34,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:26:34,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:26:34,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:26:34,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:26:34,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:26:34,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:26:34,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:26:34,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:26:34,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:26:34,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:26:34,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:26:34,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:26:34,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:26:34,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:26:34,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:26:34,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:26:34,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:26:34,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:26:34,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:26:34,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:26:34,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:26:34,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:26:34,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:26:34,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:26:34,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:26:34,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:26:34,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:26:34,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:26:34,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:26:34,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:26:34,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:26:34,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:26:34,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:26:34,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:26:34,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:26:34,892 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:26:34,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:26:34,893 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:26:34,893 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:26:34,894 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:26:34,894 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:26:34,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:26:34,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:26:34,894 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:26:34,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:26:34,895 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:26:34,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:26:34,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:26:34,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:26:34,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:26:34,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:26:34,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:26:34,897 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:26:34,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:26:34,897 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:26:34,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:26:34,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:26:34,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:26:34,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:26:34,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:26:34,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:26:34,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:26:34,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:26:34,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:26:34,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:26:34,899 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:26:34,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:26:34,899 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:26:34,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:26:34,899 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:26:34,899 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:26:35,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:26:35,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:26:35,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:26:35,145 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:26:35,145 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:26:35,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-08-30 16:26:36,014 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:26:36,176 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:26:36,176 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-08-30 16:26:36,187 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6128c8dfa/1fc6601ac4a14d98a79f80ae444ec329/FLAGa38897174 [2023-08-30 16:26:36,196 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6128c8dfa/1fc6601ac4a14d98a79f80ae444ec329 [2023-08-30 16:26:36,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:26:36,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:26:36,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:26:36,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:26:36,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:26:36,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:26:36" (1/1) ... [2023-08-30 16:26:36,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eeeadfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:26:36, skipping insertion in model container [2023-08-30 16:26:36,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:26:36" (1/1) ... [2023-08-30 16:26:36,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:26:36,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:26:36,480 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31152,31165] [2023-08-30 16:26:36,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:26:36,496 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:26:36,540 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31152,31165] [2023-08-30 16:26:36,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:26:36,578 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:26:36,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:26:36 WrapperNode [2023-08-30 16:26:36,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:26:36,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:26:36,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:26:36,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:26:36,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:26:36" (1/1) ... [2023-08-30 16:26:36,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:26:36" (1/1) ... [2023-08-30 16:26:36,631 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2023-08-30 16:26:36,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:26:36,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:26:36,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:26:36,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:26:36,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:26:36" (1/1) ... [2023-08-30 16:26:36,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:26:36" (1/1) ... [2023-08-30 16:26:36,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:26:36" (1/1) ... [2023-08-30 16:26:36,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:26:36" (1/1) ... [2023-08-30 16:26:36,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:26:36" (1/1) ... [2023-08-30 16:26:36,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:26:36" (1/1) ... [2023-08-30 16:26:36,656 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:26:36" (1/1) ... [2023-08-30 16:26:36,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:26:36" (1/1) ... [2023-08-30 16:26:36,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:26:36,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:26:36,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:26:36,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:26:36,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:26:36" (1/1) ... [2023-08-30 16:26:36,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:26:36,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:26:36,686 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 16:26:36,688 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 16:26:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 16:26:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 16:26:36,709 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 16:26:36,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:26:36,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:26:36,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:26:36,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:26:36,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:26:36,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:26:36,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:26:36,712 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 16:26:36,858 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:26:36,860 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:26:37,036 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:26:37,140 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:26:37,141 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 16:26:37,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:26:37 BoogieIcfgContainer [2023-08-30 16:26:37,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:26:37,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:26:37,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:26:37,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:26:37,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:26:36" (1/3) ... [2023-08-30 16:26:37,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db5a20d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:26:37, skipping insertion in model container [2023-08-30 16:26:37,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:26:36" (2/3) ... [2023-08-30 16:26:37,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db5a20d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:26:37, skipping insertion in model container [2023-08-30 16:26:37,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:26:37" (3/3) ... [2023-08-30 16:26:37,147 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2023-08-30 16:26:37,152 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:26:37,158 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:26:37,158 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 16:26:37,158 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:26:37,236 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:26:37,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:26:37,293 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-08-30 16:26:37,293 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:26:37,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-30 16:26:37,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:26:37,300 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-08-30 16:26:37,302 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:26:37,308 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-30 16:26:37,309 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-30 16:26:37,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:26:37,331 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-08-30 16:26:37,332 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:26:37,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-30 16:26:37,334 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-08-30 16:26:40,398 INFO L134 LiptonReduction]: Checked pairs total: 2167 [2023-08-30 16:26:40,398 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-30 16:26:40,407 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:26:40,411 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;@29f3386b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:26:40,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:26:40,415 INFO L130 PetriNetUnfolder]: 5/25 cut-off events. [2023-08-30 16:26:40,415 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:26:40,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:26:40,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:26:40,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:26:40,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:26:40,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1286972708, now seen corresponding path program 1 times [2023-08-30 16:26:40,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:26:40,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730843280] [2023-08-30 16:26:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:40,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:26:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:40,608 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 16:26:40,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:26:40,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730843280] [2023-08-30 16:26:40,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730843280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:26:40,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:26:40,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:26:40,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148279073] [2023-08-30 16:26:40,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:26:40,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:26:40,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:26:40,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:26:40,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:26:40,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 218 [2023-08-30 16:26:40,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 28 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 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 16:26:40,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:26:40,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 218 [2023-08-30 16:26:40,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:26:40,703 INFO L130 PetriNetUnfolder]: 42/93 cut-off events. [2023-08-30 16:26:40,703 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:26:40,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 93 events. 