./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.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/35_double_lock_p3_vs.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 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd --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 16:34:37,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:34:37,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:34:37,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:34:37,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:34:37,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:34:37,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:34:37,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:34:37,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:34:37,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:34:37,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:34:37,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:34:37,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:34:37,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:34:37,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:34:37,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:34:37,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:34:37,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:34:37,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:34:37,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:34:37,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:34:37,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:34:37,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:34:37,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:34:37,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:34:37,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:34:37,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:34:37,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:34:37,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:34:37,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:34:37,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:34:37,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:34:37,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:34:37,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:34:37,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:34:37,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:34:37,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:34:37,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:34:37,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:34:37,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:34:37,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:34:37,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:34:37,401 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:34:37,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:34:37,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:34:37,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:34:37,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:34:37,402 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:34:37,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:34:37,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:34:37,403 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:34:37,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:34:37,404 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:34:37,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:34:37,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:34:37,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:34:37,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:34:37,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:34:37,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:34:37,405 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:34:37,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:34:37,406 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:34:37,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:34:37,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:34:37,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:34:37,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:34:37,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:34:37,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:34:37,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:34:37,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:34:37,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:34:37,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:34:37,408 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:34:37,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:34:37,408 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:34:37,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:34:37,408 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:34:37,409 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:34:37,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:34:37,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:34:37,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:34:37,738 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:34:37,738 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:34:37,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-08-30 16:34:38,915 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:34:39,193 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:34:39,197 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-08-30 16:34:39,215 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d29ba782b/f2fccce1f38b420bbb9dbbfad4f7e65c/FLAG43d22ae67 [2023-08-30 16:34:39,238 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d29ba782b/f2fccce1f38b420bbb9dbbfad4f7e65c [2023-08-30 16:34:39,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:34:39,242 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:34:39,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:34:39,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:34:39,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:34:39,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:34:39" (1/1) ... [2023-08-30 16:34:39,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d663375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:39, skipping insertion in model container [2023-08-30 16:34:39,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:34:39" (1/1) ... [2023-08-30 16:34:39,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:34:39,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:34:39,631 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/35_double_lock_p3_vs.i[30553,30566] [2023-08-30 16:34:39,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:34:39,652 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:34:39,695 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/35_double_lock_p3_vs.i[30553,30566] [2023-08-30 16:34:39,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:34:39,792 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:34:39,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:39 WrapperNode [2023-08-30 16:34:39,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:34:39,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:34:39,794 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:34:39,794 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:34:39,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:39" (1/1) ... [2023-08-30 16:34:39,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:39" (1/1) ... [2023-08-30 16:34:39,862 INFO L138 Inliner]: procedures = 172, calls = 27, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 126 [2023-08-30 16:34:39,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:34:39,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:34:39,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:34:39,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:34:39,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:39" (1/1) ... [2023-08-30 16:34:39,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:39" (1/1) ... [2023-08-30 16:34:39,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:39" (1/1) ... [2023-08-30 16:34:39,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:39" (1/1) ... [2023-08-30 16:34:39,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:39" (1/1) ... [2023-08-30 16:34:39,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:39" (1/1) ... [2023-08-30 16:34:39,910 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:39" (1/1) ... [2023-08-30 16:34:39,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:39" (1/1) ... [2023-08-30 16:34:39,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:34:39,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:34:39,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:34:39,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:34:39,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:39" (1/1) ... [2023-08-30 16:34:39,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:34:39,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:34:39,969 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 16:34:39,977 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 16:34:40,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 16:34:40,013 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-30 16:34:40,013 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-30 16:34:40,013 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 16:34:40,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 16:34:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:34:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:34:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:34:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:34:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:34:40,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:34:40,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:34:40,017 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 16:34:40,162 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:34:40,163 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:34:40,483 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:34:40,598 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:34:40,598 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 16:34:40,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:34:40 BoogieIcfgContainer [2023-08-30 16:34:40,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:34:40,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:34:40,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:34:40,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:34:40,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:34:39" (1/3) ... [2023-08-30 16:34:40,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ebe4651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:34:40, skipping insertion in model container [2023-08-30 16:34:40,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:34:39" (2/3) ... [2023-08-30 16:34:40,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ebe4651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:34:40, skipping insertion in model container [2023-08-30 16:34:40,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:34:40" (3/3) ... [2023-08-30 16:34:40,608 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2023-08-30 16:34:40,615 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:34:40,623 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:34:40,624 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 16:34:40,624 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:34:40,685 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:34:40,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-08-30 16:34:40,803 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-08-30 16:34:40,803 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:34:40,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-30 16:34:40,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-08-30 16:34:40,815 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 158 flow [2023-08-30 16:34:40,818 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:34:40,830 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 75 transitions, 158 flow [2023-08-30 16:34:40,834 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 75 transitions, 158 flow [2023-08-30 16:34:40,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 158 flow [2023-08-30 16:34:40,865 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-08-30 16:34:40,865 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:34:40,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-30 16:34:40,870 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2023-08-30 16:34:42,746 INFO L134 LiptonReduction]: Checked pairs total: 3426 [2023-08-30 16:34:42,747 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-08-30 16:34:42,759 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:34:42,769 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;@2ceca4c0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:34:42,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:34:42,776 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 16:34:42,777 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:34:42,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:42,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:34:42,779 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:34:42,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:42,785 INFO L85 PathProgramCache]: Analyzing trace with hash 460053008, now seen corresponding path program 1 times [2023-08-30 16:34:42,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:42,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538731737] [2023-08-30 16:34:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:42,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:42,981 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 16:34:42,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:42,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538731737] [2023-08-30 16:34:42,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538731737] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:42,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:42,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:34:42,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920794390] [2023-08-30 16:34:42,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:42,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:34:42,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:43,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:34:43,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:34:43,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 135 [2023-08-30 16:34:43,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 16:34:43,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:43,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 135 [2023-08-30 16:34:43,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:34:43,116 INFO L130 PetriNetUnfolder]: 182/313 cut-off events. [2023-08-30 16:34:43,120 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:34:43,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 313 events. 182/313 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1159 event pairs, 51 based on Foata normal form. 12/315 useless extension candidates. Maximal degree in co-relation 626. Up to 222 conditions per place. [2023-08-30 16:34:43,126 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 19 selfloop transitions, 2 changer transitions 1/25 dead transitions. [2023-08-30 16:34:43,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 25 transitions, 102 flow [2023-08-30 16:34:43,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:34:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:34:43,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2023-08-30 16:34:43,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48641975308641977 [2023-08-30 16:34:43,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2023-08-30 16:34:43,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2023-08-30 16:34:43,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:34:43,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2023-08-30 16:34:43,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 16:34:43,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 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 16:34:43,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 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 16:34:43,159 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 56 flow. Second operand 3 states and 197 transitions. [2023-08-30 16:34:43,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 25 transitions, 102 flow [2023-08-30 16:34:43,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:34:43,163 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 55 flow [2023-08-30 16:34:43,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-30 16:34:43,173 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-08-30 16:34:43,174 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 55 flow [2023-08-30 16:34:43,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 16:34:43,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:43,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:34:43,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:34:43,176 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:34:43,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1682741378, now seen corresponding path program 1 times [2023-08-30 16:34:43,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:43,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476766059] [2023-08-30 16:34:43,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:43,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:43,392 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 16:34:43,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:43,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476766059] [2023-08-30 16:34:43,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476766059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:43,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:43,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:34:43,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874991998] [2023-08-30 16:34:43,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:43,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:34:43,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:43,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:34:43,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:34:43,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 135 [2023-08-30 16:34:43,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 55 flow. Second operand has 5 states, 5 states have (on average 54.8) internal successors, (274), 5 states have internal predecessors, (274), 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 16:34:43,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:43,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 135 [2023-08-30 16:34:43,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:34:43,552 INFO L130 PetriNetUnfolder]: 162/275 cut-off events. [2023-08-30 16:34:43,552 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 16:34:43,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 275 events. 