./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/45_monabsex1_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 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 23:03:09,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 23:03:09,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 23:03:09,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 23:03:09,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 23:03:09,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 23:03:09,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 23:03:09,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 23:03:09,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 23:03:09,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 23:03:09,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 23:03:09,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 23:03:09,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 23:03:09,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 23:03:09,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 23:03:09,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 23:03:09,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 23:03:09,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 23:03:09,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 23:03:09,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 23:03:09,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 23:03:09,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 23:03:09,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 23:03:09,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 23:03:09,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 23:03:09,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 23:03:09,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 23:03:09,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 23:03:09,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 23:03:09,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 23:03:09,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 23:03:09,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 23:03:09,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 23:03:09,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 23:03:09,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 23:03:09,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 23:03:09,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 23:03:09,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 23:03:09,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 23:03:09,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 23:03:09,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 23:03:09,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 23:03:09,959 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 23:03:09,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 23:03:09,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 23:03:09,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 23:03:09,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 23:03:09,962 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 23:03:09,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 23:03:09,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 23:03:09,963 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 23:03:09,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 23:03:09,964 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 23:03:09,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 23:03:09,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 23:03:09,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 23:03:09,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 23:03:09,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 23:03:09,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 23:03:09,965 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 23:03:09,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 23:03:09,966 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 23:03:09,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 23:03:09,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 23:03:09,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 23:03:09,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 23:03:09,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:03:09,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 23:03:09,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 23:03:09,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 23:03:09,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 23:03:09,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 23:03:09,968 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 23:03:09,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 23:03:09,968 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 23:03:09,968 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 23:03:09,969 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 23:03:09,969 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 23:03:10,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 23:03:10,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 23:03:10,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 23:03:10,329 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 23:03:10,330 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 23:03:10,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2023-08-30 23:03:11,452 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 23:03:11,710 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 23:03:11,711 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2023-08-30 23:03:11,727 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecfe722b2/cf3fe3d4165c4883b2867faa80e029f2/FLAG3feef7d0e [2023-08-30 23:03:11,750 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecfe722b2/cf3fe3d4165c4883b2867faa80e029f2 [2023-08-30 23:03:11,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 23:03:11,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 23:03:11,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 23:03:11,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 23:03:11,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 23:03:11,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:03:11" (1/1) ... [2023-08-30 23:03:11,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@339f824a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:11, skipping insertion in model container [2023-08-30 23:03:11,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:03:11" (1/1) ... [2023-08-30 23:03:11,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 23:03:11,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 23:03:12,000 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 23:03:12,135 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/45_monabsex1_vs.i[30633,30646] [2023-08-30 23:03:12,144 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:03:12,154 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 23:03:12,176 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 23:03:12,197 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/45_monabsex1_vs.i[30633,30646] [2023-08-30 23:03:12,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:03:12,245 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:03:12,245 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:03:12,245 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:03:12,252 INFO L208 MainTranslator]: Completed translation [2023-08-30 23:03:12,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:12 WrapperNode [2023-08-30 23:03:12,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 23:03:12,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 23:03:12,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 23:03:12,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 23:03:12,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:12" (1/1) ... [2023-08-30 23:03:12,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:12" (1/1) ... [2023-08-30 23:03:12,316 INFO L138 Inliner]: procedures = 171, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2023-08-30 23:03:12,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 23:03:12,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 23:03:12,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 23:03:12,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 23:03:12,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:12" (1/1) ... [2023-08-30 23:03:12,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:12" (1/1) ... [2023-08-30 23:03:12,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:12" (1/1) ... [2023-08-30 23:03:12,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:12" (1/1) ... [2023-08-30 23:03:12,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:12" (1/1) ... [2023-08-30 23:03:12,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:12" (1/1) ... [2023-08-30 23:03:12,340 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:12" (1/1) ... [2023-08-30 23:03:12,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:12" (1/1) ... [2023-08-30 23:03:12,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 23:03:12,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 23:03:12,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 23:03:12,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 23:03:12,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:12" (1/1) ... [2023-08-30 23:03:12,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:03:12,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:03:12,381 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 23:03:12,394 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 23:03:12,419 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 23:03:12,419 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 23:03:12,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 23:03:12,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 23:03:12,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 23:03:12,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 23:03:12,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 23:03:12,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 23:03:12,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 23:03:12,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 23:03:12,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 23:03:12,421 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 23:03:12,522 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 23:03:12,524 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 23:03:12,649 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 23:03:12,662 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 23:03:12,663 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 23:03:12,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:03:12 BoogieIcfgContainer [2023-08-30 23:03:12,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 23:03:12,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 23:03:12,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 23:03:12,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 23:03:12,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:03:11" (1/3) ... [2023-08-30 23:03:12,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156dd4bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:03:12, skipping insertion in model container [2023-08-30 23:03:12,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:03:12" (2/3) ... [2023-08-30 23:03:12,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156dd4bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:03:12, skipping insertion in model container [2023-08-30 23:03:12,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:03:12" (3/3) ... [2023-08-30 23:03:12,672 INFO L112 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2023-08-30 23:03:12,679 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 23:03:12,687 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 23:03:12,688 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 23:03:12,689 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 23:03:12,734 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:12,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 40 transitions, 85 flow [2023-08-30 23:03:12,802 INFO L130 PetriNetUnfolder]: 2/50 cut-off events. [2023-08-30 23:03:12,803 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:12,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 2/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-08-30 23:03:12,807 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 40 transitions, 85 flow [2023-08-30 23:03:12,810 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 85 flow [2023-08-30 23:03:12,813 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:12,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 42 places, 40 transitions, 85 flow [2023-08-30 23:03:12,823 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 42 places, 40 transitions, 85 flow [2023-08-30 23:03:12,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 40 transitions, 85 flow [2023-08-30 23:03:12,834 INFO L130 PetriNetUnfolder]: 2/50 cut-off events. [2023-08-30 23:03:12,835 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:12,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 2/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-08-30 23:03:12,836 INFO L119 LiptonReduction]: Number of co-enabled transitions 286 [2023-08-30 23:03:13,737 INFO L134 LiptonReduction]: Checked pairs total: 243 [2023-08-30 23:03:13,737 INFO L136 LiptonReduction]: Total number of compositions: 37 [2023-08-30 23:03:13,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:13,762 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;@739e621, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:13,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 23:03:13,767 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 23:03:13,767 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:13,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:13,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 23:03:13,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 23:03:13,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash 5500569, now seen corresponding path program 1 times [2023-08-30 23:03:13,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:13,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623739635] [2023-08-30 23:03:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:13,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:13,954 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 23:03:13,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:13,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623739635] [2023-08-30 