42/93 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 185 event pairs, 2 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 178. Up to 83 conditions per place. [2023-08-30 16:26:40,705 INFO L137 encePairwiseOnDemand]: 212/218 looper letters, 22 selfloop transitions, 2 changer transitions 1/26 dead transitions. [2023-08-30 16:26:40,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 26 transitions, 107 flow [2023-08-30 16:26:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:26:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:26:40,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-08-30 16:26:40,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908256880733945 [2023-08-30 16:26:40,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-08-30 16:26:40,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-08-30 16:26:40,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:26:40,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-08-30 16:26:40,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:26:40,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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 16:26:40,736 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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 16:26:40,737 INFO L175 Difference]: Start difference. First operand has 24 places, 28 transitions, 61 flow. Second operand 3 states and 321 transitions. [2023-08-30 16:26:40,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 26 transitions, 107 flow [2023-08-30 16:26:40,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:26:40,740 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 55 flow [2023-08-30 16:26:40,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-08-30 16:26:40,743 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2023-08-30 16:26:40,744 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 55 flow [2023-08-30 16:26:40,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 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 16:26:40,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:26:40,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:26:40,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:26:40,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:26:40,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:26:40,747 INFO L85 PathProgramCache]: Analyzing trace with hash -342307077, now seen corresponding path program 1 times [2023-08-30 16:26:40,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:26:40,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341958513] [2023-08-30 16:26:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:40,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:26:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:40,841 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 16:26:40,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:26:40,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341958513] [2023-08-30 16:26:40,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341958513] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:26:40,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:26:40,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:26:40,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86108923] [2023-08-30 16:26:40,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:26:40,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:26:40,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:26:40,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:26:40,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:26:40,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 218 [2023-08-30 16:26:40,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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 16:26:40,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:26:40,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 218 [2023-08-30 16:26:40,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:26:40,894 INFO L130 PetriNetUnfolder]: 50/113 cut-off events. [2023-08-30 16:26:40,895 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:26:40,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 113 events. 50/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 257 event pairs, 14 based on Foata normal form. 3/101 useless extension candidates. Maximal degree in co-relation 221. Up to 73 conditions per place. [2023-08-30 16:26:40,896 INFO L137 encePairwiseOnDemand]: 215/218 looper letters, 26 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2023-08-30 16:26:40,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 127 flow [2023-08-30 16:26:40,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:26:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:26:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2023-08-30 16:26:40,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48623853211009177 [2023-08-30 16:26:40,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2023-08-30 16:26:40,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2023-08-30 16:26:40,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:26:40,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2023-08-30 16:26:40,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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 16:26:40,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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 16:26:40,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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 16:26:40,903 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 55 flow. Second operand 3 states and 318 transitions. [2023-08-30 16:26:40,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 127 flow [2023-08-30 16:26:40,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 123 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:26:40,905 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 63 flow [2023-08-30 16:26:40,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-08-30 16:26:40,906 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2023-08-30 16:26:40,906 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 63 flow [2023-08-30 16:26:40,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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 16:26:40,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:26:40,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:26:40,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:26:40,907 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:26:40,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:26:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash -339227072, now seen corresponding path program 1 times [2023-08-30 16:26:40,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:26:40,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300021722] [2023-08-30 16:26:40,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:40,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:26:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:41,039 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 16:26:41,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:26:41,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300021722] [2023-08-30 16:26:41,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300021722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:26:41,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:26:41,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:26:41,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562857109] [2023-08-30 16:26:41,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:26:41,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:26:41,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:26:41,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:26:41,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:26:41,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 218 [2023-08-30 16:26:41,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 63 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 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 16:26:41,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:26:41,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 218 [2023-08-30 16:26:41,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:26:41,159 INFO L130 PetriNetUnfolder]: 71/161 cut-off events. [2023-08-30 16:26:41,159 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:26:41,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 161 events. 71/161 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 325 event pairs, 12 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 326. Up to 73 conditions per place. [2023-08-30 16:26:41,162 INFO L137 encePairwiseOnDemand]: 212/218 looper letters, 39 selfloop transitions, 5 changer transitions 1/46 dead transitions. [2023-08-30 16:26:41,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 46 transitions, 197 flow [2023-08-30 16:26:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:26:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:26:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 580 transitions. [2023-08-30 16:26:41,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434250764525994 [2023-08-30 16:26:41,164 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 580 transitions. [2023-08-30 16:26:41,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 580 transitions. [2023-08-30 16:26:41,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:26:41,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 580 transitions. [2023-08-30 16:26:41,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 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 16:26:41,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 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 16:26:41,168 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 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 16:26:41,168 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 63 flow. Second operand 6 states and 580 transitions. [2023-08-30 16:26:41,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 46 transitions, 197 flow [2023-08-30 16:26:41,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:26:41,169 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 91 flow [2023-08-30 16:26:41,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=91, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-30 16:26:41,170 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 8 predicate places. [2023-08-30 16:26:41,170 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 91 flow [2023-08-30 16:26:41,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 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 16:26:41,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:26:41,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:26:41,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:26:41,172 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:26:41,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:26:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash 85896053, now seen corresponding path program 1 times [2023-08-30 16:26:41,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:26:41,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016686670] [2023-08-30 16:26:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:41,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:26:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:41,575 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 16:26:41,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:26:41,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016686670] [2023-08-30 16:26:41,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016686670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:26:41,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:26:41,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 16:26:41,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839682194] [2023-08-30 16:26:41,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:26:41,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:26:41,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:26:41,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:26:41,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:26:41,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 218 [2023-08-30 16:26:41,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 91 flow. Second operand has 10 states, 10 states have (on average 73.6) internal successors, (736), 10 states have internal predecessors, (736), 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 16:26:41,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:26:41,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 218 [2023-08-30 16:26:41,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:26:41,915 INFO L130 PetriNetUnfolder]: 110/258 cut-off events. [2023-08-30 16:26:41,915 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 16:26:41,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 258 events. 