162/275 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 947 event pairs, 24 based on Foata normal form. 3/277 useless extension candidates. Maximal degree in co-relation 586. Up to 190 conditions per place. [2023-08-30 16:34:43,557 INFO L137 encePairwiseOnDemand]: 130/135 looper letters, 25 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2023-08-30 16:34:43,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 137 flow [2023-08-30 16:34:43,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:34:43,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:34:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 295 transitions. [2023-08-30 16:34:43,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2023-08-30 16:34:43,561 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 295 transitions. [2023-08-30 16:34:43,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 295 transitions. [2023-08-30 16:34:43,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:34:43,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 295 transitions. [2023-08-30 16:34:43,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 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 16:34:43,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 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 16:34:43,565 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 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 16:34:43,565 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 55 flow. Second operand 5 states and 295 transitions. [2023-08-30 16:34:43,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 137 flow [2023-08-30 16:34:43,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 133 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:34:43,567 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 63 flow [2023-08-30 16:34:43,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=63, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-30 16:34:43,568 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2023-08-30 16:34:43,568 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 63 flow [2023-08-30 16:34:43,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.8) internal successors, (274), 5 states have internal predecessors, (274), 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 16:34:43,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:43,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:34:43,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:34:43,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:34:43,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:43,569 INFO L85 PathProgramCache]: Analyzing trace with hash 625375123, now seen corresponding path program 1 times [2023-08-30 16:34:43,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:43,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685421793] [2023-08-30 16:34:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:43,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:43,700 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 16:34:43,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:43,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685421793] [2023-08-30 16:34:43,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685421793] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:43,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:43,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:34:43,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813048588] [2023-08-30 16:34:43,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:43,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:34:43,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:43,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:34:43,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:34:43,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 135 [2023-08-30 16:34:43,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 63 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 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 16:34:43,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:43,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 135 [2023-08-30 16:34:43,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:34:43,825 INFO L130 PetriNetUnfolder]: 147/251 cut-off events. [2023-08-30 16:34:43,826 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-30 16:34:43,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 251 events. 147/251 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 848 event pairs, 15 based on Foata normal form. 9/259 useless extension candidates. Maximal degree in co-relation 565. Up to 94 conditions per place. [2023-08-30 16:34:43,828 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 28 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2023-08-30 16:34:43,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 161 flow [2023-08-30 16:34:43,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:34:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:34:43,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 352 transitions. [2023-08-30 16:34:43,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4345679012345679 [2023-08-30 16:34:43,831 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 352 transitions. [2023-08-30 16:34:43,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 352 transitions. [2023-08-30 16:34:43,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:34:43,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 352 transitions. [2023-08-30 16:34:43,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 58.666666666666664) internal successors, (352), 6 states have internal predecessors, (352), 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 16:34:43,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 135.0) internal successors, (945), 7 states have internal predecessors, (945), 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 16:34:43,838 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 135.0) internal successors, (945), 7 states have internal predecessors, (945), 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 16:34:43,838 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 63 flow. Second operand 6 states and 352 transitions. [2023-08-30 16:34:43,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 161 flow [2023-08-30 16:34:43,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 36 transitions, 153 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 16:34:43,841 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 69 flow [2023-08-30 16:34:43,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=69, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-08-30 16:34:43,843 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-08-30 16:34:43,844 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 69 flow [2023-08-30 16:34:43,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 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 16:34:43,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:43,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:34:43,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:34:43,845 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:34:43,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1017679598, now seen corresponding path program 1 times [2023-08-30 16:34:43,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:43,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108480649] [2023-08-30 16:34:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:43,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:43,983 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 16:34:43,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:43,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108480649] [2023-08-30 16:34:43,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108480649] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:43,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:43,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:34:43,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079049857] [2023-08-30 16:34:43,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:43,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:34:43,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:43,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:34:43,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:34:44,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 135 [2023-08-30 16:34:44,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 20 transitions, 69 flow. Second operand has 7 states, 7 states have (on average 53.857142857142854) internal successors, (377), 7 states have internal predecessors, (377), 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 16:34:44,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:44,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 135 [2023-08-30 16:34:44,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:34:44,114 INFO L130 PetriNetUnfolder]: 208/357 cut-off events. [2023-08-30 16:34:44,115 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2023-08-30 16:34:44,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 357 events. 208/357 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1160 event pairs, 17 based on Foata normal form. 9/366 useless extension candidates. Maximal degree in co-relation 819. Up to 96 conditions per place. [2023-08-30 16:34:44,121 INFO L137 encePairwiseOnDemand]: 127/135 looper letters, 36 selfloop transitions, 6 changer transitions 2/46 dead transitions. [2023-08-30 16:34:44,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 209 flow [2023-08-30 16:34:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:34:44,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:34:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 409 transitions. [2023-08-30 16:34:44,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4328042328042328 [2023-08-30 16:34:44,123 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 409 transitions. [2023-08-30 16:34:44,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 409 transitions. [2023-08-30 16:34:44,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:34:44,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 409 transitions. [2023-08-30 16:34:44,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.42857142857143) internal successors, (409), 7 states have internal predecessors, (409), 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 16:34:44,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 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 16:34:44,129 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 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 16:34:44,129 INFO L175 Difference]: Start difference. First operand has 32 places, 20 transitions, 69 flow. Second operand 7 states and 409 transitions. [2023-08-30 16:34:44,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 209 flow [2023-08-30 16:34:44,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 199 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 16:34:44,133 INFO L231 Difference]: Finished difference. Result has 35 places, 20 transitions, 79 flow [2023-08-30 16:34:44,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=79, PETRI_PLACES=35, PETRI_TRANSITIONS=20} [2023-08-30 16:34:44,135 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 8 predicate places. [2023-08-30 16:34:44,135 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 20 transitions, 79 flow [2023-08-30 16:34:44,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 53.857142857142854) internal successors, (377), 7 states have internal predecessors, (377), 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 16:34:44,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:44,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:34:44,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:34:44,136 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:34:44,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:44,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1483297501, now seen corresponding path program 1 times [2023-08-30 16:34:44,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:44,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183742531] [2023-08-30 16:34:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:44,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:44,248 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 16:34:44,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:44,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183742531] [2023-08-30 16:34:44,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183742531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:44,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:44,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:34:44,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127346601] [2023-08-30 16:34:44,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:44,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:34:44,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:44,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:34:44,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:34:44,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 135 [2023-08-30 16:34:44,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 20 transitions, 79 flow. Second operand has 7 states, 7 states have (on average 53.0) internal successors, (371), 7 states have internal predecessors, (371), 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 16:34:44,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:44,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 135 [2023-08-30 16:34:44,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:34:44,402 INFO L130 PetriNetUnfolder]: 139/240 cut-off events. [2023-08-30 16:34:44,402 INFO L131 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2023-08-30 16:34:44,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 240 events. 139/240 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 796 event pairs, 9 based on Foata normal form. 6/242 useless extension candidates. Maximal degree in co-relation 568. Up to 101 conditions per place. [2023-08-30 16:34:44,403 INFO L137 encePairwiseOnDemand]: 127/135 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2023-08-30 16:34:44,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 181 flow [2023-08-30 16:34:44,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:34:44,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:34:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 446 transitions. [2023-08-30 16:34:44,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.412962962962963 [2023-08-30 16:34:44,405 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 446 transitions. [2023-08-30 16:34:44,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 446 transitions. [2023-08-30 16:34:44,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:34:44,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 446 transitions. [2023-08-30 16:34:44,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 55.75) internal successors, (446), 8 states have internal predecessors, (446), 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 16:34:44,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 135.0) internal successors, (1215), 9 states have internal predecessors, (1215), 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 16:34:44,409 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 135.0) internal successors, (1215), 9 states have internal predecessors, (1215), 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 16:34:44,409 INFO L175 Difference]: Start difference. First operand has 35 places, 20 transitions, 79 flow. Second operand 8 states and 446 transitions. [2023-08-30 16:34:44,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 181 flow [2023-08-30 16:34:44,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 39 transitions, 161 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-30 16:34:44,411 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-08-30 16:34:44,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-08-30 16:34:44,412 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 4 predicate places. [2023-08-30 16:34:44,412 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-08-30 16:34:44,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 53.0) internal successors, (371), 7 states have internal predecessors, (371), 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 16:34:44,415 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 16:34:44,415 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 16:34:44,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 16:34:44,416 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 16:34:44,418 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-30 16:34:44,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-08-30 16:34:44,428 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-08-30 16:34:44,428 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:34:44,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-30 16:34:44,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-08-30 16:34:44,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 158 flow [2023-08-30 16:34:44,430 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:34:44,430 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 75 transitions, 158 flow [2023-08-30 16:34:44,430 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 75 transitions, 158 flow [2023-08-30 16:34:44,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 158 flow [2023-08-30 16:34:44,436 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-08-30 16:34:44,437 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:34:44,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-30 16:34:44,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2023-08-30 16:34:45,978 INFO L134 LiptonReduction]: Checked pairs total: 3564 [2023-08-30 16:34:45,978 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-08-30 16:34:45,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:34:45,981 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;@2ceca4c0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:34:45,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:34:45,984 INFO L130 PetriNetUnfolder]: 2/20 cut-off events. [2023-08-30 16:34:45,984 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:34:45,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:45,984 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 16:34:45,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:34:45,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:45,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1899232887, now seen corresponding path program 1 times [2023-08-30 16:34:45,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:45,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195078584] [2023-08-30 16:34:45,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:45,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:34:45,995 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:34:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:34:46,017 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:34:46,017 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:34:46,017 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-30 16:34:46,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-30 16:34:46,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:34:46,018 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:34:46,019 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-30 16:34:46,019 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:34:46,019 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 16:34:46,049 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:34:46,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 118 transitions, 260 flow [2023-08-30 16:34:46,064 INFO L130 PetriNetUnfolder]: 8/125 cut-off events. [2023-08-30 16:34:46,064 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:34:46,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 125 events. 