23:03:13,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623739635] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:13,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:13,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:03:13,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100487964] [2023-08-30 23:03:13,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:13,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 23:03:13,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:13,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 23:03:13,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 23:03:13,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 77 [2023-08-30 23:03:13,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 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 23:03:13,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:13,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 77 [2023-08-30 23:03:13,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:14,005 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 23:03:14,006 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:14,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-08-30 23:03:14,007 INFO L137 encePairwiseOnDemand]: 75/77 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-08-30 23:03:14,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-30 23:03:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 23:03:14,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 23:03:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 77 transitions. [2023-08-30 23:03:14,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 23:03:14,018 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 77 transitions. [2023-08-30 23:03:14,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 77 transitions. [2023-08-30 23:03:14,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:14,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 77 transitions. [2023-08-30 23:03:14,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 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 23:03:14,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 23:03:14,027 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 23:03:14,029 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 77 transitions. [2023-08-30 23:03:14,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-30 23:03:14,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:14,032 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-08-30 23:03:14,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-08-30 23:03:14,037 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-08-30 23:03:14,037 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-08-30 23:03:14,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 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 23:03:14,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:14,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 23:03:14,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 23:03:14,038 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 23:03:14,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:14,039 INFO L85 PathProgramCache]: Analyzing trace with hash 991068589, now seen corresponding path program 1 times [2023-08-30 23:03:14,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:14,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922147259] [2023-08-30 23:03:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:14,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:14,058 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:03:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:14,083 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:03:14,084 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:03:14,085 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-30 23:03:14,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 23:03:14,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 23:03:14,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 23:03:14,087 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 23:03:14,089 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:03:14,089 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 23:03:14,103 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:14,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 52 transitions, 116 flow [2023-08-30 23:03:14,117 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2023-08-30 23:03:14,117 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:03:14,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 74 events. 3/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-30 23:03:14,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 52 transitions, 116 flow [2023-08-30 23:03:14,119 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 52 transitions, 116 flow [2023-08-30 23:03:14,120 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:14,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 56 places, 52 transitions, 116 flow [2023-08-30 23:03:14,120 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 56 places, 52 transitions, 116 flow [2023-08-30 23:03:14,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 52 transitions, 116 flow [2023-08-30 23:03:14,130 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2023-08-30 23:03:14,130 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:03:14,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 74 events. 3/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-30 23:03:14,132 INFO L119 LiptonReduction]: Number of co-enabled transitions 836 [2023-08-30 23:03:15,075 INFO L134 LiptonReduction]: Checked pairs total: 1109 [2023-08-30 23:03:15,075 INFO L136 LiptonReduction]: Total number of compositions: 39 [2023-08-30 23:03:15,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:15,083 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;@739e621, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:15,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 23:03:15,088 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-08-30 23:03:15,089 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:15,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:15,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 23:03:15,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 23:03:15,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:15,090 INFO L85 PathProgramCache]: Analyzing trace with hash 269791410, now seen corresponding path program 1 times [2023-08-30 23:03:15,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:15,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740076690] [2023-08-30 23:03:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:15,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:15,138 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 23:03:15,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:15,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740076690] [2023-08-30 23:03:15,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740076690] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:15,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:15,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:15,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353629058] [2023-08-30 23:03:15,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:15,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:15,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:15,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:15,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:15,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-08-30 23:03:15,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 23:03:15,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:15,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-08-30 23:03:15,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:15,182 INFO L130 PetriNetUnfolder]: 42/97 cut-off events. [2023-08-30 23:03:15,183 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 23:03:15,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 97 events. 42/97 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 409 event pairs, 16 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 160. Up to 47 conditions per place. [2023-08-30 23:03:15,184 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 13 selfloop transitions, 3 changer transitions 0/19 dead transitions. [2023-08-30 23:03:15,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 87 flow [2023-08-30 23:03:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:15,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-08-30 23:03:15,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-08-30 23:03:15,192 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-08-30 23:03:15,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-08-30 23:03:15,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:15,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-08-30 23:03:15,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 23:03:15,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 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 23:03:15,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 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 23:03:15,198 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 40 flow. Second operand 3 states and 133 transitions. [2023-08-30 23:03:15,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 87 flow [2023-08-30 23:03:15,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 85 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:15,199 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 58 flow [2023-08-30 23:03:15,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-30 23:03:15,200 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2023-08-30 23:03:15,200 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 58 flow [2023-08-30 23:03:15,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 23:03:15,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:15,201 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:15,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 23:03:15,201 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 23:03:15,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:15,202 INFO L85 PathProgramCache]: Analyzing trace with hash 859269627, now seen corresponding path program 1 times [2023-08-30 23:03:15,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:15,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398904147] [2023-08-30 23:03:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:15,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:15,294 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 23:03:15,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:15,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398904147] [2023-08-30 23:03:15,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398904147] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:15,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:15,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:15,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423352564] [2023-08-30 23:03:15,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:15,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:15,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:15,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-08-30 23:03:15,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 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 23:03:15,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:15,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-08-30 23:03:15,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:15,350 INFO L130 PetriNetUnfolder]: 33/92 cut-off events. [2023-08-30 23:03:15,350 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 23:03:15,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 92 events. 33/92 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 387 event pairs, 18 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 98. Up to 41 conditions per place. [2023-08-30 23:03:15,352 INFO L137 encePairwiseOnDemand]: 87/91 looper letters, 12 selfloop transitions, 4 changer transitions 0/19 dead transitions. [2023-08-30 23:03:15,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 104 flow [2023-08-30 23:03:15,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-08-30 23:03:15,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2023-08-30 23:03:15,357 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-08-30 23:03:15,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-08-30 23:03:15,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:15,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-08-30 23:03:15,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 23:03:15,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 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 23:03:15,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 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 23:03:15,362 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 58 flow. Second operand 3 states and 129 transitions. [2023-08-30 23:03:15,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 104 flow [2023-08-30 23:03:15,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 96 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:15,367 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 80 flow [2023-08-30 23:03:15,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-08-30 23:03:15,368 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2023-08-30 23:03:15,369 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 80 flow [2023-08-30 23:03:15,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 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 23:03:15,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:15,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:15,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 23:03:15,370 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 23:03:15,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:15,370 INFO L85 PathProgramCache]: Analyzing trace with hash 868592532, now seen corresponding path program 1 times [2023-08-30 23:03:15,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:15,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386774432] [2023-08-30 23:03:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:15,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 23:03:15,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:15,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386774432] [2023-08-30 23:03:15,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386774432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:15,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:15,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:15,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166381517] [2023-08-30 23:03:15,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:15,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:15,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:15,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:15,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:15,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-08-30 23:03:15,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 23:03:15,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:15,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-08-30 23:03:15,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:15,501 INFO L130 PetriNetUnfolder]: 29/78 cut-off events. [2023-08-30 23:03:15,501 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-30 23:03:15,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 78 events. 