110/258 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 760 event pairs, 6 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 561. Up to 88 conditions per place. [2023-08-30 16:26:41,917 INFO L137 encePairwiseOnDemand]: 206/218 looper letters, 47 selfloop transitions, 20 changer transitions 1/69 dead transitions. [2023-08-30 16:26:41,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 69 transitions, 328 flow [2023-08-30 16:26:41,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 16:26:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 16:26:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 858 transitions. [2023-08-30 16:26:41,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3577981651376147 [2023-08-30 16:26:41,921 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 858 transitions. [2023-08-30 16:26:41,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 858 transitions. [2023-08-30 16:26:41,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:26:41,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 858 transitions. [2023-08-30 16:26:41,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 78.0) internal successors, (858), 11 states have internal predecessors, (858), 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 16:26:41,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 218.0) internal successors, (2616), 12 states have internal predecessors, (2616), 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 16:26:41,926 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 218.0) internal successors, (2616), 12 states have internal predecessors, (2616), 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 16:26:41,927 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 91 flow. Second operand 11 states and 858 transitions. [2023-08-30 16:26:41,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 69 transitions, 328 flow [2023-08-30 16:26:41,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 69 transitions, 323 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:26:41,928 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 214 flow [2023-08-30 16:26:41,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=214, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-30 16:26:41,929 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2023-08-30 16:26:41,929 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 214 flow [2023-08-30 16:26:41,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 73.6) internal successors, (736), 10 states have internal predecessors, (736), 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 16:26:41,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:26:41,930 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:26:41,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:26:41,930 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:26:41,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:26:41,931 INFO L85 PathProgramCache]: Analyzing trace with hash -740293209, now seen corresponding path program 1 times [2023-08-30 16:26:41,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:26:41,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60112719] [2023-08-30 16:26:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:41,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:26:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:26:42,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:26:42,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60112719] [2023-08-30 16:26:42,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60112719] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:26:42,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375475869] [2023-08-30 16:26:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:42,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:26:42,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:26:42,249 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 16:26:42,250 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 16:26:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:42,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 16:26:42,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:26:42,410 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:26:42,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:26:42,650 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 16:26:42,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-08-30 16:26:42,696 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 14 treesize of output 16 [2023-08-30 16:26:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:26:42,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:26:42,898 INFO L321 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2023-08-30 16:26:42,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 38 [2023-08-30 16:26:42,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:26:42,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2023-08-30 16:26:42,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 treesize of output 18 [2023-08-30 16:26:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:26:43,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375475869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:26:43,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:26:43,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-08-30 16:26:43,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059362853] [2023-08-30 16:26:43,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:26:43,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 16:26:43,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:26:43,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 16:26:43,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=472, Unknown=7, NotChecked=0, Total=552 [2023-08-30 16:26:43,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 218 [2023-08-30 16:26:43,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 214 flow. Second operand has 24 states, 24 states have (on average 56.166666666666664) internal successors, (1348), 24 states have internal predecessors, (1348), 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 16:26:43,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:26:43,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 218 [2023-08-30 16:26:43,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:26:44,733 INFO L130 PetriNetUnfolder]: 250/615 cut-off events. [2023-08-30 16:26:44,733 INFO L131 PetriNetUnfolder]: For 693/693 co-relation queries the response was YES. [2023-08-30 16:26:44,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2030 conditions, 615 events. 250/615 cut-off events. For 693/693 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2207 event pairs, 14 based on Foata normal form. 10/586 useless extension candidates. Maximal degree in co-relation 1958. Up to 117 conditions per place. [2023-08-30 16:26:44,737 INFO L137 encePairwiseOnDemand]: 205/218 looper letters, 152 selfloop transitions, 81 changer transitions 1/235 dead transitions. [2023-08-30 16:26:44,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 235 transitions, 1574 flow [2023-08-30 16:26:44,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 16:26:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 16:26:44,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2323 transitions. [2023-08-30 16:26:44,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27322982827569986 [2023-08-30 16:26:44,743 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2323 transitions. [2023-08-30 16:26:44,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2323 transitions. [2023-08-30 16:26:44,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:26:44,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2323 transitions. [2023-08-30 16:26:44,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 59.56410256410256) internal successors, (2323), 39 states have internal predecessors, (2323), 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 16:26:44,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 218.0) internal successors, (8720), 40 states have internal predecessors, (8720), 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 16:26:44,755 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 218.0) internal successors, (8720), 40 states have internal predecessors, (8720), 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 16:26:44,755 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 214 flow. Second operand 39 states and 2323 transitions. [2023-08-30 16:26:44,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 235 transitions, 1574 flow [2023-08-30 16:26:44,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 235 transitions, 1548 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-30 16:26:44,761 INFO L231 Difference]: Finished difference. Result has 96 places, 117 transitions, 913 flow [2023-08-30 16:26:44,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=913, PETRI_PLACES=96, PETRI_TRANSITIONS=117} [2023-08-30 16:26:44,762 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 72 predicate places. [2023-08-30 16:26:44,762 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 117 transitions, 913 flow [2023-08-30 16:26:44,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 56.166666666666664) internal successors, (1348), 24 states have internal predecessors, (1348), 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 16:26:44,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:26:44,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:26:44,775 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 16:26:44,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:26:44,971 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:26:44,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:26:44,972 INFO L85 PathProgramCache]: Analyzing trace with hash 891701287, now seen corresponding path program 1 times [2023-08-30 16:26:44,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:26:44,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916521301] [2023-08-30 16:26:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:44,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:26:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:26:45,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:26:45,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916521301] [2023-08-30 16:26:45,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916521301] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:26:45,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040873823] [2023-08-30 16:26:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:45,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:26:45,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:26:45,042 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 16:26:45,044 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 16:26:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:45,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 16:26:45,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:26:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:26:45,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:26:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:26:45,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040873823] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:26:45,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:26:45,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 16:26:45,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850009755] [2023-08-30 16:26:45,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:26:45,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:26:45,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:26:45,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:26:45,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:26:45,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 218 [2023-08-30 16:26:45,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 117 transitions, 913 flow. Second operand has 7 states, 7 states have (on average 102.42857142857143) internal successors, (717), 7 states have internal predecessors, (717), 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 16:26:45,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:26:45,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 218 [2023-08-30 16:26:45,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:26:45,364 INFO L130 PetriNetUnfolder]: 319/797 cut-off events. [2023-08-30 16:26:45,365 INFO L131 PetriNetUnfolder]: For 3316/3316 co-relation queries the response was YES. [2023-08-30 16:26:45,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3448 conditions, 797 events. 319/797 cut-off events. For 3316/3316 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2803 event pairs, 20 based on Foata normal form. 15/774 useless extension candidates. Maximal degree in co-relation 3358. Up to 404 conditions per place. [2023-08-30 16:26:45,371 INFO L137 encePairwiseOnDemand]: 214/218 looper letters, 155 selfloop transitions, 18 changer transitions 4/178 dead transitions. [2023-08-30 16:26:45,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 178 transitions, 1698 flow [2023-08-30 16:26:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:26:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:26:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 646 transitions. [2023-08-30 16:26:45,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4938837920489297 [2023-08-30 16:26:45,374 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 646 transitions. [2023-08-30 16:26:45,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 646 transitions. [2023-08-30 16:26:45,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:26:45,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 646 transitions. [2023-08-30 16:26:45,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.66666666666667) internal successors, (646), 6 states have internal predecessors, (646), 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 16:26:45,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 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 16:26:45,377 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 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 16:26:45,377 INFO L175 Difference]: Start difference. First operand has 96 places, 117 transitions, 913 flow. Second operand 6 states and 646 transitions. [2023-08-30 16:26:45,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 178 transitions, 1698 flow [2023-08-30 16:26:45,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 178 transitions, 1504 flow, removed 83 selfloop flow, removed 8 redundant places. [2023-08-30 16:26:45,389 INFO L231 Difference]: Finished difference. Result has 96 places, 120 transitions, 879 flow [2023-08-30 16:26:45,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=879, PETRI_PLACES=96, PETRI_TRANSITIONS=120} [2023-08-30 16:26:45,391 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 72 predicate places. [2023-08-30 16:26:45,391 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 120 transitions, 879 flow [2023-08-30 16:26:45,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 102.42857142857143) internal successors, (717), 7 states have internal predecessors, (717), 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 16:26:45,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:26:45,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:26:45,398 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 16:26:45,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 16:26:45,599 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:26:45,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:26:45,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1946686449, now seen corresponding path program 1 times [2023-08-30 16:26:45,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:26:45,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862820541] [2023-08-30 16:26:45,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:45,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:26:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:26:46,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:26:46,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862820541] [2023-08-30 16:26:46,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862820541] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:26:46,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511177376] [2023-08-30 16:26:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:46,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:26:46,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:26:46,311 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 16:26:46,312 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 16:26:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:46,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 16:26:46,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:26:46,662 