8/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 233 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 134. Up to 6 conditions per place. [2023-08-30 16:34:46,065 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 118 transitions, 260 flow [2023-08-30 16:34:46,066 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 103 transitions, 221 flow [2023-08-30 16:34:46,066 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:34:46,066 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 103 transitions, 221 flow [2023-08-30 16:34:46,067 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 103 transitions, 221 flow [2023-08-30 16:34:46,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 103 transitions, 221 flow [2023-08-30 16:34:46,078 INFO L130 PetriNetUnfolder]: 8/125 cut-off events. [2023-08-30 16:34:46,078 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:34:46,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 125 events. 8/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 235 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-08-30 16:34:46,082 INFO L119 LiptonReduction]: Number of co-enabled transitions 4762 [2023-08-30 16:34:47,887 INFO L134 LiptonReduction]: Checked pairs total: 12587 [2023-08-30 16:34:47,887 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-08-30 16:34:47,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:34:47,890 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;@2ceca4c0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:34:47,890 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 16:34:47,891 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-08-30 16:34:47,891 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:34:47,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:47,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:34:47,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:34:47,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:47,892 INFO L85 PathProgramCache]: Analyzing trace with hash 737311454, now seen corresponding path program 1 times [2023-08-30 16:34:47,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:47,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964012822] [2023-08-30 16:34:47,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:47,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:47,928 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 16:34:47,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:47,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964012822] [2023-08-30 16:34:47,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964012822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:47,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:47,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:34:47,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073600766] [2023-08-30 16:34:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:47,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:34:47,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:34:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:34:47,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 190 [2023-08-30 16:34:47,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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 16:34:47,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:47,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 190 [2023-08-30 16:34:47,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:34:48,410 INFO L130 PetriNetUnfolder]: 3000/4499 cut-off events. [2023-08-30 16:34:48,410 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-08-30 16:34:48,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8942 conditions, 4499 events. 3000/4499 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 25063 event pairs, 851 based on Foata normal form. 0/4010 useless extension candidates. Maximal degree in co-relation 8931. Up to 3957 conditions per place. [2023-08-30 16:34:48,436 INFO L137 encePairwiseOnDemand]: 184/190 looper letters, 39 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-08-30 16:34:48,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 206 flow [2023-08-30 16:34:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:34:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:34:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-08-30 16:34:48,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2023-08-30 16:34:48,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-08-30 16:34:48,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-08-30 16:34:48,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:34:48,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-08-30 16:34:48,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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 16:34:48,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 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 16:34:48,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 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 16:34:48,441 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 99 flow. Second operand 3 states and 290 transitions. [2023-08-30 16:34:48,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 206 flow [2023-08-30 16:34:48,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 203 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 16:34:48,445 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 111 flow [2023-08-30 16:34:48,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-30 16:34:48,447 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-08-30 16:34:48,447 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 111 flow [2023-08-30 16:34:48,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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 16:34:48,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:48,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:34:48,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:34:48,448 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:34:48,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1086540050, now seen corresponding path program 1 times [2023-08-30 16:34:48,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:48,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312791783] [2023-08-30 16:34:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:48,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:48,511 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 16:34:48,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:48,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312791783] [2023-08-30 16:34:48,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312791783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:48,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:48,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:34:48,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728812877] [2023-08-30 16:34:48,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:48,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:34:48,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:48,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:34:48,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:34:48,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 190 [2023-08-30 16:34:48,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 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 16:34:48,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:48,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 190 [2023-08-30 16:34:48,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:34:49,241 INFO L130 PetriNetUnfolder]: 4083/6060 cut-off events. [2023-08-30 16:34:49,241 INFO L131 PetriNetUnfolder]: For 662/662 co-relation queries the response was YES. [2023-08-30 16:34:49,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12706 conditions, 6060 events. 4083/6060 cut-off events. For 662/662 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 35501 event pairs, 887 based on Foata normal form. 48/5829 useless extension candidates. Maximal degree in co-relation 12693. Up to 4252 conditions per place. [2023-08-30 16:34:49,277 INFO L137 encePairwiseOnDemand]: 180/190 looper letters, 84 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2023-08-30 16:34:49,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 109 transitions, 478 flow [2023-08-30 16:34:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:34:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:34:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2023-08-30 16:34:49,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48796992481203005 [2023-08-30 16:34:49,280 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2023-08-30 16:34:49,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2023-08-30 16:34:49,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:34:49,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2023-08-30 16:34:49,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 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 16:34:49,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 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 16:34:49,285 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 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 16:34:49,285 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 111 flow. Second operand 7 states and 649 transitions. [2023-08-30 16:34:49,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 109 transitions, 478 flow [2023-08-30 16:34:49,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 109 transitions, 474 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:34:49,289 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 227 flow [2023-08-30 16:34:49,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=227, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-08-30 16:34:49,290 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 9 predicate places. [2023-08-30 16:34:49,291 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 227 flow [2023-08-30 16:34:49,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 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 16:34:49,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:49,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:34:49,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:34:49,292 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:34:49,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:49,293 INFO L85 PathProgramCache]: Analyzing trace with hash 487940530, now seen corresponding path program 1 times [2023-08-30 16:34:49,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:49,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406987454] [2023-08-30 16:34:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:49,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:49,373 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 16:34:49,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:49,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406987454] [2023-08-30 16:34:49,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406987454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:49,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:49,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:34:49,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992796839] [2023-08-30 16:34:49,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:49,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:34:49,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:49,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:34:49,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:34:49,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 190 [2023-08-30 16:34:49,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 227 flow. Second operand has 7 states, 7 states have (on average 77.71428571428571) internal successors, (544), 7 states have internal predecessors, (544), 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 16:34:49,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:49,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 190 [2023-08-30 16:34:49,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:34:50,318 INFO L130 PetriNetUnfolder]: 4841/7252 cut-off events. [2023-08-30 16:34:50,318 INFO L131 PetriNetUnfolder]: For 3867/3923 co-relation queries the response was YES. [2023-08-30 16:34:50,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18108 conditions, 7252 events. 4841/7252 cut-off events. For 3867/3923 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 44829 event pairs, 639 based on Foata normal form. 108/7095 useless extension candidates. Maximal degree in co-relation 18090. Up to 3998 conditions per place. [2023-08-30 16:34:50,376 INFO L137 encePairwiseOnDemand]: 179/190 looper letters, 111 selfloop transitions, 23 changer transitions 0/142 dead transitions. [2023-08-30 16:34:50,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 142 transitions, 746 flow [2023-08-30 16:34:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:34:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:34:50,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 819 transitions. [2023-08-30 16:34:50,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789473684210526 [2023-08-30 16:34:50,379 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 819 transitions. [2023-08-30 16:34:50,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 819 transitions. [2023-08-30 16:34:50,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:34:50,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 819 transitions. [2023-08-30 16:34:50,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 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 16:34:50,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 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 16:34:50,387 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 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 16:34:50,387 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 227 flow. Second operand 9 states and 819 transitions. [2023-08-30 16:34:50,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 142 transitions, 746 flow [2023-08-30 16:34:50,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 142 transitions, 738 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 16:34:50,401 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 321 flow [2023-08-30 16:34:50,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=321, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-08-30 16:34:50,403 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2023-08-30 16:34:50,404 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 321 flow [2023-08-30 16:34:50,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.71428571428571) internal successors, (544), 7 states have internal predecessors, (544), 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 16:34:50,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:50,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:34:50,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 16:34:50,405 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:34:50,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:50,405 INFO L85 PathProgramCache]: Analyzing trace with hash 567300941, now seen corresponding path program 1 times [2023-08-30 16:34:50,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:50,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293034227] [2023-08-30 16:34:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:50,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:50,471 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 16:34:50,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:50,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293034227] [2023-08-30 16:34:50,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293034227] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:50,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:50,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:34:50,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320414748] [2023-08-30 16:34:50,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:50,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:34:50,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:50,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:34:50,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:34:50,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 190 [2023-08-30 16:34:50,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 321 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 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 16:34:50,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:50,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 190 [2023-08-30 16:34:50,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:34:51,398 INFO L130 PetriNetUnfolder]: 5485/8170 cut-off events. [2023-08-30 16:34:51,398 INFO L131 PetriNetUnfolder]: For 7617/7749 co-relation queries the response was YES. [2023-08-30 16:34:51,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22499 conditions, 8170 events. 