29/78 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 304 event pairs, 6 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 192. Up to 61 conditions per place. [2023-08-30 23:03:15,502 INFO L137 encePairwiseOnDemand]: 89/91 looper letters, 14 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-30 23:03:15,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 121 flow [2023-08-30 23:03:15,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-08-30 23:03:15,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46886446886446886 [2023-08-30 23:03:15,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-08-30 23:03:15,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-08-30 23:03:15,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:15,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-08-30 23:03:15,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 23:03:15,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 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 23:03:15,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 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 23:03:15,506 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 80 flow. Second operand 3 states and 128 transitions. [2023-08-30 23:03:15,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 121 flow [2023-08-30 23:03:15,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 113 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:15,508 INFO L231 Difference]: Finished difference. Result has 23 places, 16 transitions, 72 flow [2023-08-30 23:03:15,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2023-08-30 23:03:15,509 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-08-30 23:03:15,509 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 72 flow [2023-08-30 23:03:15,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 23:03:15,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:15,510 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:15,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 23:03:15,510 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 23:03:15,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:15,511 INFO L85 PathProgramCache]: Analyzing trace with hash 867556501, now seen corresponding path program 1 times [2023-08-30 23:03:15,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:15,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459362774] [2023-08-30 23:03:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:15,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:15,598 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 23:03:15,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:15,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459362774] [2023-08-30 23:03:15,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459362774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:15,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:15,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:15,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455307951] [2023-08-30 23:03:15,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:15,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:15,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:15,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:15,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:15,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-08-30 23:03:15,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 23:03:15,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:15,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-08-30 23:03:15,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:15,661 INFO L130 PetriNetUnfolder]: 25/76 cut-off events. [2023-08-30 23:03:15,661 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2023-08-30 23:03:15,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 76 events. 25/76 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 303 event pairs, 8 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 94. Up to 45 conditions per place. [2023-08-30 23:03:15,662 INFO L137 encePairwiseOnDemand]: 89/91 looper letters, 12 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2023-08-30 23:03:15,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 17 transitions, 102 flow [2023-08-30 23:03:15,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-08-30 23:03:15,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2023-08-30 23:03:15,664 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-08-30 23:03:15,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-08-30 23:03:15,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:15,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-08-30 23:03:15,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 23:03:15,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 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 23:03:15,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 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 23:03:15,666 INFO L175 Difference]: Start difference. First operand has 23 places, 16 transitions, 72 flow. Second operand 3 states and 126 transitions. [2023-08-30 23:03:15,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 17 transitions, 102 flow [2023-08-30 23:03:15,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 17 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:15,667 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 70 flow [2023-08-30 23:03:15,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-30 23:03:15,668 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-08-30 23:03:15,668 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 70 flow [2023-08-30 23:03:15,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 23:03:15,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:15,669 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 23:03:15,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 23:03:15,669 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 23:03:15,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:15,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1122441926, now seen corresponding path program 1 times [2023-08-30 23:03:15,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:15,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282216347] [2023-08-30 23:03:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:15,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:15,679 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:03:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:15,688 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:03:15,689 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:03:15,689 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-30 23:03:15,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 23:03:15,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 23:03:15,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 23:03:15,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 23:03:15,690 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 23:03:15,690 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:03:15,690 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 23:03:15,702 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:15,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2023-08-30 23:03:15,712 INFO L130 PetriNetUnfolder]: 4/98 cut-off events. [2023-08-30 23:03:15,713 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 23:03:15,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 4/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 149 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 78. Up to 8 conditions per place. [2023-08-30 23:03:15,713 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 64 transitions, 149 flow [2023-08-30 23:03:15,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 64 transitions, 149 flow [2023-08-30 23:03:15,714 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:15,714 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 64 transitions, 149 flow [2023-08-30 23:03:15,714 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 64 transitions, 149 flow [2023-08-30 23:03:15,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2023-08-30 23:03:15,734 INFO L130 PetriNetUnfolder]: 4/98 cut-off events. [2023-08-30 23:03:15,734 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 23:03:15,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 4/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 149 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 78. Up to 8 conditions per place. [2023-08-30 23:03:15,736 INFO L119 LiptonReduction]: Number of co-enabled transitions 1650 [2023-08-30 23:03:16,767 INFO L134 LiptonReduction]: Checked pairs total: 2465 [2023-08-30 23:03:16,767 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-08-30 23:03:16,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:16,769 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;@739e621, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:16,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 23:03:16,771 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-08-30 23:03:16,771 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:16,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:16,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 23:03:16,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:03:16,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:16,771 INFO L85 PathProgramCache]: Analyzing trace with hash 387072883, now seen corresponding path program 1 times [2023-08-30 23:03:16,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:16,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296483021] [2023-08-30 23:03:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:16,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:16,806 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 23:03:16,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:16,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296483021] [2023-08-30 23:03:16,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296483021] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:16,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:16,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:16,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530827984] [2023-08-30 23:03:16,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:16,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:16,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:16,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:16,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:16,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-30 23:03:16,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 23:03:16,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:16,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-30 23:03:16,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:16,896 INFO L130 PetriNetUnfolder]: 370/649 cut-off events. [2023-08-30 23:03:16,896 INFO L131 PetriNetUnfolder]: For 169/169 co-relation queries the response was YES. [2023-08-30 23:03:16,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 649 events. 370/649 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3493 event pairs, 180 based on Foata normal form. 0/500 useless extension candidates. Maximal degree in co-relation 328. Up to 363 conditions per place. [2023-08-30 23:03:16,901 INFO L137 encePairwiseOnDemand]: 105/111 looper letters, 20 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-08-30 23:03:16,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 135 flow [2023-08-30 23:03:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-08-30 23:03:16,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2023-08-30 23:03:16,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-08-30 23:03:16,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-08-30 23:03:16,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:16,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-08-30 23:03:16,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 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 23:03:16,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 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 23:03:16,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 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 23:03:16,924 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 57 flow. Second operand 3 states and 165 transitions. [2023-08-30 23:03:16,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 135 flow [2023-08-30 23:03:16,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 127 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:16,925 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 79 flow [2023-08-30 23:03:16,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-30 23:03:16,926 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-08-30 23:03:16,926 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 79 flow [2023-08-30 23:03:16,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 23:03:16,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:16,927 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:16,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 23:03:16,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:03:16,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1708330831, now seen corresponding path program 1 times [2023-08-30 23:03:16,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:16,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310687595] [2023-08-30 23:03:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:16,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:16,948 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 23:03:16,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:16,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310687595] [2023-08-30 23:03:16,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310687595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:16,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:16,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:16,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772828146] [2023-08-30 23:03:16,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:16,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:16,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:16,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:16,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-30 23:03:16,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 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 23:03:16,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:16,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-30 23:03:16,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:17,033 INFO L130 PetriNetUnfolder]: 432/765 cut-off events. [2023-08-30 23:03:17,033 INFO L131 PetriNetUnfolder]: For 445/445 co-relation queries the response was YES. [2023-08-30 23:03:17,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 765 events. 