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-08-30 16:26:46,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2023-08-30 16:26:46,685 INFO L321 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2023-08-30 16:26:46,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 85 [2023-08-30 16:26:46,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 16:26:46,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 16:26:46,741 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 17 treesize of output 6 [2023-08-30 16:26:46,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 16:26:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:26:46,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:26:47,008 INFO L321 Elim1Store]: treesize reduction 26, result has 65.3 percent of original size [2023-08-30 16:26:47,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 111 [2023-08-30 16:26:47,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:26:47,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2023-08-30 16:26:47,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-08-30 16:26:47,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:26:47,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 257 [2023-08-30 16:26:47,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:26:47,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 92 [2023-08-30 16:26:47,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:26:47,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 87 [2023-08-30 16:26:47,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:26:47,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 85 [2023-08-30 16:26:47,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 6 treesize of output 4 [2023-08-30 16:26:47,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-08-30 16:26:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:26:47,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511177376] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:26:47,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:26:47,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 29 [2023-08-30 16:26:47,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491543042] [2023-08-30 16:26:47,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:26:47,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 16:26:47,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:26:47,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 16:26:47,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2023-08-30 16:26:49,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 218 [2023-08-30 16:26:49,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 120 transitions, 879 flow. Second operand has 31 states, 31 states have (on average 69.64516129032258) internal successors, (2159), 31 states have internal predecessors, (2159), 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 16:26:49,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:26:49,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 218 [2023-08-30 16:26:49,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:26:52,008 INFO L130 PetriNetUnfolder]: 357/969 cut-off events. [2023-08-30 16:26:52,009 INFO L131 PetriNetUnfolder]: For 3749/3749 co-relation queries the response was YES. [2023-08-30 16:26:52,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3991 conditions, 969 events. 357/969 cut-off events. For 3749/3749 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4074 event pairs, 9 based on Foata normal form. 9/933 useless extension candidates. Maximal degree in co-relation 3828. Up to 404 conditions per place. [2023-08-30 16:26:52,015 INFO L137 encePairwiseOnDemand]: 202/218 looper letters, 175 selfloop transitions, 139 changer transitions 15/330 dead transitions. [2023-08-30 16:26:52,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 330 transitions, 2919 flow [2023-08-30 16:26:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-30 16:26:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-30 16:26:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3829 transitions. [2023-08-30 16:26:52,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32526333673122665 [2023-08-30 16:26:52,043 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3829 transitions. [2023-08-30 16:26:52,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3829 transitions. [2023-08-30 16:26:52,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:26:52,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3829 transitions. [2023-08-30 16:26:52,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 70.9074074074074) internal successors, (3829), 54 states have internal predecessors, (3829), 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 16:26:52,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 218.0) internal successors, (11990), 55 states have internal predecessors, (11990), 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 16:26:52,063 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 218.0) internal successors, (11990), 55 states have internal predecessors, (11990), 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 16:26:52,063 INFO L175 Difference]: Start difference. First operand has 96 places, 120 transitions, 879 flow. Second operand 54 states and 3829 transitions. [2023-08-30 16:26:52,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 330 transitions, 2919 flow [2023-08-30 16:26:52,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 330 transitions, 2906 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 16:26:52,081 INFO L231 Difference]: Finished difference. Result has 168 places, 236 transitions, 2434 flow [2023-08-30 16:26:52,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=2434, PETRI_PLACES=168, PETRI_TRANSITIONS=236} [2023-08-30 16:26:52,082 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 144 predicate places. [2023-08-30 16:26:52,082 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 236 transitions, 2434 flow [2023-08-30 16:26:52,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 69.64516129032258) internal successors, (2159), 31 states have internal predecessors, (2159), 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 16:26:52,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:26:52,083 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:26:52,089 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 16:26:52,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:26:52,290 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:26:52,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:26:52,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1293322667, now seen corresponding path program 2 times [2023-08-30 16:26:52,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:26:52,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265379406] [2023-08-30 16:26:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:52,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:26:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-08-30 16:26:52,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:26:52,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265379406] [2023-08-30 16:26:52,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265379406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:26:52,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:26:52,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:26:52,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227958413] [2023-08-30 16:26:52,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:26:52,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:26:52,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:26:52,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:26:52,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:26:52,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 218 [2023-08-30 16:26:52,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 236 transitions, 2434 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:26:52,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:26:52,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 218 [2023-08-30 16:26:52,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:26:52,587 INFO L130 PetriNetUnfolder]: 440/1171 cut-off events. [2023-08-30 16:26:52,587 INFO L131 PetriNetUnfolder]: For 6331/6331 co-relation queries the response was YES. [2023-08-30 16:26:52,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6026 conditions, 1171 events. 440/1171 cut-off events. For 6331/6331 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 5127 event pairs, 141 based on Foata normal form. 6/1163 useless extension candidates. Maximal degree in co-relation 5934. Up to 856 conditions per place. [2023-08-30 16:26:52,595 INFO L137 encePairwiseOnDemand]: 215/218 looper letters, 288 selfloop transitions, 9 changer transitions 0/298 dead transitions. [2023-08-30 16:26:52,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 298 transitions, 3564 flow [2023-08-30 16:26:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:26:52,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:26:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-30 16:26:52,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 16:26:52,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-30 16:26:52,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-30 16:26:52,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:26:52,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-30 16:26:52,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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 16:26:52,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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 16:26:52,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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 16:26:52,599 INFO L175 Difference]: Start difference. First operand has 168 places, 236 transitions, 2434 flow. Second operand 3 states and 327 transitions. [2023-08-30 16:26:52,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 298 transitions, 3564 flow [2023-08-30 16:26:52,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 298 transitions, 3030 flow, removed 250 selfloop flow, removed 12 redundant places. [2023-08-30 16:26:52,630 INFO L231 Difference]: Finished difference. Result has 160 places, 244 transitions, 2015 flow [2023-08-30 16:26:52,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2015, PETRI_PLACES=160, PETRI_TRANSITIONS=244} [2023-08-30 16:26:52,632 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 136 predicate places. [2023-08-30 16:26:52,632 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 244 transitions, 2015 flow [2023-08-30 16:26:52,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:26:52,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:26:52,633 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:26:52,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:26:52,633 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:26:52,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:26:52,633 INFO L85 PathProgramCache]: Analyzing trace with hash 760072843, now seen corresponding path program 2 times [2023-08-30 16:26:52,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:26:52,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852794575] [2023-08-30 16:26:52,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:52,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:26:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-08-30 16:26:53,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:26:53,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852794575] [2023-08-30 16:26:53,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852794575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:26:53,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950646479] [2023-08-30 16:26:53,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:26:53,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:26:53,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:26:53,206 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 16:26:53,207 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 16:26:53,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:26:53,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:26:53,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-30 16:26:53,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:26:53,708 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-08-30 16:26:53,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2023-08-30 16:26:53,731 INFO L321 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2023-08-30 16:26:53,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 85 [2023-08-30 16:26:53,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 16:26:53,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 35 [2023-08-30 16:26:53,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-30 16:26:53,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 65 [2023-08-30 16:26:53,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 38 [2023-08-30 16:26:53,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 16:26:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:26:53,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:26:53,940 INFO L321 Elim1Store]: treesize reduction 26, result has 65.3 percent of original size [2023-08-30 16:26:53,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 111 [2023-08-30 16:26:53,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:26:53,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 70 [2023-08-30 16:26:53,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-08-30 16:26:54,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:26:54,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 212 [2023-08-30 16:26:54,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:26:54,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 66 [2023-08-30 16:26:54,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:26:54,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2023-08-30 16:26:54,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-08-30 16:26:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:26:54,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950646479] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:26:54,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:26:54,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2023-08-30 16:26:54,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133981248] [2023-08-30 16:26:54,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:26:54,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 16:26:54,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:26:54,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 16:26:54,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2023-08-30 16:26:54,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 218 [2023-08-30 16:26:54,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 244 transitions, 2015 flow. Second operand has 28 states, 28 states have (on average 81.07142857142857) internal successors, (2270), 28 states have internal predecessors, (2270), 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 16:26:54,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:26:54,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 218 [2023-08-30 16:26:54,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:26:56,459 INFO L130 PetriNetUnfolder]: 485/1363 cut-off events. [2023-08-30 16:26:56,460 INFO L131 PetriNetUnfolder]: For 5542/5542 co-relation queries the response was YES. [2023-08-30 16:26:56,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6459 conditions, 1363 events. 