5485/8170 cut-off events. For 7617/7749 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 51360 event pairs, 1059 based on Foata normal form. 48/7945 useless extension candidates. Maximal degree in co-relation 22478. Up to 6339 conditions per place. [2023-08-30 16:34:51,467 INFO L137 encePairwiseOnDemand]: 180/190 looper letters, 99 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2023-08-30 16:34:51,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 133 transitions, 842 flow [2023-08-30 16:34:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:34:51,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:34:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 643 transitions. [2023-08-30 16:34:51,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48345864661654137 [2023-08-30 16:34:51,471 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 643 transitions. [2023-08-30 16:34:51,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 643 transitions. [2023-08-30 16:34:51,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:34:51,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 643 transitions. [2023-08-30 16:34:51,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 91.85714285714286) internal successors, (643), 7 states have internal predecessors, (643), 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 16:34:51,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 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 16:34:51,477 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 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 16:34:51,477 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 321 flow. Second operand 7 states and 643 transitions. [2023-08-30 16:34:51,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 133 transitions, 842 flow [2023-08-30 16:34:51,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 133 transitions, 770 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-30 16:34:51,505 INFO L231 Difference]: Finished difference. Result has 69 places, 83 transitions, 506 flow [2023-08-30 16:34:51,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=69, PETRI_TRANSITIONS=83} [2023-08-30 16:34:51,505 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2023-08-30 16:34:51,506 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 83 transitions, 506 flow [2023-08-30 16:34:51,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 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 16:34:51,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:51,506 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:34:51,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 16:34:51,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:34:51,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:51,507 INFO L85 PathProgramCache]: Analyzing trace with hash -284630156, now seen corresponding path program 1 times [2023-08-30 16:34:51,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:51,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435020948] [2023-08-30 16:34:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:51,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:51,611 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 16:34:51,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:51,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435020948] [2023-08-30 16:34:51,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435020948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:51,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:51,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:34:51,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641579945] [2023-08-30 16:34:51,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:51,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:34:51,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:51,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:34:51,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:34:51,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 190 [2023-08-30 16:34:51,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 83 transitions, 506 flow. Second operand has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 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 16:34:51,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:51,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 190 [2023-08-30 16:34:51,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:34:52,749 INFO L130 PetriNetUnfolder]: 6348/9527 cut-off events. [2023-08-30 16:34:52,749 INFO L131 PetriNetUnfolder]: For 14451/14483 co-relation queries the response was YES. [2023-08-30 16:34:52,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28223 conditions, 9527 events. 6348/9527 cut-off events. For 14451/14483 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 61776 event pairs, 989 based on Foata normal form. 110/9380 useless extension candidates. Maximal degree in co-relation 28198. Up to 6094 conditions per place. [2023-08-30 16:34:52,833 INFO L137 encePairwiseOnDemand]: 179/190 looper letters, 127 selfloop transitions, 36 changer transitions 0/172 dead transitions. [2023-08-30 16:34:52,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 172 transitions, 1177 flow [2023-08-30 16:34:52,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:34:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:34:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 810 transitions. [2023-08-30 16:34:52,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2023-08-30 16:34:52,836 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 810 transitions. [2023-08-30 16:34:52,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 810 transitions. [2023-08-30 16:34:52,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:34:52,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 810 transitions. [2023-08-30 16:34:52,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 90.0) internal successors, (810), 9 states have internal predecessors, (810), 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 16:34:52,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 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 16:34:52,843 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 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 16:34:52,843 INFO L175 Difference]: Start difference. First operand has 69 places, 83 transitions, 506 flow. Second operand 9 states and 810 transitions. [2023-08-30 16:34:52,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 172 transitions, 1177 flow [2023-08-30 16:34:52,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 172 transitions, 1151 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-08-30 16:34:52,908 INFO L231 Difference]: Finished difference. Result has 79 places, 94 transitions, 685 flow [2023-08-30 16:34:52,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=685, PETRI_PLACES=79, PETRI_TRANSITIONS=94} [2023-08-30 16:34:52,910 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 32 predicate places. [2023-08-30 16:34:52,910 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 94 transitions, 685 flow [2023-08-30 16:34:52,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 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 16:34:52,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:52,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:34:52,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 16:34:52,911 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:34:52,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:52,912 INFO L85 PathProgramCache]: Analyzing trace with hash -387139237, now seen corresponding path program 1 times [2023-08-30 16:34:52,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:52,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020118453] [2023-08-30 16:34:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:52,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:53,014 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 16:34:53,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:53,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020118453] [2023-08-30 16:34:53,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020118453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:53,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:53,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:34:53,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716483700] [2023-08-30 16:34:53,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:53,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 16:34:53,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:53,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 16:34:53,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 16:34:53,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 190 [2023-08-30 16:34:53,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 94 transitions, 685 flow. Second operand has 9 states, 9 states have (on average 73.77777777777777) internal successors, (664), 9 states have internal predecessors, (664), 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 16:34:53,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:53,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 190 [2023-08-30 16:34:53,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:34:54,692 INFO L130 PetriNetUnfolder]: 10699/15660 cut-off events. [2023-08-30 16:34:54,692 INFO L131 PetriNetUnfolder]: For 41222/41356 co-relation queries the response was YES. [2023-08-30 16:34:54,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49734 conditions, 15660 events. 10699/15660 cut-off events. For 41222/41356 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 105355 event pairs, 661 based on Foata normal form. 404/15745 useless extension candidates. Maximal degree in co-relation 49705. Up to 6484 conditions per place. [2023-08-30 16:34:54,806 INFO L137 encePairwiseOnDemand]: 176/190 looper letters, 214 selfloop transitions, 103 changer transitions 0/325 dead transitions. [2023-08-30 16:34:54,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 325 transitions, 2545 flow [2023-08-30 16:34:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 16:34:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 16:34:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1318 transitions. [2023-08-30 16:34:54,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624561403508772 [2023-08-30 16:34:54,811 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1318 transitions. [2023-08-30 16:34:54,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1318 transitions. [2023-08-30 16:34:54,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:34:54,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1318 transitions. [2023-08-30 16:34:54,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 87.86666666666666) internal successors, (1318), 15 states have internal predecessors, (1318), 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 16:34:54,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 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 16:34:54,819 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 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 16:34:54,819 INFO L175 Difference]: Start difference. First operand has 79 places, 94 transitions, 685 flow. Second operand 15 states and 1318 transitions. [2023-08-30 16:34:54,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 325 transitions, 2545 flow [2023-08-30 16:34:55,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 325 transitions, 2305 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-08-30 16:34:55,013 INFO L231 Difference]: Finished difference. Result has 96 places, 161 transitions, 1576 flow [2023-08-30 16:34:55,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1576, PETRI_PLACES=96, PETRI_TRANSITIONS=161} [2023-08-30 16:34:55,014 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 49 predicate places. [2023-08-30 16:34:55,014 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 161 transitions, 1576 flow [2023-08-30 16:34:55,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 73.77777777777777) internal successors, (664), 9 states have internal predecessors, (664), 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 16:34:55,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:55,015 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 16:34:55,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 16:34:55,015 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:34:55,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:55,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1562166797, now seen corresponding path program 1 times [2023-08-30 16:34:55,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:55,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413676517] [2023-08-30 16:34:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:55,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:55,092 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 16:34:55,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:55,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413676517] [2023-08-30 16:34:55,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413676517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:55,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:55,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:34:55,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389879823] [2023-08-30 16:34:55,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:55,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:34:55,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:55,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:34:55,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:34:55,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 190 [2023-08-30 16:34:55,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 161 transitions, 1576 flow. Second operand has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 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 16:34:55,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:55,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 190 [2023-08-30 16:34:55,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:34:57,157 INFO L130 PetriNetUnfolder]: 10921/16288 cut-off events. [2023-08-30 16:34:57,157 INFO L131 PetriNetUnfolder]: For 77336/77624 co-relation queries the response was YES. [2023-08-30 16:34:57,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62367 conditions, 16288 events. 10921/16288 cut-off events. For 77336/77624 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 112780 event pairs, 2009 based on Foata normal form. 86/16039 useless extension candidates. Maximal degree in co-relation 62329. Up to 12129 conditions per place. [2023-08-30 16:34:57,282 INFO L137 encePairwiseOnDemand]: 176/190 looper letters, 228 selfloop transitions, 71 changer transitions 0/307 dead transitions. [2023-08-30 16:34:57,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 307 transitions, 3162 flow [2023-08-30 16:34:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 16:34:57,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 16:34:57,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1218 transitions. [2023-08-30 16:34:57,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45789473684210524 [2023-08-30 16:34:57,286 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1218 transitions. [2023-08-30 16:34:57,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1218 transitions. [2023-08-30 16:34:57,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:34:57,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1218 transitions. [2023-08-30 16:34:57,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 87.0) internal successors, (1218), 14 states have internal predecessors, (1218), 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 16:34:57,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 190.0) internal successors, (2850), 15 states have internal predecessors, (2850), 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 16:34:57,294 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 190.0) internal successors, (2850), 15 states have internal predecessors, (2850), 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 16:34:57,294 INFO L175 Difference]: Start difference. First operand has 96 places, 161 transitions, 1576 flow. Second operand 14 states and 1218 transitions. [2023-08-30 16:34:57,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 307 transitions, 3162 flow [2023-08-30 16:34:57,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 307 transitions, 2898 flow, removed 80 selfloop flow, removed 7 redundant places. [2023-08-30 16:34:57,661 INFO L231 Difference]: Finished difference. Result has 107 places, 200 transitions, 2038 flow [2023-08-30 16:34:57,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2038, PETRI_PLACES=107, PETRI_TRANSITIONS=200} [2023-08-30 16:34:57,662 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 60 predicate places. [2023-08-30 16:34:57,662 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 200 transitions, 2038 flow [2023-08-30 16:34:57,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 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 16:34:57,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:57,662 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 16:34:57,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 16:34:57,663 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:34:57,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:57,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1587879437, now seen corresponding path program 2 times [2023-08-30 16:34:57,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:57,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289384339] [2023-08-30 16:34:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:57,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:57,731 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 16:34:57,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:57,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289384339] [2023-08-30 16:34:57,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289384339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:57,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:57,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:34:57,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216185199] [2023-08-30 16:34:57,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:57,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:34:57,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:57,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:34:57,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:34:57,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 190 [2023-08-30 16:34:57,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 200 transitions, 2038 flow. Second operand has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 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 16:34:57,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:57,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 190 [2023-08-30 16:34:57,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:35:00,031 INFO L130 PetriNetUnfolder]: 11868/17545 cut-off events. [2023-08-30 16:35:00,031 INFO L131 PetriNetUnfolder]: For 97830/98314 co-relation queries the response was YES. [2023-08-30 16:35:00,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69885 conditions, 17545 events. 