432/765 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 4381 event pairs, 182 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 950. Up to 429 conditions per place. [2023-08-30 23:03:17,039 INFO L137 encePairwiseOnDemand]: 106/111 looper letters, 22 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2023-08-30 23:03:17,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 180 flow [2023-08-30 23:03:17,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:17,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-08-30 23:03:17,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2023-08-30 23:03:17,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-08-30 23:03:17,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-08-30 23:03:17,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:17,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-08-30 23:03:17,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 23:03:17,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 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 23:03:17,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 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 23:03:17,043 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 79 flow. Second operand 3 states and 162 transitions. [2023-08-30 23:03:17,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 180 flow [2023-08-30 23:03:17,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:17,046 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 119 flow [2023-08-30 23:03:17,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-08-30 23:03:17,047 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-08-30 23:03:17,047 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 119 flow [2023-08-30 23:03:17,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 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 23:03:17,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:17,047 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:17,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 23:03:17,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:03:17,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:17,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1419948381, now seen corresponding path program 1 times [2023-08-30 23:03:17,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:17,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274735591] [2023-08-30 23:03:17,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:17,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 23:03:17,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:17,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274735591] [2023-08-30 23:03:17,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274735591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:17,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:17,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:17,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884032697] [2023-08-30 23:03:17,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:17,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:17,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:17,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:17,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:17,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-30 23:03:17,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 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 23:03:17,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:17,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-30 23:03:17,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:17,169 INFO L130 PetriNetUnfolder]: 352/619 cut-off events. [2023-08-30 23:03:17,170 INFO L131 PetriNetUnfolder]: For 556/556 co-relation queries the response was YES. [2023-08-30 23:03:17,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1887 conditions, 619 events. 352/619 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3525 event pairs, 64 based on Foata normal form. 0/557 useless extension candidates. Maximal degree in co-relation 1834. Up to 512 conditions per place. [2023-08-30 23:03:17,175 INFO L137 encePairwiseOnDemand]: 109/111 looper letters, 28 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-30 23:03:17,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 225 flow [2023-08-30 23:03:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:17,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-08-30 23:03:17,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48348348348348347 [2023-08-30 23:03:17,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-08-30 23:03:17,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-08-30 23:03:17,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:17,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-08-30 23:03:17,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 23:03:17,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 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 23:03:17,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 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 23:03:17,178 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 119 flow. Second operand 3 states and 161 transitions. [2023-08-30 23:03:17,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 225 flow [2023-08-30 23:03:17,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:17,181 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 107 flow [2023-08-30 23:03:17,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-30 23:03:17,182 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-30 23:03:17,182 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 107 flow [2023-08-30 23:03:17,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 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 23:03:17,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:17,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:17,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 23:03:17,183 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:03:17,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:17,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1418650112, now seen corresponding path program 1 times [2023-08-30 23:03:17,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:17,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673997989] [2023-08-30 23:03:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:17,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:17,216 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 23:03:17,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:17,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673997989] [2023-08-30 23:03:17,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673997989] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:17,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:17,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:17,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129657229] [2023-08-30 23:03:17,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:17,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:17,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:17,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:17,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:17,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-30 23:03:17,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 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 23:03:17,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:17,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-30 23:03:17,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:17,300 INFO L130 PetriNetUnfolder]: 285/518 cut-off events. [2023-08-30 23:03:17,301 INFO L131 PetriNetUnfolder]: For 392/392 co-relation queries the response was YES. [2023-08-30 23:03:17,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 518 events. 285/518 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 2833 event pairs, 51 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 778. Up to 412 conditions per place. [2023-08-30 23:03:17,304 INFO L137 encePairwiseOnDemand]: 109/111 looper letters, 25 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-30 23:03:17,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 192 flow [2023-08-30 23:03:17,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2023-08-30 23:03:17,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744744744744745 [2023-08-30 23:03:17,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2023-08-30 23:03:17,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2023-08-30 23:03:17,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:17,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2023-08-30 23:03:17,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 23:03:17,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 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 23:03:17,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 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 23:03:17,308 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 107 flow. Second operand 3 states and 158 transitions. [2023-08-30 23:03:17,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 192 flow [2023-08-30 23:03:17,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:17,309 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 105 flow [2023-08-30 23:03:17,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2023-08-30 23:03:17,310 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-30 23:03:17,310 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 105 flow [2023-08-30 23:03:17,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 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 23:03:17,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:17,311 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:17,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 23:03:17,311 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:03:17,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:17,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1905498328, now seen corresponding path program 1 times [2023-08-30 23:03:17,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:17,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812915129] [2023-08-30 23:03:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:17,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:03:17,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:17,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812915129] [2023-08-30 23:03:17,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812915129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:17,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:17,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:17,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163053861] [2023-08-30 23:03:17,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:17,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:17,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:17,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:17,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:17,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-30 23:03:17,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 23:03:17,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:17,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-30 23:03:17,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:17,406 INFO L130 PetriNetUnfolder]: 284/582 cut-off events. [2023-08-30 23:03:17,407 INFO L131 PetriNetUnfolder]: For 470/470 co-relation queries the response was YES. [2023-08-30 23:03:17,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1687 conditions, 582 events. 284/582 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3503 event pairs, 140 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 904. Up to 341 conditions per place. [2023-08-30 23:03:17,411 INFO L137 encePairwiseOnDemand]: 106/111 looper letters, 20 selfloop transitions, 9 changer transitions 0/32 dead transitions. [2023-08-30 23:03:17,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 213 flow [2023-08-30 23:03:17,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-08-30 23:03:17,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47147147147147145 [2023-08-30 23:03:17,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-08-30 23:03:17,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-08-30 23:03:17,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:17,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-08-30 23:03:17,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 23:03:17,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 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 23:03:17,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 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 23:03:17,415 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 105 flow. Second operand 3 states and 157 transitions. [2023-08-30 23:03:17,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 213 flow [2023-08-30 23:03:17,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:17,417 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 181 flow [2023-08-30 23:03:17,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-30 23:03:17,418 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2023-08-30 23:03:17,418 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 181 flow [2023-08-30 23:03:17,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 23:03:17,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:17,418 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:17,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 23:03:17,419 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:03:17,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:17,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1059096539, now seen corresponding path program 1 times [2023-08-30 23:03:17,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:17,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908215019] [2023-08-30 23:03:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:17,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:03:17,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:17,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908215019] [2023-08-30 23:03:17,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908215019] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:17,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:17,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:17,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445433751] [2023-08-30 23:03:17,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:17,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:17,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:17,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:17,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:17,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-30 23:03:17,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 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 23:03:17,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:17,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-30 23:03:17,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:17,523 INFO L130 PetriNetUnfolder]: 237/505 cut-off events. [2023-08-30 23:03:17,523 INFO L131 PetriNetUnfolder]: For 763/763 co-relation queries the response was YES. [2023-08-30 23:03:17,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 505 events. 