485/1363 cut-off events. For 5542/5542 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6275 event pairs, 6 based on Foata normal form. 14/1369 useless extension candidates. Maximal degree in co-relation 6370. Up to 296 conditions per place. [2023-08-30 16:26:56,467 INFO L137 encePairwiseOnDemand]: 203/218 looper letters, 114 selfloop transitions, 76 changer transitions 227/418 dead transitions. [2023-08-30 16:26:56,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 418 transitions, 4268 flow [2023-08-30 16:26:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 16:26:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 16:26:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3651 transitions. [2023-08-30 16:26:56,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37217125382262994 [2023-08-30 16:26:56,472 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3651 transitions. [2023-08-30 16:26:56,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3651 transitions. [2023-08-30 16:26:56,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:26:56,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3651 transitions. [2023-08-30 16:26:56,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 81.13333333333334) internal successors, (3651), 45 states have internal predecessors, (3651), 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 16:26:56,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 218.0) internal successors, (10028), 46 states have internal predecessors, (10028), 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 16:26:56,486 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 218.0) internal successors, (10028), 46 states have internal predecessors, (10028), 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 16:26:56,486 INFO L175 Difference]: Start difference. First operand has 160 places, 244 transitions, 2015 flow. Second operand 45 states and 3651 transitions. [2023-08-30 16:26:56,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 418 transitions, 4268 flow [2023-08-30 16:26:56,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 418 transitions, 4242 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 16:26:56,512 INFO L231 Difference]: Finished difference. Result has 215 places, 139 transitions, 1479 flow [2023-08-30 16:26:56,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1479, PETRI_PLACES=215, PETRI_TRANSITIONS=139} [2023-08-30 16:26:56,513 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 191 predicate places. [2023-08-30 16:26:56,513 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 139 transitions, 1479 flow [2023-08-30 16:26:56,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 81.07142857142857) internal successors, (2270), 28 states have internal predecessors, (2270), 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 16:26:56,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:26:56,514 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:26:56,522 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 16:26:56,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:26:56,722 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:26:56,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:26:56,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1735330572, now seen corresponding path program 1 times [2023-08-30 16:26:56,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:26:56,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17420170] [2023-08-30 16:26:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:56,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:26:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 157 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:26:56,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:26:56,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17420170] [2023-08-30 16:26:56,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17420170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:26:56,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307104364] [2023-08-30 16:26:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:26:56,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:26:56,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:26:56,994 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 16:26:57,028 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 16:26:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:26:57,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 16:26:57,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:26:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 176 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:26:57,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:26:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 176 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:26:57,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307104364] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:26:57,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:26:57,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-30 16:26:57,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126331418] [2023-08-30 16:26:57,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:26:57,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 16:26:57,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:26:57,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 16:26:57,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-08-30 16:26:57,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 218 [2023-08-30 16:26:57,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 139 transitions, 1479 flow. Second operand has 20 states, 20 states have (on average 96.4) internal successors, (1928), 20 states have internal predecessors, (1928), 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 16:26:57,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:26:57,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 218 [2023-08-30 16:26:57,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:26:57,856 INFO L130 PetriNetUnfolder]: 193/609 cut-off events. [2023-08-30 16:26:57,856 INFO L131 PetriNetUnfolder]: For 2289/2289 co-relation queries the response was YES. [2023-08-30 16:26:57,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3139 conditions, 609 events. 193/609 cut-off events. For 2289/2289 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2063 event pairs, 8 based on Foata normal form. 3/612 useless extension candidates. Maximal degree in co-relation 3075. Up to 145 conditions per place. [2023-08-30 16:26:57,859 INFO L137 encePairwiseOnDemand]: 211/218 looper letters, 0 selfloop transitions, 0 changer transitions 152/152 dead transitions. [2023-08-30 16:26:57,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 152 transitions, 1659 flow [2023-08-30 16:26:57,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 16:26:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 16:26:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2157 transitions. [2023-08-30 16:26:57,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43019545273234944 [2023-08-30 16:26:57,862 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2157 transitions. [2023-08-30 16:26:57,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2157 transitions. [2023-08-30 16:26:57,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:26:57,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2157 transitions. [2023-08-30 16:26:57,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 93.78260869565217) internal successors, (2157), 23 states have internal predecessors, (2157), 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 16:26:57,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 218.0) internal successors, (5232), 24 states have internal predecessors, (5232), 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 16:26:57,868 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 218.0) internal successors, (5232), 24 states have internal predecessors, (5232), 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 16:26:57,868 INFO L175 Difference]: Start difference. First operand has 215 places, 139 transitions, 1479 flow. Second operand 23 states and 2157 transitions. [2023-08-30 16:26:57,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 152 transitions, 1659 flow [2023-08-30 16:26:57,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 152 transitions, 1170 flow, removed 110 selfloop flow, removed 67 redundant places. [2023-08-30 16:26:57,882 INFO L231 Difference]: Finished difference. Result has 139 places, 0 transitions, 0 flow [2023-08-30 16:26:57,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=0, PETRI_PLACES=139, PETRI_TRANSITIONS=0} [2023-08-30 16:26:57,882 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 115 predicate places. [2023-08-30 16:26:57,882 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 0 transitions, 0 flow [2023-08-30 16:26:57,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 96.4) internal successors, (1928), 20 states have internal predecessors, (1928), 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 16:26:57,885 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 16:26:57,885 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 16:26:57,892 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 16:26:58,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 16:26:58,090 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 16:26:58,093 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-30 16:26:58,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:26:58,107 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-08-30 16:26:58,107 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:26:58,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-30 16:26:58,108 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:26:58,108 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-08-30 16:26:58,108 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:26:58,108 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-30 16:26:58,108 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-30 16:26:58,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 16:26:58,113 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-08-30 16:26:58,113 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:26:58,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-30 16:26:58,114 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-08-30 16:27:00,882 INFO L134 LiptonReduction]: Checked pairs total: 2420 [2023-08-30 16:27:00,882 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-30 16:27:00,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:27:00,888 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;@29f3386b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:27:00,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:27:00,890 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-30 16:27:00,890 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:27:00,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:27:00,890 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 16:27:00,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:27:00,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:27:00,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1033171735, now seen corresponding path program 1 times [2023-08-30 16:27:00,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:27:00,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293572827] [2023-08-30 16:27:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:27:00,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:27:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:27:00,913 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:27:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:27:00,927 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:27:00,929 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:27:00,929 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:27:00,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 16:27:00,929 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:27:00,930 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:27:00,930 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:27:00,930 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 16:27:00,966 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:27:00,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-08-30 16:27:00,983 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-08-30 16:27:00,983 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:27:00,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-08-30 16:27:00,984 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 193 transitions, 398 flow [2023-08-30 16:27:00,985 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 193 transitions, 398 flow [2023-08-30 16:27:00,985 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:27:00,985 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 193 transitions, 398 flow [2023-08-30 16:27:00,985 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 193 transitions, 398 flow [2023-08-30 16:27:00,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-08-30 16:27:00,997 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-08-30 16:27:00,997 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:27:00,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-08-30 16:27:01,003 INFO L119 LiptonReduction]: Number of co-enabled transitions 16380 [2023-08-30 16:27:04,440 INFO L134 LiptonReduction]: Checked pairs total: 30194 [2023-08-30 16:27:04,440 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-30 16:27:04,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:27:04,441 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;@29f3386b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:27:04,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 16:27:04,444 INFO L130 PetriNetUnfolder]: 7/49 cut-off events. [2023-08-30 