11868/17545 cut-off events. For 97830/98314 co-relation queries the response was YES. Maximal size of possible extension queue 978. Compared 122242 event pairs, 2083 based on Foata normal form. 120/17314 useless extension candidates. Maximal degree in co-relation 69841. Up to 13122 conditions per place. [2023-08-30 16:35:00,159 INFO L137 encePairwiseOnDemand]: 176/190 looper letters, 261 selfloop transitions, 81 changer transitions 0/350 dead transitions. [2023-08-30 16:35:00,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 350 transitions, 3724 flow [2023-08-30 16:35:00,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 16:35:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 16:35:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1215 transitions. [2023-08-30 16:35:00,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567669172932331 [2023-08-30 16:35:00,165 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1215 transitions. [2023-08-30 16:35:00,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1215 transitions. [2023-08-30 16:35:00,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:35:00,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1215 transitions. [2023-08-30 16:35:00,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 86.78571428571429) internal successors, (1215), 14 states have internal predecessors, (1215), 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 16:35:00,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 190.0) internal successors, (2850), 15 states have internal predecessors, (2850), 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 16:35:00,173 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 190.0) internal successors, (2850), 15 states have internal predecessors, (2850), 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 16:35:00,173 INFO L175 Difference]: Start difference. First operand has 107 places, 200 transitions, 2038 flow. Second operand 14 states and 1215 transitions. [2023-08-30 16:35:00,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 350 transitions, 3724 flow [2023-08-30 16:35:00,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 350 transitions, 3487 flow, removed 97 selfloop flow, removed 5 redundant places. [2023-08-30 16:35:00,576 INFO L231 Difference]: Finished difference. Result has 120 places, 234 transitions, 2447 flow [2023-08-30 16:35:00,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2447, PETRI_PLACES=120, PETRI_TRANSITIONS=234} [2023-08-30 16:35:00,577 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 73 predicate places. [2023-08-30 16:35:00,577 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 234 transitions, 2447 flow [2023-08-30 16:35:00,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 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 16:35:00,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:35:00,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:35:00,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 16:35:00,578 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:35:00,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:35:00,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1621313785, now seen corresponding path program 1 times [2023-08-30 16:35:00,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:35:00,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522052623] [2023-08-30 16:35:00,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:35:00,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:35:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:35:00,673 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 16:35:00,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:35:00,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522052623] [2023-08-30 16:35:00,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522052623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:35:00,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:35:00,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 16:35:00,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950956211] [2023-08-30 16:35:00,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:35:00,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:35:00,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:35:00,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:35:00,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:35:00,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 190 [2023-08-30 16:35:00,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 234 transitions, 2447 flow. Second operand has 10 states, 10 states have (on average 71.8) internal successors, (718), 10 states have internal predecessors, (718), 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 16:35:00,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:35:00,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 190 [2023-08-30 16:35:00,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:35:03,601 INFO L130 PetriNetUnfolder]: 14778/21483 cut-off events. [2023-08-30 16:35:03,601 INFO L131 PetriNetUnfolder]: For 151468/151762 co-relation queries the response was YES. [2023-08-30 16:35:03,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88368 conditions, 21483 events. 14778/21483 cut-off events. For 151468/151762 co-relation queries the response was YES. Maximal size of possible extension queue 1141. Compared 148747 event pairs, 1021 based on Foata normal form. 250/21402 useless extension candidates. Maximal degree in co-relation 88319. Up to 8536 conditions per place. [2023-08-30 16:35:03,781 INFO L137 encePairwiseOnDemand]: 175/190 looper letters, 279 selfloop transitions, 179 changer transitions 10/477 dead transitions. [2023-08-30 16:35:03,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 477 transitions, 5018 flow [2023-08-30 16:35:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 16:35:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 16:35:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1455 transitions. [2023-08-30 16:35:03,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4504643962848297 [2023-08-30 16:35:03,785 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1455 transitions. [2023-08-30 16:35:03,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1455 transitions. [2023-08-30 16:35:03,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:35:03,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1455 transitions. [2023-08-30 16:35:03,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 85.58823529411765) internal successors, (1455), 17 states have internal predecessors, (1455), 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 16:35:03,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 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 16:35:03,796 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 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 16:35:03,797 INFO L175 Difference]: Start difference. First operand has 120 places, 234 transitions, 2447 flow. Second operand 17 states and 1455 transitions. [2023-08-30 16:35:03,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 477 transitions, 5018 flow [2023-08-30 16:35:04,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 477 transitions, 4696 flow, removed 99 selfloop flow, removed 6 redundant places. [2023-08-30 16:35:04,510 INFO L231 Difference]: Finished difference. Result has 133 places, 269 transitions, 3103 flow [2023-08-30 16:35:04,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=2180, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3103, PETRI_PLACES=133, PETRI_TRANSITIONS=269} [2023-08-30 16:35:04,511 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 86 predicate places. [2023-08-30 16:35:04,511 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 269 transitions, 3103 flow [2023-08-30 16:35:04,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 71.8) internal successors, (718), 10 states have internal predecessors, (718), 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 16:35:04,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:35:04,512 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:35:04,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 16:35:04,512 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:35:04,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:35:04,513 INFO L85 PathProgramCache]: Analyzing trace with hash 2072422931, now seen corresponding path program 1 times [2023-08-30 16:35:04,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:35:04,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110983850] [2023-08-30 16:35:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:35:04,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:35:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:35:04,615 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 16:35:04,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:35:04,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110983850] [2023-08-30 16:35:04,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110983850] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:35:04,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:35:04,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 16:35:04,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669997288] [2023-08-30 16:35:04,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:35:04,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:35:04,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:35:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:35:04,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:35:04,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 190 [2023-08-30 16:35:04,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 269 transitions, 3103 flow. Second operand has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 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 16:35:04,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:35:04,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 190 [2023-08-30 16:35:04,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:35:07,534 INFO L130 PetriNetUnfolder]: 15265/22684 cut-off events. [2023-08-30 16:35:07,534 INFO L131 PetriNetUnfolder]: For 198844/199508 co-relation queries the response was YES. [2023-08-30 16:35:07,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100701 conditions, 22684 events. 15265/22684 cut-off events. For 198844/199508 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 163609 event pairs, 1901 based on Foata normal form. 356/22805 useless extension candidates. Maximal degree in co-relation 100649. Up to 12216 conditions per place. [2023-08-30 16:35:07,774 INFO L137 encePairwiseOnDemand]: 176/190 looper letters, 271 selfloop transitions, 197 changer transitions 0/477 dead transitions. [2023-08-30 16:35:07,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 477 transitions, 5826 flow [2023-08-30 16:35:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 16:35:07,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 16:35:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1448 transitions. [2023-08-30 16:35:07,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448297213622291 [2023-08-30 16:35:07,777 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1448 transitions. [2023-08-30 16:35:07,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1448 transitions. [2023-08-30 16:35:07,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:35:07,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1448 transitions. [2023-08-30 16:35:07,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 85.17647058823529) internal successors, (1448), 17 states have internal predecessors, (1448), 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 16:35:07,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 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 16:35:07,785 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 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 16:35:07,785 INFO L175 Difference]: Start difference. First operand has 133 places, 269 transitions, 3103 flow. Second operand 17 states and 1448 transitions. [2023-08-30 16:35:07,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 477 transitions, 5826 flow [2023-08-30 16:35:08,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 477 transitions, 5562 flow, removed 49 selfloop flow, removed 11 redundant places. [2023-08-30 16:35:08,806 INFO L231 Difference]: Finished difference. Result has 144 places, 334 transitions, 4474 flow [2023-08-30 16:35:08,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=2873, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4474, PETRI_PLACES=144, PETRI_TRANSITIONS=334} [2023-08-30 16:35:08,807 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 97 predicate places. [2023-08-30 16:35:08,807 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 334 transitions, 4474 flow [2023-08-30 16:35:08,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 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 16:35:08,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:35:08,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:35:08,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 16:35:08,808 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:35:08,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:35:08,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1996273818, now seen corresponding path program 1 times [2023-08-30 16:35:08,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:35:08,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118326145] [2023-08-30 16:35:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:35:08,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:35:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:35:08,912 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 16:35:08,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:35:08,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118326145] [2023-08-30 16:35:08,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118326145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:35:08,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:35:08,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 16:35:08,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190990232] [2023-08-30 16:35:08,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:35:08,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:35:08,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:35:08,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:35:08,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:35:09,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 190 [2023-08-30 16:35:09,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 334 transitions, 4474 flow. Second operand has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 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 16:35:09,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:35:09,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 190 [2023-08-30 16:35:09,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:35:12,508 INFO L130 PetriNetUnfolder]: 16792/25101 cut-off events. [2023-08-30 16:35:12,508 INFO L131 PetriNetUnfolder]: For 280990/281844 co-relation queries the response was YES. [2023-08-30 16:35:12,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120812 conditions, 25101 events. 