237/505 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3005 event pairs, 79 based on Foata normal form. 30/531 useless extension candidates. Maximal degree in co-relation 924. Up to 316 conditions per place. [2023-08-30 23:03:17,527 INFO L137 encePairwiseOnDemand]: 109/111 looper letters, 26 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2023-08-30 23:03:17,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 273 flow [2023-08-30 23:03:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-08-30 23:03:17,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46546546546546547 [2023-08-30 23:03:17,529 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-08-30 23:03:17,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-08-30 23:03:17,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:17,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-08-30 23:03:17,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 23:03:17,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 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 23:03:17,530 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 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 23:03:17,531 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 181 flow. Second operand 3 states and 155 transitions. [2023-08-30 23:03:17,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 273 flow [2023-08-30 23:03:17,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 255 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:17,533 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 167 flow [2023-08-30 23:03:17,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-30 23:03:17,534 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2023-08-30 23:03:17,534 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 167 flow [2023-08-30 23:03:17,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 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 23:03:17,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:17,534 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 23:03:17,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 23:03:17,535 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:03:17,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1530336096, now seen corresponding path program 1 times [2023-08-30 23:03:17,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:17,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123059000] [2023-08-30 23:03:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:17,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:17,544 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:03:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:17,553 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:03:17,554 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:03:17,554 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-30 23:03:17,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 23:03:17,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 23:03:17,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 23:03:17,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 23:03:17,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 23:03:17,555 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:17,555 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:03:17,556 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 23:03:17,569 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:17,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 76 transitions, 184 flow [2023-08-30 23:03:17,580 INFO L130 PetriNetUnfolder]: 5/122 cut-off events. [2023-08-30 23:03:17,580 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 23:03:17,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 5/122 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-08-30 23:03:17,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 76 transitions, 184 flow [2023-08-30 23:03:17,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 76 transitions, 184 flow [2023-08-30 23:03:17,582 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:17,582 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 76 transitions, 184 flow [2023-08-30 23:03:17,582 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 76 transitions, 184 flow [2023-08-30 23:03:17,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 76 transitions, 184 flow [2023-08-30 23:03:17,591 INFO L130 PetriNetUnfolder]: 5/122 cut-off events. [2023-08-30 23:03:17,591 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 23:03:17,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 5/122 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-08-30 23:03:17,594 INFO L119 LiptonReduction]: Number of co-enabled transitions 2728 [2023-08-30 23:03:18,662 INFO L134 LiptonReduction]: Checked pairs total: 3813 [2023-08-30 23:03:18,662 INFO L136 LiptonReduction]: Total number of compositions: 55 [2023-08-30 23:03:18,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:18,664 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;@739e621, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:18,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 23:03:18,665 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-08-30 23:03:18,665 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:18,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:18,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 23:03:18,665 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:18,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:18,666 INFO L85 PathProgramCache]: Analyzing trace with hash 522516946, now seen corresponding path program 1 times [2023-08-30 23:03:18,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:18,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754036779] [2023-08-30 23:03:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:18,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:18,701 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 23:03:18,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:18,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754036779] [2023-08-30 23:03:18,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754036779] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:18,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:18,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:18,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047593621] [2023-08-30 23:03:18,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:18,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:18,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:18,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:18,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:18,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 23:03:18,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 23:03:18,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:18,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 23:03:18,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:18,988 INFO L130 PetriNetUnfolder]: 2300/3511 cut-off events. [2023-08-30 23:03:18,989 INFO L131 PetriNetUnfolder]: For 1374/1374 co-relation queries the response was YES. [2023-08-30 23:03:18,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7619 conditions, 3511 events. 2300/3511 cut-off events. For 1374/1374 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 20881 event pairs, 1224 based on Foata normal form. 0/2580 useless extension candidates. Maximal degree in co-relation 1418. Up to 2129 conditions per place. [2023-08-30 23:03:19,013 INFO L137 encePairwiseOnDemand]: 124/131 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-08-30 23:03:19,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 187 flow [2023-08-30 23:03:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:19,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:19,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2023-08-30 23:03:19,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012722646310432 [2023-08-30 23:03:19,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2023-08-30 23:03:19,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2023-08-30 23:03:19,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:19,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2023-08-30 23:03:19,021 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 23:03:19,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:19,022 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:19,022 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 76 flow. Second operand 3 states and 197 transitions. [2023-08-30 23:03:19,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 187 flow [2023-08-30 23:03:19,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 169 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:19,025 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 100 flow [2023-08-30 23:03:19,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-08-30 23:03:19,026 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-08-30 23:03:19,027 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 100 flow [2023-08-30 23:03:19,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 23:03:19,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:19,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:19,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 23:03:19,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:19,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash -61129782, now seen corresponding path program 1 times [2023-08-30 23:03:19,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:19,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200610371] [2023-08-30 23:03:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:19,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:19,047 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 23:03:19,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:19,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200610371] [2023-08-30 23:03:19,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200610371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:19,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:19,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:19,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561667203] [2023-08-30 23:03:19,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:19,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:19,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:19,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:19,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:19,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 23:03:19,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 23:03:19,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:19,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 23:03:19,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:19,482 INFO L130 PetriNetUnfolder]: 3060/4717 cut-off events. [2023-08-30 23:03:19,483 INFO L131 PetriNetUnfolder]: For 2755/2755 co-relation queries the response was YES. [2023-08-30 23:03:19,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12124 conditions, 4717 events. 3060/4717 cut-off events. For 2755/2755 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 30285 event pairs, 1352 based on Foata normal form. 0/3849 useless extension candidates. Maximal degree in co-relation 5760. Up to 2885 conditions per place. [2023-08-30 23:03:19,520 INFO L137 encePairwiseOnDemand]: 125/131 looper letters, 30 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-08-30 23:03:19,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 242 flow [2023-08-30 23:03:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2023-08-30 23:03:19,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49363867684478374 [2023-08-30 23:03:19,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2023-08-30 23:03:19,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2023-08-30 23:03:19,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:19,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2023-08-30 23:03:19,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 23:03:19,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:19,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:19,524 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 100 flow. Second operand 3 states and 194 transitions. [2023-08-30 23:03:19,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 242 flow [2023-08-30 23:03:19,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:19,537 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 158 flow [2023-08-30 23:03:19,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-30 23:03:19,538 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-08-30 23:03:19,538 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 158 flow [2023-08-30 23:03:19,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 23:03:19,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:19,538 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:19,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 23:03:19,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:19,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:19,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1893461327, now seen corresponding path program 1 times [2023-08-30 23:03:19,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:19,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465487434] [2023-08-30 23:03:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:19,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 23:03:19,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:19,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465487434] [2023-08-30 23:03:19,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465487434] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:19,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:19,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:19,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293804018] [2023-08-30 23:03:19,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:19,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:19,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:19,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:19,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:19,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 23:03:19,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 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 23:03:19,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:19,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 23:03:19,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:19,895 INFO L130 PetriNetUnfolder]: 2474/3707 cut-off events. [2023-08-30 23:03:19,895 INFO L131 PetriNetUnfolder]: For 3413/3413 co-relation queries the response was YES. [2023-08-30 23:03:19,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11159 conditions, 3707 events. 