16:27:04,444 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:27:04,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:27:04,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:27:04,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:27:04,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:27:04,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1222593382, now seen corresponding path program 1 times [2023-08-30 16:27:04,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:27:04,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086051504] [2023-08-30 16:27:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:27:04,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:27:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:27:04,474 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 16:27:04,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:27:04,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086051504] [2023-08-30 16:27:04,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086051504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:27:04,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:27:04,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:27:04,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322230653] [2023-08-30 16:27:04,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:27:04,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:27:04,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:27:04,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:27:04,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:27:04,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 348 [2023-08-30 16:27:04,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 66 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 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 16:27:04,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:27:04,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 348 [2023-08-30 16:27:04,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:27:04,696 INFO L130 PetriNetUnfolder]: 1355/2321 cut-off events. [2023-08-30 16:27:04,696 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-30 16:27:04,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4461 conditions, 2321 events. 1355/2321 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13208 event pairs, 425 based on Foata normal form. 0/1906 useless extension candidates. Maximal degree in co-relation 4036. Up to 1589 conditions per place. [2023-08-30 16:27:04,705 INFO L137 encePairwiseOnDemand]: 333/348 looper letters, 89 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2023-08-30 16:27:04,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 111 transitions, 438 flow [2023-08-30 16:27:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:27:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:27:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 895 transitions. [2023-08-30 16:27:04,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514367816091954 [2023-08-30 16:27:04,706 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 895 transitions. [2023-08-30 16:27:04,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 895 transitions. [2023-08-30 16:27:04,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:27:04,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 895 transitions. [2023-08-30 16:27:04,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 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 16:27:04,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 348.0) internal successors, (2088), 6 states have internal predecessors, (2088), 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 16:27:04,709 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 348.0) internal successors, (2088), 6 states have internal predecessors, (2088), 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 16:27:04,709 INFO L175 Difference]: Start difference. First operand has 57 places, 66 transitions, 144 flow. Second operand 5 states and 895 transitions. [2023-08-30 16:27:04,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 111 transitions, 438 flow [2023-08-30 16:27:04,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 111 transitions, 436 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 16:27:04,711 INFO L231 Difference]: Finished difference. Result has 64 places, 68 transitions, 202 flow [2023-08-30 16:27:04,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=64, PETRI_TRANSITIONS=68} [2023-08-30 16:27:04,712 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2023-08-30 16:27:04,712 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 68 transitions, 202 flow [2023-08-30 16:27:04,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 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 16:27:04,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:27:04,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:27:04,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 16:27:04,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:27:04,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:27:04,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1262345611, now seen corresponding path program 1 times [2023-08-30 16:27:04,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:27:04,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38661501] [2023-08-30 16:27:04,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:27:04,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:27:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:27:04,739 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 16:27:04,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:27:04,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38661501] [2023-08-30 16:27:04,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38661501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:27:04,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:27:04,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:27:04,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617667697] [2023-08-30 16:27:04,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:27:04,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:27:04,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:27:04,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:27:04,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:27:04,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 348 [2023-08-30 16:27:04,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 68 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 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 16:27:04,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:27:04,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 348 [2023-08-30 16:27:04,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:27:04,943 INFO L130 PetriNetUnfolder]: 1677/2865 cut-off events. [2023-08-30 16:27:04,943 INFO L131 PetriNetUnfolder]: For 835/845 co-relation queries the response was YES. [2023-08-30 16:27:04,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6209 conditions, 2865 events. 1677/2865 cut-off events. For 835/845 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17254 event pairs, 381 based on Foata normal form. 54/2605 useless extension candidates. Maximal degree in co-relation 3813. Up to 2215 conditions per place. [2023-08-30 16:27:04,955 INFO L137 encePairwiseOnDemand]: 343/348 looper letters, 70 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-08-30 16:27:04,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 425 flow [2023-08-30 16:27:04,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:27:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:27:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2023-08-30 16:27:04,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268199233716475 [2023-08-30 16:27:04,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2023-08-30 16:27:04,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2023-08-30 16:27:04,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:27:04,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2023-08-30 16:27:04,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 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 16:27:04,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 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 16:27:04,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 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 16:27:04,959 INFO L175 Difference]: Start difference. First operand has 64 places, 68 transitions, 202 flow. Second operand 3 states and 550 transitions. [2023-08-30 16:27:04,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 425 flow [2023-08-30 16:27:04,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 90 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:27:04,960 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 223 flow [2023-08-30 16:27:04,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2023-08-30 16:27:04,961 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-08-30 16:27:04,961 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 223 flow [2023-08-30 16:27:04,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 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 16:27:04,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:27:04,961 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 16:27:04,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 16:27:04,962 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:27:04,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:27:04,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2082166543, now seen corresponding path program 1 times [2023-08-30 16:27:04,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:27:04,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197284960] [2023-08-30 16:27:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:27:04,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:27:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:27:04,999 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 16:27:04,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:27:04,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197284960] [2023-08-30 16:27:04,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197284960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:27:04,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:27:04,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:27:05,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862578477] [2023-08-30 16:27:05,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:27:05,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:27:05,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:27:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:27:05,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:27:05,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 348 [2023-08-30 16:27:05,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 155.8) internal successors, (779), 5 states have internal predecessors, (779), 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 16:27:05,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:27:05,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 348 [2023-08-30 16:27:05,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:27:05,418 INFO L130 PetriNetUnfolder]: 2589/4305 cut-off events. [2023-08-30 16:27:05,418 INFO L131 PetriNetUnfolder]: For 1204/1220 co-relation queries the response was YES. [2023-08-30 16:27:05,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9601 conditions, 4305 events. 2589/4305 cut-off events. For 1204/1220 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26862 event pairs, 677 based on Foata normal form. 10/3813 useless extension candidates. Maximal degree in co-relation 6997. Up to 2343 conditions per place. [2023-08-30 16:27:05,441 INFO L137 encePairwiseOnDemand]: 340/348 looper letters, 139 selfloop transitions, 8 changer transitions 0/163 dead transitions. [2023-08-30 16:27:05,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 163 transitions, 788 flow [2023-08-30 16:27:05,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:27:05,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:27:05,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1061 transitions. [2023-08-30 16:27:05,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081417624521073 [2023-08-30 16:27:05,443 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1061 transitions. [2023-08-30 16:27:05,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1061 transitions. [2023-08-30 16:27:05,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:27:05,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1061 transitions. [2023-08-30 16:27:05,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.83333333333334) internal successors, (1061), 6 states have internal predecessors, (1061), 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 16:27:05,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 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 16:27:05,446 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 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 16:27:05,446 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 223 flow. Second operand 6 states and 1061 transitions. [2023-08-30 16:27:05,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 163 transitions, 788 flow [2023-08-30 16:27:05,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 163 transitions, 784 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:27:05,448 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 268 flow [2023-08-30 16:27:05,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-08-30 16:27:05,449 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2023-08-30 16:27:05,450 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 268 flow [2023-08-30 16:27:05,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.8) internal successors, (779), 5 states have internal predecessors, (779), 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 16:27:05,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:27:05,450 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 16:27:05,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 16:27:05,450 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:27:05,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:27:05,451 INFO L85 PathProgramCache]: Analyzing trace with hash -904241901, now seen corresponding path program 1 times [2023-08-30 16:27:05,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:27:05,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904191771] [2023-08-30 16:27:05,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:27:05,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:27:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:27:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:27:05,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:27:05,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904191771] [2023-08-30 16:27:05,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904191771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:27:05,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:27:05,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:27:05,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774889520] [2023-08-30 16:27:05,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:27:05,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:27:05,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:27:05,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:27:05,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:27:05,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 348 [2023-08-30 16:27:05,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 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 16:27:05,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:27:05,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 348 [2023-08-30 16:27:05,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:27:06,055 INFO L130 PetriNetUnfolder]: 3961/6479 cut-off events. [2023-08-30 16:27:06,055 INFO L131 PetriNetUnfolder]: For 2146/2160 co-relation queries the response was YES. [2023-08-30 16:27:06,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15099 conditions, 6479 events. 