16792/25101 cut-off events. For 280990/281844 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 185390 event pairs, 2981 based on Foata normal form. 350/25174 useless extension candidates. Maximal degree in co-relation 120753. Up to 18440 conditions per place. [2023-08-30 16:35:12,939 INFO L137 encePairwiseOnDemand]: 176/190 looper letters, 362 selfloop transitions, 121 changer transitions 0/492 dead transitions. [2023-08-30 16:35:12,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 492 transitions, 6926 flow [2023-08-30 16:35:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 16:35:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 16:35:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1272 transitions. [2023-08-30 16:35:12,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463157894736842 [2023-08-30 16:35:12,942 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1272 transitions. [2023-08-30 16:35:12,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1272 transitions. [2023-08-30 16:35:12,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:35:12,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1272 transitions. [2023-08-30 16:35:12,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 84.8) internal successors, (1272), 15 states have internal predecessors, (1272), 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 16:35:12,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 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 16:35:12,949 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 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 16:35:12,949 INFO L175 Difference]: Start difference. First operand has 144 places, 334 transitions, 4474 flow. Second operand 15 states and 1272 transitions. [2023-08-30 16:35:12,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 492 transitions, 6926 flow [2023-08-30 16:35:14,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 492 transitions, 6558 flow, removed 175 selfloop flow, removed 4 redundant places. [2023-08-30 16:35:14,431 INFO L231 Difference]: Finished difference. Result has 157 places, 366 transitions, 5135 flow [2023-08-30 16:35:14,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5135, PETRI_PLACES=157, PETRI_TRANSITIONS=366} [2023-08-30 16:35:14,432 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 110 predicate places. [2023-08-30 16:35:14,432 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 366 transitions, 5135 flow [2023-08-30 16:35:14,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 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 16:35:14,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:35:14,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:35:14,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 16:35:14,433 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:35:14,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:35:14,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1196385468, now seen corresponding path program 2 times [2023-08-30 16:35:14,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:35:14,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947971247] [2023-08-30 16:35:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:35:14,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:35:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:35:14,586 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 16:35:14,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:35:14,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947971247] [2023-08-30 16:35:14,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947971247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:35:14,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:35:14,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:35:14,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266339271] [2023-08-30 16:35:14,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:35:14,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:35:14,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:35:14,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:35:14,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:35:14,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 190 [2023-08-30 16:35:14,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 366 transitions, 5135 flow. Second operand has 7 states, 7 states have (on average 77.14285714285714) internal successors, (540), 7 states have internal predecessors, (540), 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 16:35:14,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:35:14,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 190 [2023-08-30 16:35:14,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:35:18,437 INFO L130 PetriNetUnfolder]: 17569/26354 cut-off events. [2023-08-30 16:35:18,437 INFO L131 PetriNetUnfolder]: For 315316/316356 co-relation queries the response was YES. [2023-08-30 16:35:18,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128937 conditions, 26354 events. 17569/26354 cut-off events. For 315316/316356 co-relation queries the response was YES. Maximal size of possible extension queue 1455. Compared 196708 event pairs, 3379 based on Foata normal form. 284/26331 useless extension candidates. Maximal degree in co-relation 128875. Up to 21690 conditions per place. [2023-08-30 16:35:18,763 INFO L137 encePairwiseOnDemand]: 177/190 looper letters, 385 selfloop transitions, 76 changer transitions 0/476 dead transitions. [2023-08-30 16:35:18,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 476 transitions, 6999 flow [2023-08-30 16:35:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 16:35:18,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 16:35:18,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1041 transitions. [2023-08-30 16:35:18,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45657894736842103 [2023-08-30 16:35:18,765 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1041 transitions. [2023-08-30 16:35:18,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1041 transitions. [2023-08-30 16:35:18,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:35:18,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1041 transitions. [2023-08-30 16:35:18,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 86.75) internal successors, (1041), 12 states have internal predecessors, (1041), 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 16:35:18,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 190.0) internal successors, (2470), 13 states have internal predecessors, (2470), 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 16:35:18,771 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 190.0) internal successors, (2470), 13 states have internal predecessors, (2470), 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 16:35:18,771 INFO L175 Difference]: Start difference. First operand has 157 places, 366 transitions, 5135 flow. Second operand 12 states and 1041 transitions. [2023-08-30 16:35:18,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 476 transitions, 6999 flow [2023-08-30 16:35:20,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 476 transitions, 6642 flow, removed 100 selfloop flow, removed 11 redundant places. [2023-08-30 16:35:20,518 INFO L231 Difference]: Finished difference. Result has 160 places, 393 transitions, 5544 flow [2023-08-30 16:35:20,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5544, PETRI_PLACES=160, PETRI_TRANSITIONS=393} [2023-08-30 16:35:20,519 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 113 predicate places. [2023-08-30 16:35:20,519 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 393 transitions, 5544 flow [2023-08-30 16:35:20,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.14285714285714) internal successors, (540), 7 states have internal predecessors, (540), 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 16:35:20,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:35:20,520 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:35:20,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 16:35:20,520 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:35:20,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:35:20,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1181835622, now seen corresponding path program 3 times [2023-08-30 16:35:20,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:35:20,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124841881] [2023-08-30 16:35:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:35:20,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:35:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:35:20,617 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 16:35:20,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:35:20,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124841881] [2023-08-30 16:35:20,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124841881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:35:20,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:35:20,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 16:35:20,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931302940] [2023-08-30 16:35:20,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:35:20,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:35:20,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:35:20,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:35:20,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:35:20,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 190 [2023-08-30 16:35:20,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 393 transitions, 5544 flow. Second operand has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 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 16:35:20,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:35:20,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 190 [2023-08-30 16:35:20,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:35:25,264 INFO L130 PetriNetUnfolder]: 19483/29086 cut-off events. [2023-08-30 16:35:25,264 INFO L131 PetriNetUnfolder]: For 380034/381220 co-relation queries the response was YES. [2023-08-30 16:35:25,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142912 conditions, 29086 events. 19483/29086 cut-off events. For 380034/381220 co-relation queries the response was YES. Maximal size of possible extension queue 1661. Compared 220386 event pairs, 3063 based on Foata normal form. 436/29241 useless extension candidates. Maximal degree in co-relation 142847. Up to 15916 conditions per place. [2023-08-30 16:35:25,661 INFO L137 encePairwiseOnDemand]: 176/190 looper letters, 356 selfloop transitions, 224 changer transitions 0/589 dead transitions. [2023-08-30 16:35:25,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 589 transitions, 8566 flow [2023-08-30 16:35:25,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 16:35:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 16:35:25,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1446 transitions. [2023-08-30 16:35:25,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476780185758514 [2023-08-30 16:35:25,664 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1446 transitions. [2023-08-30 16:35:25,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1446 transitions. [2023-08-30 16:35:25,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:35:25,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1446 transitions. [2023-08-30 16:35:25,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 85.05882352941177) internal successors, (1446), 17 states have internal predecessors, (1446), 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 16:35:25,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 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 16:35:25,674 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 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 16:35:25,674 INFO L175 Difference]: Start difference. First operand has 160 places, 393 transitions, 5544 flow. Second operand 17 states and 1446 transitions. [2023-08-30 16:35:25,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 589 transitions, 8566 flow [2023-08-30 16:35:27,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 589 transitions, 8301 flow, removed 128 selfloop flow, removed 2 redundant places. [2023-08-30 16:35:27,822 INFO L231 Difference]: Finished difference. Result has 180 places, 436 transitions, 6842 flow [2023-08-30 16:35:27,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=5279, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6842, PETRI_PLACES=180, PETRI_TRANSITIONS=436} [2023-08-30 16:35:27,823 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 133 predicate places. [2023-08-30 16:35:27,823 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 436 transitions, 6842 flow [2023-08-30 16:35:27,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 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 16:35:27,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:35:27,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:35:27,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 16:35:27,824 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:35:27,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:35:27,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1238743469, now seen corresponding path program 2 times [2023-08-30 16:35:27,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:35:27,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920435065] [2023-08-30 16:35:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:35:27,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:35:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:35:27,921 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 16:35:27,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:35:27,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920435065] [2023-08-30 16:35:27,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920435065] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:35:27,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:35:27,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 16:35:27,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491476591] [2023-08-30 16:35:27,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:35:27,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:35:27,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:35:27,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:35:27,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:35:28,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 190 [2023-08-30 16:35:28,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 436 transitions, 6842 flow. Second operand has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 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 16:35:28,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:35:28,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 190 [2023-08-30 16:35:28,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:35:33,244 INFO L130 PetriNetUnfolder]: 20401/30418 cut-off events. [2023-08-30 16:35:33,244 INFO L131 PetriNetUnfolder]: For 447826/449016 co-relation queries the response was YES. [2023-08-30 16:35:33,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157691 conditions, 30418 events. 20401/30418 cut-off events. For 447826/449016 co-relation queries the response was YES. Maximal size of possible extension queue 1739. Compared 231823 event pairs, 3869 based on Foata normal form. 424/30503 useless extension candidates. Maximal degree in co-relation 157619. Up to 23360 conditions per place. [2023-08-30 16:35:33,693 INFO L137 encePairwiseOnDemand]: 176/190 looper letters, 454 selfloop transitions, 122 changer transitions 0/585 dead transitions. [2023-08-30 16:35:33,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 585 transitions, 9446 flow [2023-08-30 16:35:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 16:35:33,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 16:35:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1274 transitions. [2023-08-30 16:35:33,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44701754385964915 [2023-08-30 16:35:33,696 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1274 transitions. [2023-08-30 16:35:33,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1274 transitions. [2023-08-30 16:35:33,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:35:33,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1274 transitions. [2023-08-30 16:35:33,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 84.93333333333334) internal successors, (1274), 15 states have internal predecessors, (1274), 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 16:35:33,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 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 16:35:33,701 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 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 16:35:33,702 INFO L175 Difference]: Start difference. First operand has 180 places, 436 transitions, 6842 flow. Second operand 15 states and 1274 transitions. [2023-08-30 16:35:33,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 585 transitions, 9446 flow [2023-08-30 16:35:36,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 585 transitions, 9022 flow, removed 203 selfloop flow, removed 5 redundant places. [2023-08-30 16:35:36,994 INFO L231 Difference]: Finished difference. Result has 192 places, 455 transitions, 7309 flow [2023-08-30 16:35:36,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7309, PETRI_PLACES=192, PETRI_TRANSITIONS=455} [2023-08-30 16:35:36,995 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 145 predicate places. [2023-08-30 16:35:36,995 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 455 transitions, 7309 flow [2023-08-30 16:35:36,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 75.0) internal successors, (600), 8 states have internal predecessors, (600), 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 16:35:36,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:35:36,996 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] [2023-08-30 16:35:36,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 16:35:36,996 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:35:36,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:35:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1403233678, now seen corresponding path program 1 times [2023-08-30 16:35:36,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:35:36,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946074527] [2023-08-30 16:35:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:35:36,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:35:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:35:37,092 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 16:35:37,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:35:37,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946074527] [2023-08-30 16:35:37,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946074527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:35:37,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:35:37,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:35:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308188889] [2023-08-30 16:35:37,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:35:37,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 16:35:37,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:35:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 16:35:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 16:35:37,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 190 [2023-08-30 16:35:37,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 455 transitions, 7309 flow. Second operand has 9 states, 9 states have (on average 73.88888888888889) internal successors, (665), 9 states have internal predecessors, (665), 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 16:35:37,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:35:37,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 190 [2023-08-30 16:35:37,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:35:43,989 INFO L130 PetriNetUnfolder]: 26857/39028 cut-off events. [2023-08-30 16:35:43,989 INFO L131 PetriNetUnfolder]: For 576010/577160 co-relation queries the response was YES. [2023-08-30 16:35:44,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202896 conditions, 39028 events. 