2474/3707 cut-off events. For 3413/3413 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 22880 event pairs, 472 based on Foata normal form. 0/3135 useless extension candidates. Maximal degree in co-relation 11105. Up to 3026 conditions per place. [2023-08-30 23:03:19,928 INFO L137 encePairwiseOnDemand]: 129/131 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-30 23:03:19,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 321 flow [2023-08-30 23:03:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:19,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-08-30 23:03:19,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4910941475826972 [2023-08-30 23:03:19,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-08-30 23:03:19,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-08-30 23:03:19,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:19,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-08-30 23:03:19,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 23:03:19,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:19,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:19,933 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 158 flow. Second operand 3 states and 193 transitions. [2023-08-30 23:03:19,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 321 flow [2023-08-30 23:03:19,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:19,947 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 142 flow [2023-08-30 23:03:19,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 23:03:19,948 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-08-30 23:03:19,948 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 142 flow [2023-08-30 23:03:19,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 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 23:03:19,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:19,949 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:19,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 23:03:19,949 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:19,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:19,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1895020926, now seen corresponding path program 1 times [2023-08-30 23:03:19,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:19,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864731873] [2023-08-30 23:03:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:19,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:19,984 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 23:03:19,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:19,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864731873] [2023-08-30 23:03:19,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864731873] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:19,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:19,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:19,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559977864] [2023-08-30 23:03:19,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:19,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:19,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:19,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:19,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:19,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 23:03:19,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 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 23:03:19,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:19,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 23:03:19,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:20,290 INFO L130 PetriNetUnfolder]: 1993/3029 cut-off events. [2023-08-30 23:03:20,291 INFO L131 PetriNetUnfolder]: For 2304/2304 co-relation queries the response was YES. [2023-08-30 23:03:20,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8826 conditions, 3029 events. 1993/3029 cut-off events. For 2304/2304 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 18194 event pairs, 335 based on Foata normal form. 0/2587 useless extension candidates. Maximal degree in co-relation 4399. Up to 2450 conditions per place. [2023-08-30 23:03:20,314 INFO L137 encePairwiseOnDemand]: 129/131 looper letters, 38 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-30 23:03:20,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 282 flow [2023-08-30 23:03:20,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:20,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2023-08-30 23:03:20,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48346055979643765 [2023-08-30 23:03:20,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2023-08-30 23:03:20,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2023-08-30 23:03:20,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:20,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2023-08-30 23:03:20,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 23:03:20,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:20,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:20,318 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 142 flow. Second operand 3 states and 190 transitions. [2023-08-30 23:03:20,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 282 flow [2023-08-30 23:03:20,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:20,320 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 140 flow [2023-08-30 23:03:20,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-30 23:03:20,321 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-08-30 23:03:20,321 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 140 flow [2023-08-30 23:03:20,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 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 23:03:20,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:20,322 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:20,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 23:03:20,322 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:20,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:20,323 INFO L85 PathProgramCache]: Analyzing trace with hash -189575826, now seen corresponding path program 1 times [2023-08-30 23:03:20,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:20,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495592153] [2023-08-30 23:03:20,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:20,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:03:20,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:20,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495592153] [2023-08-30 23:03:20,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495592153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:20,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:20,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:20,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224952114] [2023-08-30 23:03:20,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:20,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:20,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:20,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:20,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:20,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 23:03:20,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 23:03:20,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:20,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 23:03:20,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:20,699 INFO L130 PetriNetUnfolder]: 2430/3913 cut-off events. [2023-08-30 23:03:20,700 INFO L131 PetriNetUnfolder]: For 3547/3547 co-relation queries the response was YES. [2023-08-30 23:03:20,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11283 conditions, 3913 events. 2430/3913 cut-off events. For 3547/3547 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 26090 event pairs, 988 based on Foata normal form. 0/3420 useless extension candidates. Maximal degree in co-relation 6586. Up to 2459 conditions per place. [2023-08-30 23:03:20,731 INFO L137 encePairwiseOnDemand]: 125/131 looper letters, 30 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2023-08-30 23:03:20,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 311 flow [2023-08-30 23:03:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-08-30 23:03:20,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48091603053435117 [2023-08-30 23:03:20,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-08-30 23:03:20,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-08-30 23:03:20,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:20,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-08-30 23:03:20,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 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 23:03:20,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:20,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:20,735 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 140 flow. Second operand 3 states and 189 transitions. [2023-08-30 23:03:20,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 311 flow [2023-08-30 23:03:20,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:20,738 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 264 flow [2023-08-30 23:03:20,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-08-30 23:03:20,739 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2023-08-30 23:03:20,739 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 264 flow [2023-08-30 23:03:20,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 23:03:20,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:20,739 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:20,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 23:03:20,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:20,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:20,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1581880004, now seen corresponding path program 1 times [2023-08-30 23:03:20,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:20,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836287396] [2023-08-30 23:03:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:20,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:03:20,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:20,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836287396] [2023-08-30 23:03:20,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836287396] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:20,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:20,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:20,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973696882] [2023-08-30 23:03:20,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:20,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:20,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:20,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:20,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:20,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 23:03:20,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 23:03:20,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:20,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 23:03:20,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:21,091 INFO L130 PetriNetUnfolder]: 1955/3099 cut-off events. [2023-08-30 23:03:21,092 INFO L131 PetriNetUnfolder]: For 5131/5131 co-relation queries the response was YES. [2023-08-30 23:03:21,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11103 conditions, 3099 events. 