3961/6479 cut-off events. For 2146/2160 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 41946 event pairs, 1075 based on Foata normal form. 10/5735 useless extension candidates. Maximal degree in co-relation 11279. Up to 3738 conditions per place. [2023-08-30 16:27:06,081 INFO L137 encePairwiseOnDemand]: 340/348 looper letters, 151 selfloop transitions, 9 changer transitions 0/177 dead transitions. [2023-08-30 16:27:06,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 177 transitions, 942 flow [2023-08-30 16:27:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:27:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:27:06,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1058 transitions. [2023-08-30 16:27:06,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067049808429118 [2023-08-30 16:27:06,083 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1058 transitions. [2023-08-30 16:27:06,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1058 transitions. [2023-08-30 16:27:06,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:27:06,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1058 transitions. [2023-08-30 16:27:06,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.33333333333334) internal successors, (1058), 6 states have internal predecessors, (1058), 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 16:27:06,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 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 16:27:06,086 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 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 16:27:06,086 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 268 flow. Second operand 6 states and 1058 transitions. [2023-08-30 16:27:06,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 177 transitions, 942 flow [2023-08-30 16:27:06,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 177 transitions, 932 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:27:06,090 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 314 flow [2023-08-30 16:27:06,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2023-08-30 16:27:06,090 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2023-08-30 16:27:06,091 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 314 flow [2023-08-30 16:27:06,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 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 16:27:06,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:27:06,091 INFO L208 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] [2023-08-30 16:27:06,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 16:27:06,091 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:27:06,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:27:06,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1333451796, now seen corresponding path program 1 times [2023-08-30 16:27:06,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:27:06,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410584867] [2023-08-30 16:27:06,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:27:06,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:27:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:27:06,320 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 16:27:06,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:27:06,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410584867] [2023-08-30 16:27:06,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410584867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:27:06,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:27:06,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 16:27:06,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851544005] [2023-08-30 16:27:06,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:27:06,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 16:27:06,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:27:06,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 16:27:06,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-08-30 16:27:06,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 348 [2023-08-30 16:27:06,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 314 flow. Second operand has 11 states, 11 states have (on average 136.72727272727272) internal successors, (1504), 11 states have internal predecessors, (1504), 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 16:27:06,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:27:06,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 348 [2023-08-30 16:27:06,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:27:08,413 INFO L130 PetriNetUnfolder]: 7854/12762 cut-off events. [2023-08-30 16:27:08,414 INFO L131 PetriNetUnfolder]: For 3633/3645 co-relation queries the response was YES. [2023-08-30 16:27:08,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30197 conditions, 12762 events. 7854/12762 cut-off events. For 3633/3645 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 87816 event pairs, 1076 based on Foata normal form. 12/11463 useless extension candidates. Maximal degree in co-relation 25422. Up to 5352 conditions per place. [2023-08-30 16:27:08,461 INFO L137 encePairwiseOnDemand]: 325/348 looper letters, 397 selfloop transitions, 102 changer transitions 0/515 dead transitions. [2023-08-30 16:27:08,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 515 transitions, 2709 flow [2023-08-30 16:27:08,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 16:27:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 16:27:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3019 transitions. [2023-08-30 16:27:08,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45659407138535996 [2023-08-30 16:27:08,465 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3019 transitions. [2023-08-30 16:27:08,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3019 transitions. [2023-08-30 16:27:08,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:27:08,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3019 transitions. [2023-08-30 16:27:08,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 158.89473684210526) internal successors, (3019), 19 states have internal predecessors, (3019), 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 16:27:08,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 348.0) internal successors, (6960), 20 states have internal predecessors, (6960), 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 16:27:08,473 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 348.0) internal successors, (6960), 20 states have internal predecessors, (6960), 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 16:27:08,473 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 314 flow. Second operand 19 states and 3019 transitions. [2023-08-30 16:27:08,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 515 transitions, 2709 flow [2023-08-30 16:27:08,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 515 transitions, 2692 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:27:08,482 INFO L231 Difference]: Finished difference. Result has 110 places, 196 transitions, 1098 flow [2023-08-30 16:27:08,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1098, PETRI_PLACES=110, PETRI_TRANSITIONS=196} [2023-08-30 16:27:08,483 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2023-08-30 16:27:08,483 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 196 transitions, 1098 flow [2023-08-30 16:27:08,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 136.72727272727272) internal successors, (1504), 11 states have internal predecessors, (1504), 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 16:27:08,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:27:08,484 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, 1, 1, 1, 1] [2023-08-30 16:27:08,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 16:27:08,484 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:27:08,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:27:08,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1145727331, now seen corresponding path program 1 times [2023-08-30 16:27:08,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:27:08,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479461779] [2023-08-30 16:27:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:27:08,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:27:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:27:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:27:08,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:27:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479461779] [2023-08-30 16:27:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479461779] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:27:08,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798448545] [2023-08-30 16:27:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:27:08,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:27:08,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:27:08,773 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:27:08,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 16:27:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:27:08,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-30 16:27:08,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:27:08,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 16:27:09,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:27:09,011 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 14 treesize of output 16 [2023-08-30 16:27:09,111 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 16:27:09,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 32 [2023-08-30 16:27:09,211 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 16:27:09,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 36 [2023-08-30 16:27:09,278 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:27:09,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2023-08-30 16:27:09,372 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 16:27:09,374 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 14 treesize of output 16 [2023-08-30 16:27:09,378 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 15 treesize of output 17 [2023-08-30 16:27:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:27:09,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:27:09,425 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-08-30 16:27:09,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 66 [2023-08-30 16:27:09,440 INFO L321 Elim1Store]: treesize reduction 22, result has 45.0 percent of original size [2023-08-30 16:27:09,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 66 [2023-08-30 16:27:09,476 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 196 treesize of output 190 [2023-08-30 16:27:09,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-08-30 16:27:09,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:27:09,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 44 [2023-08-30 16:27:09,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2023-08-30 16:27:09,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 22 [2023-08-30 16:27:09,624 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1001 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#m~0.base| v_ArrVal_1001) |c_~#top~0.base|) |c_~#top~0.offset|) 0)) (not (= |c_thr1Thread1of2ForFork0_push_~#casret~0#1.base| |c_~#top~0.base|)) (not (= |c_thr1Thread1of2ForFork0_index_malloc_~curr_alloc_idx~0#1| 0))) is different from false [2023-08-30 16:27:09,819 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int)) (or (forall ((v_ArrVal_999 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_999))) (or (forall ((v_ArrVal_1001 (Array Int Int))) (= (select (select (store .cse0 |c_~#m~0.base| v_ArrVal_1001) |c_~#top~0.base|) |c_~#top~0.offset|) 0)) (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select .cse0 |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0)))))) (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|))) (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int)) (or (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|) (forall ((v_ArrVal_999 (Array Int Int))) (not (= 0 (+ (select (select (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_999) |c_~#top~0.base|) 0) 1)))))) (or (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int) (v_ArrVal_999 (Array Int Int)) (|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (or (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|) (not (= (+ (select (select (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_999) |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0)))) (not (= c_~next_alloc_idx~0 0)))) is different from false [2023-08-30 16:27:09,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:27:09,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2023-08-30 16:27:09,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:27:09,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 40 [2023-08-30 16:27:09,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 22 [2023-08-30 16:27:09,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:27:09,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2023-08-30 16:27:09,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:27:09,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2023-08-30 