26857/39028 cut-off events. For 576010/577160 co-relation queries the response was YES. Maximal size of possible extension queue 2229. Compared 295058 event pairs, 2015 based on Foata normal form. 606/39271 useless extension candidates. Maximal degree in co-relation 202821. Up to 18350 conditions per place. [2023-08-30 16:35:44,659 INFO L137 encePairwiseOnDemand]: 175/190 looper letters, 425 selfloop transitions, 401 changer transitions 0/840 dead transitions. [2023-08-30 16:35:44,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 840 transitions, 13845 flow [2023-08-30 16:35:44,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 16:35:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 16:35:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1303 transitions. [2023-08-30 16:35:44,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4571929824561404 [2023-08-30 16:35:44,662 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1303 transitions. [2023-08-30 16:35:44,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1303 transitions. [2023-08-30 16:35:44,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:35:44,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1303 transitions. [2023-08-30 16:35:44,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 86.86666666666666) internal successors, (1303), 15 states have internal predecessors, (1303), 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 16:35:44,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 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 16:35:44,668 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 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 16:35:44,668 INFO L175 Difference]: Start difference. First operand has 192 places, 455 transitions, 7309 flow. Second operand 15 states and 1303 transitions. [2023-08-30 16:35:44,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 840 transitions, 13845 flow [2023-08-30 16:35:48,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 840 transitions, 13334 flow, removed 147 selfloop flow, removed 11 redundant places. [2023-08-30 16:35:48,797 INFO L231 Difference]: Finished difference. Result has 204 places, 634 transitions, 11764 flow [2023-08-30 16:35:48,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=6987, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11764, PETRI_PLACES=204, PETRI_TRANSITIONS=634} [2023-08-30 16:35:48,797 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 157 predicate places. [2023-08-30 16:35:48,797 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 634 transitions, 11764 flow [2023-08-30 16:35:48,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 73.88888888888889) internal successors, (665), 9 states have internal predecessors, (665), 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 16:35:48,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:35:48,798 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 16:35:48,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 16:35:48,798 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:35:48,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:35:48,799 INFO L85 PathProgramCache]: Analyzing trace with hash 396651458, now seen corresponding path program 1 times [2023-08-30 16:35:48,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:35:48,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325674772] [2023-08-30 16:35:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:35:48,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:35:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:35:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:35:48,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:35:48,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325674772] [2023-08-30 16:35:48,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325674772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:35:48,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34721436] [2023-08-30 16:35:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:35:48,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:35:48,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:35:48,897 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 16:35:48,925 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 16:35:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:35:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 16:35:49,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:35:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:35:49,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:35:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:35:49,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34721436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:35:49,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:35:49,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-08-30 16:35:49,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785436172] [2023-08-30 16:35:49,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:35:49,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 16:35:49,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:35:49,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 16:35:49,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-08-30 16:35:49,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 190 [2023-08-30 16:35:49,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 634 transitions, 11764 flow. Second operand has 15 states, 15 states have (on average 72.13333333333334) internal successors, (1082), 15 states have internal predecessors, (1082), 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 16:35:49,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:35:49,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 190 [2023-08-30 16:35:49,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:35:58,464 INFO L130 PetriNetUnfolder]: 28010/41577 cut-off events. [2023-08-30 16:35:58,465 INFO L131 PetriNetUnfolder]: For 888748/889940 co-relation queries the response was YES. [2023-08-30 16:35:58,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246153 conditions, 41577 events. 28010/41577 cut-off events. For 888748/889940 co-relation queries the response was YES. Maximal size of possible extension queue 2479. Compared 326480 event pairs, 2581 based on Foata normal form. 1068/42292 useless extension candidates. Maximal degree in co-relation 246069. Up to 11161 conditions per place. [2023-08-30 16:35:59,186 INFO L137 encePairwiseOnDemand]: 175/190 looper letters, 477 selfloop transitions, 688 changer transitions 0/1175 dead transitions. [2023-08-30 16:35:59,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 1175 transitions, 20859 flow [2023-08-30 16:35:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 16:35:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 16:35:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3630 transitions. [2023-08-30 16:35:59,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41533180778032036 [2023-08-30 16:35:59,191 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3630 transitions. [2023-08-30 16:35:59,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3630 transitions. [2023-08-30 16:35:59,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:35:59,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3630 transitions. [2023-08-30 16:35:59,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 78.91304347826087) internal successors, (3630), 46 states have internal predecessors, (3630), 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 16:35:59,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 190.0) internal successors, (8930), 47 states have internal predecessors, (8930), 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 16:35:59,203 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 190.0) internal successors, (8930), 47 states have internal predecessors, (8930), 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 16:35:59,204 INFO L175 Difference]: Start difference. First operand has 204 places, 634 transitions, 11764 flow. Second operand 46 states and 3630 transitions. [2023-08-30 16:35:59,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 1175 transitions, 20859 flow [2023-08-30 16:36:06,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 1175 transitions, 19973 flow, removed 340 selfloop flow, removed 6 redundant places. [2023-08-30 16:36:06,342 INFO L231 Difference]: Finished difference. Result has 259 places, 797 transitions, 16698 flow [2023-08-30 16:36:06,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=11137, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=16698, PETRI_PLACES=259, PETRI_TRANSITIONS=797} [2023-08-30 16:36:06,343 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 212 predicate places. [2023-08-30 16:36:06,343 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 797 transitions, 16698 flow [2023-08-30 16:36:06,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 72.13333333333334) internal successors, (1082), 15 states have internal predecessors, (1082), 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 16:36:06,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:36:06,343 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] [2023-08-30 16:36:06,349 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 16:36:06,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 16:36:06,544 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:36:06,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:36:06,545 INFO L85 PathProgramCache]: Analyzing trace with hash 112198516, now seen corresponding path program 1 times [2023-08-30 16:36:06,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:36:06,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910934617] [2023-08-30 16:36:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:36:06,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:36:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:36:06,647 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 16:36:06,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:36:06,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910934617] [2023-08-30 16:36:06,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910934617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:36:06,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:36:06,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 16:36:06,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200262134] [2023-08-30 16:36:06,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:36:06,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:36:06,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:36:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:36:06,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:36:06,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 190 [2023-08-30 16:36:06,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 797 transitions, 16698 flow. Second operand has 10 states, 10 states have (on average 71.9) internal successors, (719), 10 states have internal predecessors, (719), 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 16:36:06,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:36:06,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 190 [2023-08-30 16:36:06,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:36:18,251 INFO L130 PetriNetUnfolder]: 33794/49311 cut-off events. [2023-08-30 16:36:18,251 INFO L131 PetriNetUnfolder]: For 1243390/1244620 co-relation queries the response was YES. [2023-08-30 16:36:19,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316134 conditions, 49311 events. 33794/49311 cut-off events. For 1243390/1244620 co-relation queries the response was YES. Maximal size of possible extension queue 2966. Compared 385525 event pairs, 2373 based on Foata normal form. 810/49684 useless extension candidates. Maximal degree in co-relation 316033. Up to 21188 conditions per place. [2023-08-30 16:36:19,541 INFO L137 encePairwiseOnDemand]: 174/190 looper letters, 550 selfloop transitions, 581 changer transitions 63/1209 dead transitions. [2023-08-30 16:36:19,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 1209 transitions, 25592 flow [2023-08-30 16:36:19,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 16:36:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 16:36:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1522 transitions. [2023-08-30 16:36:19,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4450292397660819 [2023-08-30 16:36:19,544 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1522 transitions. [2023-08-30 16:36:19,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1522 transitions. [2023-08-30 16:36:19,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:36:19,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1522 transitions. [2023-08-30 16:36:19,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 84.55555555555556) internal successors, (1522), 18 states have internal predecessors, (1522), 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 16:36:19,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 190.0) internal successors, (3610), 19 states have internal predecessors, (3610), 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 16:36:19,549 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 190.0) internal successors, (3610), 19 states have internal predecessors, (3610), 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 16:36:19,549 INFO L175 Difference]: Start difference. First operand has 259 places, 797 transitions, 16698 flow. Second operand 18 states and 1522 transitions. [2023-08-30 16:36:19,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 1209 transitions, 25592 flow [2023-08-30 16:36:31,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 1209 transitions, 22699 flow, removed 1235 selfloop flow, removed 13 redundant places. [2023-08-30 16:36:31,679 INFO L231 Difference]: Finished difference. Result has 268 places, 883 transitions, 18368 flow [2023-08-30 16:36:31,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=14736, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=18368, PETRI_PLACES=268, PETRI_TRANSITIONS=883} [2023-08-30 16:36:31,680 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 221 predicate places. [2023-08-30 16:36:31,680 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 883 transitions, 18368 flow [2023-08-30 16:36:31,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 71.9) internal successors, (719), 10 states have internal predecessors, (719), 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 16:36:31,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:36:31,681 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] [2023-08-30 16:36:31,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 16:36:31,681 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:36:31,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:36:31,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1392305540, now seen corresponding path program 1 times [2023-08-30 16:36:31,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:36:31,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647452396] [2023-08-30 16:36:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:36:31,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:36:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:36:31,805 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 16:36:31,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:36:31,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647452396] [2023-08-30 16:36:31,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647452396] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:36:31,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:36:31,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 16:36:31,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587504178] [2023-08-30 16:36:31,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:36:31,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:36:31,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:36:31,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:36:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:36:31,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 190 [2023-08-30 16:36:31,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 883 transitions, 18368 flow. Second operand has 10 states, 10 states have (on average 71.0) internal successors, (710), 10 states have internal predecessors, (710), 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 16:36:31,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:36:31,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 190 [2023-08-30 16:36:31,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:36:43,256 INFO L130 PetriNetUnfolder]: 34669/50792 cut-off events. [2023-08-30 16:36:43,256 INFO L131 PetriNetUnfolder]: For 1213949/1215513 co-relation queries the response was YES. [2023-08-30 16:36:44,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323231 conditions, 50792 events. 