1955/3099 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 19739 event pairs, 409 based on Foata normal form. 204/3066 useless extension candidates. Maximal degree in co-relation 6139. Up to 2442 conditions per place. [2023-08-30 23:03:21,116 INFO L137 encePairwiseOnDemand]: 129/131 looper letters, 45 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-30 23:03:21,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 447 flow [2023-08-30 23:03:21,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2023-08-30 23:03:21,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758269720101781 [2023-08-30 23:03:21,118 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 187 transitions. [2023-08-30 23:03:21,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 187 transitions. [2023-08-30 23:03:21,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:21,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 187 transitions. [2023-08-30 23:03:21,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 23:03:21,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:21,120 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:21,121 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 264 flow. Second operand 3 states and 187 transitions. [2023-08-30 23:03:21,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 447 flow [2023-08-30 23:03:21,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 52 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:21,130 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 242 flow [2023-08-30 23:03:21,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-08-30 23:03:21,131 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-08-30 23:03:21,131 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 242 flow [2023-08-30 23:03:21,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 23:03:21,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:21,131 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:21,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 23:03:21,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:21,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:21,132 INFO L85 PathProgramCache]: Analyzing trace with hash -248126422, now seen corresponding path program 1 times [2023-08-30 23:03:21,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:21,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761952020] [2023-08-30 23:03:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:21,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 23:03:21,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:21,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761952020] [2023-08-30 23:03:21,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761952020] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:21,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:21,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:21,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620410806] [2023-08-30 23:03:21,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:21,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:21,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:21,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:21,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:21,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 23:03:21,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 23:03:21,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:21,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 23:03:21,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:21,467 INFO L130 PetriNetUnfolder]: 2132/3676 cut-off events. [2023-08-30 23:03:21,467 INFO L131 PetriNetUnfolder]: For 5429/5429 co-relation queries the response was YES. [2023-08-30 23:03:21,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12139 conditions, 3676 events. 2132/3676 cut-off events. For 5429/5429 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 25943 event pairs, 890 based on Foata normal form. 0/3493 useless extension candidates. Maximal degree in co-relation 6087. Up to 2397 conditions per place. [2023-08-30 23:03:21,497 INFO L137 encePairwiseOnDemand]: 125/131 looper letters, 33 selfloop transitions, 21 changer transitions 0/57 dead transitions. [2023-08-30 23:03:21,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 490 flow [2023-08-30 23:03:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-08-30 23:03:21,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732824427480916 [2023-08-30 23:03:21,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-08-30 23:03:21,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-08-30 23:03:21,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:21,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-08-30 23:03:21,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 23:03:21,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:21,502 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:21,502 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 242 flow. Second operand 3 states and 186 transitions. [2023-08-30 23:03:21,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 490 flow [2023-08-30 23:03:21,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 482 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:21,507 INFO L231 Difference]: Finished difference. Result has 40 places, 50 transitions, 460 flow [2023-08-30 23:03:21,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=460, PETRI_PLACES=40, PETRI_TRANSITIONS=50} [2023-08-30 23:03:21,507 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2023-08-30 23:03:21,507 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 50 transitions, 460 flow [2023-08-30 23:03:21,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 23:03:21,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:21,508 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:21,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 23:03:21,508 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:21,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:21,509 INFO L85 PathProgramCache]: Analyzing trace with hash 898018579, now seen corresponding path program 1 times [2023-08-30 23:03:21,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:21,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059551386] [2023-08-30 23:03:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:21,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 23:03:21,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:21,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059551386] [2023-08-30 23:03:21,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059551386] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:21,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:21,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:21,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063916003] [2023-08-30 23:03:21,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:21,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:21,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:21,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:21,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:21,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 23:03:21,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 50 transitions, 460 flow. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 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 23:03:21,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:21,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 23:03:21,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:21,873 INFO L130 PetriNetUnfolder]: 1771/3145 cut-off events. [2023-08-30 23:03:21,874 INFO L131 PetriNetUnfolder]: For 7685/7685 co-relation queries the response was YES. [2023-08-30 23:03:21,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12210 conditions, 3145 events. 1771/3145 cut-off events. For 7685/7685 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 22274 event pairs, 569 based on Foata normal form. 170/3302 useless extension candidates. Maximal degree in co-relation 6082. Up to 1944 conditions per place. [2023-08-30 23:03:21,902 INFO L137 encePairwiseOnDemand]: 129/131 looper letters, 54 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2023-08-30 23:03:21,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 705 flow [2023-08-30 23:03:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:21,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-08-30 23:03:21,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681933842239186 [2023-08-30 23:03:21,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-08-30 23:03:21,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-08-30 23:03:21,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:21,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-08-30 23:03:21,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 23:03:21,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:21,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 23:03:21,907 INFO L175 Difference]: Start difference. First operand has 40 places, 50 transitions, 460 flow. Second operand 3 states and 184 transitions. [2023-08-30 23:03:21,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 705 flow [2023-08-30 23:03:21,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 663 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:21,919 INFO L231 Difference]: Finished difference. Result has 39 places, 49 transitions, 430 flow [2023-08-30 23:03:21,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=39, PETRI_TRANSITIONS=49} [2023-08-30 23:03:21,920 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2023-08-30 23:03:21,920 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 49 transitions, 430 flow [2023-08-30 23:03:21,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 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 23:03:21,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:21,921 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:21,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 23:03:21,922 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:03:21,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:21,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2065653506, now seen corresponding path program 1 times [2023-08-30 23:03:21,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:21,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934233959] [2023-08-30 23:03:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:21,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:21,934 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:03:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:21,958 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:03:21,959 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:03:21,961 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-30 23:03:21,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-30 23:03:21,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-30 23:03:21,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 23:03:21,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 23:03:21,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 23:03:21,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 23:03:21,962 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:21,963 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:03:21,963 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 23:03:21,985 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:21,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 88 transitions, 221 flow [2023-08-30 23:03:21,999 INFO L130 PetriNetUnfolder]: 6/146 cut-off events. [2023-08-30 23:03:21,999 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 23:03:22,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 146 events. 6/146 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 260 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 135. Up to 12 conditions per place. [2023-08-30 23:03:22,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 88 transitions, 221 flow [2023-08-30 23:03:22,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 88 transitions, 221 flow [2023-08-30 23:03:22,001 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:22,001 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 88 transitions, 221 flow [2023-08-30 23:03:22,001 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 88 transitions, 221 flow [2023-08-30 23:03:22,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 88 transitions, 221 flow [2023-08-30 23:03:22,010 INFO L130 PetriNetUnfolder]: 6/146 cut-off events. [2023-08-30 23:03:22,010 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 23:03:22,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 146 events. 6/146 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 260 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 135. Up to 12 conditions per place. [2023-08-30 23:03:22,014 INFO L119 LiptonReduction]: Number of co-enabled transitions 4070 [2023-08-30 23:03:23,313 INFO L134 LiptonReduction]: Checked pairs total: 5927 [2023-08-30 23:03:23,313 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-08-30 23:03:23,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:23,315 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;@739e621, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:23,315 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 23:03:23,317 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-08-30 23:03:23,317 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:23,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:23,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 23:03:23,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:23,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:23,317 INFO L85 PathProgramCache]: Analyzing trace with hash 678000492, now seen corresponding path program 1 times [2023-08-30 23:03:23,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:23,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475512058] [2023-08-30 23:03:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:23,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:23,337 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 23:03:23,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:23,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475512058] [2023-08-30 23:03:23,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475512058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:23,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:23,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:23,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742426438] [2023-08-30 23:03:23,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:23,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:23,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:23,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:23,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:23,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 23:03:23,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 23:03:23,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:23,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 23:03:23,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:24,498 INFO L130 PetriNetUnfolder]: 12384/17359 cut-off events. [2023-08-30 23:03:24,498 INFO L131 PetriNetUnfolder]: For 8948/8948 co-relation queries the response was YES. [2023-08-30 23:03:24,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37925 conditions, 17359 events. 