16:27:09,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 22 [2023-08-30 16:27:09,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:27:09,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 35 [2023-08-30 16:27:09,939 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:27:09,943 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 16:27:09,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 49 [2023-08-30 16:27:09,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 22 [2023-08-30 16:27:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:27:09,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798448545] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:27:09,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:27:09,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 32 [2023-08-30 16:27:09,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653229559] [2023-08-30 16:27:09,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:27:09,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 16:27:09,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:27:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 16:27:09,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=897, Unknown=13, NotChecked=122, Total=1122 [2023-08-30 16:27:10,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 348 [2023-08-30 16:27:10,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 196 transitions, 1098 flow. Second operand has 34 states, 34 states have (on average 112.79411764705883) internal successors, (3835), 34 states have internal predecessors, (3835), 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 16:27:10,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:27:10,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 348 [2023-08-30 16:27:10,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:27:12,491 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (not (= c_~next_alloc_idx~0 0))) (.cse1 (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select |c_#memory_int| |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0))))) (and (not (= |c_~#m~0.base| |c_~#top~0.base|)) (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int)) (or (forall ((v_ArrVal_999 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_999))) (or (forall ((v_ArrVal_1001 (Array Int Int))) (= (select (select (store .cse0 |c_~#m~0.base| v_ArrVal_1001) |c_~#top~0.base|) |c_~#top~0.offset|) 0)) (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select .cse0 |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0)))))) (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|))) (= |c_~#top~0.offset| 0) (or (forall ((v_ArrVal_1001 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#m~0.base| v_ArrVal_1001) |c_~#top~0.base|) |c_~#top~0.offset|) 0)) .cse1) (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int)) (or (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|) (forall ((v_ArrVal_999 (Array Int Int))) (not (= 0 (+ (select (select (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_999) |c_~#top~0.base|) 0) 1)))))) (or (forall ((|v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| Int) (v_ArrVal_999 (Array Int Int)) (|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (or (< |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| |c_~#m2~0.base|) (not (= (+ (select (select (store |c_#memory_int| |v_thr1Thread1of2ForFork0___VERIFIER_atomic_release_~m#1.base_24| v_ArrVal_999) |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0)))) .cse2) .cse2 (not (= (+ (select (select |c_#memory_int| |c_~#top~0.base|) 0) 1) 0)) (or .cse2 .cse1) (< |c_~#top~0.base| |c_~#m2~0.base|))) is different from false [2023-08-30 16:27:25,794 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (not (= c_~next_alloc_idx~0 0))) (.cse1 (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select |c_#memory_int| |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) 0) 1) 0)))) (.cse4 (select |c_#memory_int| |c_~#top~0.base|)) (.cse0 (forall ((v_ArrVal_1001 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#m~0.base| v_ArrVal_1001) |c_~#top~0.base|) |c_~#top~0.offset|) 0))) (.cse3 (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select |c_#memory_int| |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) |c_thr1Thread1of2ForFork0_push_~#casret~0#1.offset|) 1) 0))))) (and .cse0 (or .cse0 .cse1) (or .cse2 .cse3) .cse2 (not (= (+ (select .cse4 0) 1) 0)) (or .cse2 .cse1) (not (= (+ (select .cse4 |c_thr1Thread1of2ForFork0_push_~#casret~0#1.offset|) 1) 0)) (not (= |c_thr1Thread1of2ForFork0_push_~#casret~0#1.base| |c_~#top~0.base|)) (or .cse0 .cse3))) is different from false [2023-08-30 16:27:39,561 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (not (= c_~next_alloc_idx~0 0))) (.cse0 (forall ((v_ArrVal_1001 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#m~0.base| v_ArrVal_1001) |c_~#top~0.base|) |c_~#top~0.offset|) 0))) (.cse2 (forall ((|thr1Thread1of2ForFork0_push_~#casret~0#1.base| Int)) (not (= (+ (select (select |c_#memory_int| |thr1Thread1of2ForFork0_push_~#casret~0#1.base|) |c_thr1Thread1of2ForFork0_push_~#casret~0#1.offset|) 1) 0))))) (and .cse0 (or .cse1 .cse2) .cse1 (not (= (+ (select (select |c_#memory_int| |c_~#top~0.base|) |c_thr1Thread1of2ForFork0_push_~#casret~0#1.offset|) 1) 0)) (not (= |c_thr1Thread1of2ForFork0_push_~#casret~0#1.base| |c_~#top~0.base|)) (or .cse0 .cse2))) is different from false [2023-08-30 16:27:50,678 INFO L130 PetriNetUnfolder]: 61799/100951 cut-off events. [2023-08-30 16:27:50,679 INFO L131 PetriNetUnfolder]: For 126819/126865 co-relation queries the response was YES. [2023-08-30 16:27:51,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316028 conditions, 100951 events. 61799/100951 cut-off events. For 126819/126865 co-relation queries the response was YES. Maximal size of possible extension queue 3494. Compared 907701 event pairs, 2029 based on Foata normal form. 1052/95119 useless extension candidates. Maximal degree in co-relation 280853. Up to 16379 conditions per place. [2023-08-30 16:27:51,533 INFO L137 encePairwiseOnDemand]: 300/348 looper letters, 4013 selfloop transitions, 2131 changer transitions 0/6156 dead transitions. [2023-08-30 16:27:51,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 6156 transitions, 41914 flow [2023-08-30 16:27:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2023-08-30 16:27:51,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2023-08-30 16:27:51,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 27925 transitions. [2023-08-30 16:27:51,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3803045159884513 [2023-08-30 16:27:51,554 INFO L72 ComplementDD]: Start complementDD. Operand 211 states and 27925 transitions. [2023-08-30 16:27:51,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 211 states and 27925 transitions. [2023-08-30 16:27:51,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:27:51,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 211 states and 27925 transitions. [2023-08-30 16:27:51,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 212 states, 211 states have (on average 132.34597156398104) internal successors, (27925), 211 states have internal predecessors, (27925), 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 16:27:51,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 212 states, 212 states have (on average 348.0) internal successors, (73776), 212 states have internal predecessors, (73776), 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 16:27:51,643 INFO L81 ComplementDD]: Finished complementDD. Result has 212 states, 212 states have (on average 348.0) internal successors, (73776), 212 states have internal predecessors, (73776), 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 16:27:51,644 INFO L175 Difference]: Start difference. First operand has 110 places, 196 transitions, 1098 flow. Second operand 211 states and 27925 transitions. [2023-08-30 16:27:51,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 6156 transitions, 41914 flow [2023-08-30 16:27:52,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 6156 transitions, 41858 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 16:27:52,253 INFO L231 Difference]: Finished difference. Result has 508 places, 2556 transitions, 24338 flow [2023-08-30 16:27:52,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=211, PETRI_FLOW=24338, PETRI_PLACES=508, PETRI_TRANSITIONS=2556} [2023-08-30 16:27:52,254 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 451 predicate places. [2023-08-30 16:27:52,254 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 2556 transitions, 24338 flow [2023-08-30 16:27:52,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 112.79411764705883) internal successors, (3835), 34 states have internal predecessors, (3835), 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 16:27:52,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:27:52,255 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, 1, 1, 1, 1] [2023-08-30 16:27:52,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 16:27:52,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 16:27:52,460 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:27:52,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:27:52,460 INFO L85 PathProgramCache]: Analyzing trace with hash -412835617, now seen corresponding path program 2 times [2023-08-30 16:27:52,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:27:52,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911272266] [2023-08-30 16:27:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:27:52,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:27:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:27:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:27:52,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:27:52,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911272266] [2023-08-30 16:27:52,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911272266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:27:52,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517154385] [2023-08-30 16:27:52,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:27:52,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:27:52,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:27:52,940 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:27:52,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 16:27:53,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:27:53,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:27:53,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-30 16:27:53,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:27:53,086 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:27:53,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:27:53,345 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 16:27:53,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-08-30 16:27:53,397 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 14 treesize of output 16 [2023-08-30 16:27:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:27:53,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:27:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:27:53,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517154385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:27:53,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:27:53,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2023-08-30 16:27:53,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710288031] [2023-08-30 16:27:53,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:27:53,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 16:27:53,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:27:53,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 16:27:53,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=564, Unknown=2, NotChecked=0, Total=650 [2023-08-30 16:27:54,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 348 [2023-08-30 16:27:54,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 2556 transitions, 24338 flow. Second operand has 26 states, 26 states have (on average 127.15384615384616) internal successors, (3306), 26 states have internal predecessors, (3306), 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 16:27:54,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:27:54,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 348 [2023-08-30 16:27:54,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:29:33,704 INFO L130 PetriNetUnfolder]: 111540/185689 cut-off events. [2023-08-30 16:29:33,704 INFO L131 PetriNetUnfolder]: For 20058844/20103791 co-relation queries the response was YES. [2023-08-30 16:29:42,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1855266 conditions, 185689 events. 111540/185689 cut-off events. For 20058844/20103791 co-relation queries the response was YES. Maximal size of possible extension queue 5756. Compared 1844152 event pairs, 5673 based on Foata normal form. 1598/172978 useless extension candidates. Maximal degree in co-relation 1829519. Up to 57012 conditions per place. [2023-08-30 16:29:44,777 INFO L137 encePairwiseOnDemand]: 323/348 looper letters, 3612 selfloop transitions, 4188 changer transitions 0/7839 dead transitions. [2023-08-30 16:29:44,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 7839 transitions, 124571 flow [2023-08-30 16:29:44,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-08-30 16:29:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-08-30 16:29:44,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 12687 transitions. [2023-08-30 16:29:44,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42890466531440163 [2023-08-30 16:29:44,867 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 12687 transitions. [2023-08-30 16:29:44,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 12687 transitions. [2023-08-30 16:29:44,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:29:44,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 12687 transitions. [2023-08-30 16:29:44,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 149.25882352941176) internal successors, (12687), 85 states have internal predecessors, (12687), 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 16:29:44,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 348.0) internal successors, (29928), 86 states have internal predecessors, (29928), 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 16:29:44,901 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 348.0) internal successors, (29928), 86 states have internal predecessors, (29928), 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 16:29:44,901 INFO L175 Difference]: Start difference. First operand has 508 places, 2556 transitions, 24338 flow. Second operand 85 states and 12687 transitions. [2023-08-30 16:29:44,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 7839 transitions, 124571 flow