34669/50792 cut-off events. For 1213949/1215513 co-relation queries the response was YES. Maximal size of possible extension queue 3081. Compared 401934 event pairs, 2035 based on Foata normal form. 966/51618 useless extension candidates. Maximal degree in co-relation 323124. Up to 22987 conditions per place. [2023-08-30 16:36:44,881 INFO L137 encePairwiseOnDemand]: 174/190 looper letters, 529 selfloop transitions, 708 changer transitions 5/1250 dead transitions. [2023-08-30 16:36:44,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1250 transitions, 25714 flow [2023-08-30 16:36:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 16:36:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 16:36:44,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2184 transitions. [2023-08-30 16:36:44,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257309941520468 [2023-08-30 16:36:44,885 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2184 transitions. [2023-08-30 16:36:44,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2184 transitions. [2023-08-30 16:36:44,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:36:44,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2184 transitions. [2023-08-30 16:36:44,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 80.88888888888889) internal successors, (2184), 27 states have internal predecessors, (2184), 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 16:36:44,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 190.0) internal successors, (5320), 28 states have internal predecessors, (5320), 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 16:36:44,893 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 190.0) internal successors, (5320), 28 states have internal predecessors, (5320), 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 16:36:44,893 INFO L175 Difference]: Start difference. First operand has 268 places, 883 transitions, 18368 flow. Second operand 27 states and 2184 transitions. [2023-08-30 16:36:44,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1250 transitions, 25714 flow [2023-08-30 16:36:59,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1250 transitions, 24899 flow, removed 201 selfloop flow, removed 10 redundant places. [2023-08-30 16:36:59,152 INFO L231 Difference]: Finished difference. Result has 293 places, 990 transitions, 22669 flow [2023-08-30 16:36:59,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=17706, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=607, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=22669, PETRI_PLACES=293, PETRI_TRANSITIONS=990} [2023-08-30 16:36:59,153 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 246 predicate places. [2023-08-30 16:36:59,154 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 990 transitions, 22669 flow [2023-08-30 16:36:59,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 71.0) internal successors, (710), 10 states have internal predecessors, (710), 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 16:36:59,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:36:59,154 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] [2023-08-30 16:36:59,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 16:36:59,155 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:36:59,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:36:59,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1303559548, now seen corresponding path program 2 times [2023-08-30 16:36:59,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:36:59,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346403291] [2023-08-30 16:36:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:36:59,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:36:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:36:59,261 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 16:36:59,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:36:59,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346403291] [2023-08-30 16:36:59,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346403291] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:36:59,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:36:59,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 16:36:59,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573392995] [2023-08-30 16:36:59,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:36:59,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:36:59,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:36:59,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:36:59,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:36:59,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 190 [2023-08-30 16:36:59,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 990 transitions, 22669 flow. Second operand has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 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 16:36:59,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:36:59,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 190 [2023-08-30 16:36:59,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:16,353 INFO L130 PetriNetUnfolder]: 37239/54688 cut-off events. [2023-08-30 16:37:16,353 INFO L131 PetriNetUnfolder]: For 1545185/1546695 co-relation queries the response was YES. [2023-08-30 16:37:17,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372829 conditions, 54688 events. 37239/54688 cut-off events. For 1545185/1546695 co-relation queries the response was YES. Maximal size of possible extension queue 3268. Compared 438089 event pairs, 6651 based on Foata normal form. 540/55044 useless extension candidates. Maximal degree in co-relation 372712. Up to 44654 conditions per place. [2023-08-30 16:37:17,696 INFO L137 encePairwiseOnDemand]: 175/190 looper letters, 1068 selfloop transitions, 243 changer transitions 0/1319 dead transitions. [2023-08-30 16:37:17,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 1319 transitions, 30597 flow [2023-08-30 16:37:17,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 16:37:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 16:37:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1957 transitions. [2023-08-30 16:37:17,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2023-08-30 16:37:17,699 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1957 transitions. [2023-08-30 16:37:17,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1957 transitions. [2023-08-30 16:37:17,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:17,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1957 transitions. [2023-08-30 16:37:17,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 81.54166666666667) internal successors, (1957), 24 states have internal predecessors, (1957), 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 16:37:17,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 190.0) internal successors, (4750), 25 states have internal predecessors, (4750), 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 16:37:17,706 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 190.0) internal successors, (4750), 25 states have internal predecessors, (4750), 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 16:37:17,706 INFO L175 Difference]: Start difference. First operand has 293 places, 990 transitions, 22669 flow. Second operand 24 states and 1957 transitions. [2023-08-30 16:37:17,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 1319 transitions, 30597 flow [2023-08-30 16:37:36,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1319 transitions, 29888 flow, removed 320 selfloop flow, removed 6 redundant places. [2023-08-30 16:37:36,511 INFO L231 Difference]: Finished difference. Result has 318 places, 1082 transitions, 25120 flow [2023-08-30 16:37:36,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=22134, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=25120, PETRI_PLACES=318, PETRI_TRANSITIONS=1082} [2023-08-30 16:37:36,512 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 271 predicate places. [2023-08-30 16:37:36,512 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 1082 transitions, 25120 flow [2023-08-30 16:37:36,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 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 16:37:36,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:36,513 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] [2023-08-30 16:37:36,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 16:37:36,513 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:36,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:36,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1099617128, now seen corresponding path program 1 times [2023-08-30 16:37:36,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:36,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970985349] [2023-08-30 16:37:36,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:36,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:36,614 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 16:37:36,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:36,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970985349] [2023-08-30 16:37:36,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970985349] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:36,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:36,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 16:37:36,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108286661] [2023-08-30 16:37:36,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:36,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:37:36,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:36,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:37:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:37:36,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 190 [2023-08-30 16:37:36,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 1082 transitions, 25120 flow. Second operand has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 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 16:37:36,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:36,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 190 [2023-08-30 16:37:36,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:56,419 INFO L130 PetriNetUnfolder]: 39800/58265 cut-off events. [2023-08-30 16:37:56,419 INFO L131 PetriNetUnfolder]: For 1763338/1764698 co-relation queries the response was YES. [2023-08-30 16:37:57,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405678 conditions, 58265 events. 39800/58265 cut-off events. For 1763338/1764698 co-relation queries the response was YES. Maximal size of possible extension queue 3494. Compared 466674 event pairs, 6687 based on Foata normal form. 576/58499 useless extension candidates. Maximal degree in co-relation 405553. Up to 46276 conditions per place. [2023-08-30 16:37:58,109 INFO L137 encePairwiseOnDemand]: 174/190 looper letters, 1101 selfloop transitions, 317 changer transitions 0/1433 dead transitions. [2023-08-30 16:37:58,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1433 transitions, 34444 flow [2023-08-30 16:37:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 16:37:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 16:37:58,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1804 transitions. [2023-08-30 16:37:58,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43157894736842106 [2023-08-30 16:37:58,112 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1804 transitions. [2023-08-30 16:37:58,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1804 transitions. [2023-08-30 16:37:58,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:58,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1804 transitions. [2023-08-30 16:37:58,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 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 16:37:58,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 190.0) internal successors, (4370), 23 states have internal predecessors, (4370), 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 16:37:58,118 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 190.0) internal successors, (4370), 23 states have internal predecessors, (4370), 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 16:37:58,118 INFO L175 Difference]: Start difference. First operand has 318 places, 1082 transitions, 25120 flow. Second operand 22 states and 1804 transitions. [2023-08-30 16:37:58,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1433 transitions, 34444 flow [2023-08-30 16:38:16,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1433 transitions, 33705 flow, removed 287 selfloop flow, removed 9 redundant places. [2023-08-30 16:38:17,015 INFO L231 Difference]: Finished difference. Result has 337 places, 1203 transitions, 28721 flow [2023-08-30 16:38:17,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=24568, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=28721, PETRI_PLACES=337, PETRI_TRANSITIONS=1203} [2023-08-30 16:38:17,016 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 290 predicate places. [2023-08-30 16:38:17,017 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 1203 transitions, 28721 flow [2023-08-30 16:38:17,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 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 16:38:17,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:17,017 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] [2023-08-30 16:38:17,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 16:38:17,017 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:38:17,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:17,017 INFO L85 PathProgramCache]: Analyzing trace with hash -853114316, now seen corresponding path program 3 times [2023-08-30 16:38:17,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:17,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023257243] [2023-08-30 16:38:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:17,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:17,116 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 16:38:17,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:17,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023257243] [2023-08-30 16:38:17,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023257243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:17,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:17,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:38:17,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553931795] [2023-08-30 16:38:17,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:17,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 16:38:17,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:17,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 16:38:17,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 16:38:17,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 190 [2023-08-30 16:38:17,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 1203 transitions, 28721 flow. Second operand has 9 states, 9 states have (on average 73.11111111111111) internal successors, (658), 9 states have internal predecessors, (658), 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 16:38:17,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:17,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 190 [2023-08-30 16:38:17,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:37,087 INFO L130 PetriNetUnfolder]: 40571/59568 cut-off events. [2023-08-30 16:38:37,088 INFO L131 PetriNetUnfolder]: For 1872451/1873931 co-relation queries the response was YES. [2023-08-30 16:38:38,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423995 conditions, 59568 events. 40571/59568 cut-off events. For 1872451/1873931 co-relation queries the response was YES. Maximal size of possible extension queue 3581. Compared 482266 event pairs, 2873 based on Foata normal form. 804/60048 useless extension candidates. Maximal degree in co-relation 423862. Up to 34306 conditions per place. [2023-08-30 16:38:38,890 INFO L137 encePairwiseOnDemand]: 175/190 looper letters, 732 selfloop transitions, 744 changer transitions 0/1493 dead transitions. [2023-08-30 16:38:38,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1493 transitions, 35830 flow [2023-08-30 16:38:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 16:38:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 16:38:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1732 transitions. [2023-08-30 16:38:38,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43408521303258146 [2023-08-30 16:38:38,893 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1732 transitions. [2023-08-30 16:38:38,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1732 transitions. [2023-08-30 16:38:38,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:38,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1732 transitions. [2023-08-30 16:38:38,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 82.47619047619048) internal successors, (1732), 21 states have internal predecessors, (1732), 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 16:38:38,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 190.0) internal successors, (4180), 22 states have internal predecessors, (4180), 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 16:38:38,898 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 190.0) internal successors, (4180), 22 states have internal predecessors, (4180), 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 16:38:38,899 INFO L175 Difference]: Start difference. First operand has 337 places, 1203 transitions, 28721 flow. Second operand 21 states and 1732 transitions. [2023-08-30 16:38:38,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1493 transitions, 35830 flow [2023-08-30 16:38:59,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1493 transitions, 34969 flow, removed 259 selfloop flow, removed 11 redundant places. [2023-08-30 16:38:59,413 INFO L231 Difference]: Finished difference. Result has 355 places, 1291 transitions, 33125 flow [2023-08-30 16:38:59,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=27888, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=657, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=33125, PETRI_PLACES=355, PETRI_TRANSITIONS=1291} [2023-08-30 16:38:59,415 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 308 predicate places. [2023-08-30 16:38:59,415 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 1291 transitions, 33125 flow [2023-08-30 16:38:59,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 73.11111111111111) internal successors, (658), 9 states have internal predecessors, (658), 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 16:38:59,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:59,416 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] [2023-08-30 16:38:59,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 16:38:59,416 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:38:59,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:59,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1446371134, now seen corresponding path program 2 times [2023-08-30 16:38:59,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:59,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606455362] [2023-08-30 16:38:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:59,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:38:59,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:59,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606455362] [2023-08-30 16:38:59,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606455362] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:38:59,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518570381] [2023-08-30 16:38:59,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:38:59,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:38:59,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:38:59,509 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 16:38:59,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process