12384/17359 cut-off events. For 8948/8948 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 107421 event pairs, 6940 based on Foata normal form. 0/12846 useless extension candidates. Maximal degree in co-relation 7783. Up to 11057 conditions per place. [2023-08-30 23:03:24,645 INFO L137 encePairwiseOnDemand]: 143/151 looper letters, 34 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2023-08-30 23:03:24,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 243 flow [2023-08-30 23:03:24,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2023-08-30 23:03:24,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055187637969095 [2023-08-30 23:03:24,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2023-08-30 23:03:24,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2023-08-30 23:03:24,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:24,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2023-08-30 23:03:24,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 23:03:24,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:24,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:24,650 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 97 flow. Second operand 3 states and 229 transitions. [2023-08-30 23:03:24,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 243 flow [2023-08-30 23:03:24,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 211 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:24,662 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 121 flow [2023-08-30 23:03:24,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-30 23:03:24,663 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-08-30 23:03:24,663 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 121 flow [2023-08-30 23:03:24,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 23:03:24,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:24,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:24,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 23:03:24,668 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:24,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:24,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2026213594, now seen corresponding path program 1 times [2023-08-30 23:03:24,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:24,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501064592] [2023-08-30 23:03:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:24,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:24,688 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 23:03:24,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:24,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501064592] [2023-08-30 23:03:24,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501064592] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:24,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:24,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:24,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68873270] [2023-08-30 23:03:24,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:24,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:24,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:24,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:24,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:24,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 23:03:24,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 23:03:24,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:24,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 23:03:24,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:26,530 INFO L130 PetriNetUnfolder]: 17214/24347 cut-off events. [2023-08-30 23:03:26,530 INFO L131 PetriNetUnfolder]: For 13763/13763 co-relation queries the response was YES. [2023-08-30 23:03:26,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62070 conditions, 24347 events. 17214/24347 cut-off events. For 13763/13763 co-relation queries the response was YES. Maximal size of possible extension queue 1703. Compared 161749 event pairs, 8064 based on Foata normal form. 0/19341 useless extension candidates. Maximal degree in co-relation 29432. Up to 15695 conditions per place. [2023-08-30 23:03:26,729 INFO L137 encePairwiseOnDemand]: 144/151 looper letters, 38 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2023-08-30 23:03:26,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 304 flow [2023-08-30 23:03:26,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-08-30 23:03:26,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4988962472406181 [2023-08-30 23:03:26,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-08-30 23:03:26,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-08-30 23:03:26,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:26,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-08-30 23:03:26,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 23:03:26,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:26,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:26,734 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 121 flow. Second operand 3 states and 226 transitions. [2023-08-30 23:03:26,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 304 flow [2023-08-30 23:03:26,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:26,844 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 197 flow [2023-08-30 23:03:26,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-08-30 23:03:26,845 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-08-30 23:03:26,845 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 197 flow [2023-08-30 23:03:26,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 23:03:26,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:26,846 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:26,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 23:03:26,846 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:26,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:26,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1613796839, now seen corresponding path program 1 times [2023-08-30 23:03:26,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:26,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829687360] [2023-08-30 23:03:26,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:26,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 23:03:26,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:26,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829687360] [2023-08-30 23:03:26,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829687360] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:26,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:26,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:26,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530944653] [2023-08-30 23:03:26,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:26,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:26,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:26,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:26,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 23:03:26,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 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 23:03:26,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:26,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 23:03:26,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:28,110 INFO L130 PetriNetUnfolder]: 13946/19127 cut-off events. [2023-08-30 23:03:28,110 INFO L131 PetriNetUnfolder]: For 17220/17220 co-relation queries the response was YES. [2023-08-30 23:03:28,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56975 conditions, 19127 events. 13946/19127 cut-off events. For 17220/17220 co-relation queries the response was YES. Maximal size of possible extension queue 1381. Compared 121192 event pairs, 2700 based on Foata normal form. 0/15793 useless extension candidates. Maximal degree in co-relation 56920. Up to 15496 conditions per place. [2023-08-30 23:03:28,256 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 53 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-30 23:03:28,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 409 flow [2023-08-30 23:03:28,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:28,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-30 23:03:28,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4966887417218543 [2023-08-30 23:03:28,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-30 23:03:28,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-30 23:03:28,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:28,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-30 23:03:28,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 23:03:28,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:28,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:28,261 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 197 flow. Second operand 3 states and 225 transitions. [2023-08-30 23:03:28,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 409 flow [2023-08-30 23:03:28,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 58 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:28,356 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 177 flow [2023-08-30 23:03:28,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-30 23:03:28,356 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-30 23:03:28,357 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 177 flow [2023-08-30 23:03:28,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 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 23:03:28,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:28,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:28,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 23:03:28,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:28,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:28,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1611892188, now seen corresponding path program 1 times [2023-08-30 23:03:28,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:28,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158722591] [2023-08-30 23:03:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:28,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:28,386 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 23:03:28,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:28,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158722591] [2023-08-30 23:03:28,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158722591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:28,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:28,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:28,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150679891] [2023-08-30 23:03:28,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:28,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:28,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:28,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:28,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:28,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 23:03:28,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 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 23:03:28,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:28,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 23:03:28,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:29,364 INFO L130 PetriNetUnfolder]: 11269/15577 cut-off events. [2023-08-30 23:03:29,364 INFO L131 PetriNetUnfolder]: For 11490/11490 co-relation queries the response was YES. [2023-08-30 23:03:29,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44879 conditions, 15577 events. 11269/15577 cut-off events. For 11490/11490 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 96113 event pairs, 1895 based on Foata normal form. 0/12813 useless extension candidates. Maximal degree in co-relation 23207. Up to 12576 conditions per place. [2023-08-30 23:03:29,489 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 50 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-30 23:03:29,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 364 flow [2023-08-30 23:03:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:29,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-30 23:03:29,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4900662251655629 [2023-08-30 23:03:29,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-30 23:03:29,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-30 23:03:29,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:29,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-30 23:03:29,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 23:03:29,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:29,493 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:29,493 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 177 flow. Second operand 3 states and 222 transitions. [2023-08-30 23:03:29,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 364 flow [2023-08-30 23:03:29,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:29,497 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 175 flow [2023-08-30 23:03:29,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-30 23:03:29,498 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-30 23:03:29,498 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 175 flow [2023-08-30 23:03:29,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 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 23:03:29,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:29,498 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:29,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 23:03:29,499 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:29,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:29,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1527139999, now seen corresponding path program 1 times [2023-08-30 23:03:29,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:29,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658476971] [2023-08-30 23:03:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:29,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:03:29,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:29,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658476971] [2023-08-30 23:03:29,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658476971] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:29,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:29,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:29,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859323440] [2023-08-30 23:03:29,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:29,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:29,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:29,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:29,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:29,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 23:03:29,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 23:03:29,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:29,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 23:03:29,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:30,771 INFO L130 PetriNetUnfolder]: 14850/21601 cut-off events. [2023-08-30 23:03:30,771 INFO L131 PetriNetUnfolder]: For 20184/20184 co-relation queries the response was YES. [2023-08-30 23:03:30,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61589 conditions, 21601 events. 14850/21601 cut-off events. For 20184/20184 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 150024 event pairs, 6228 based on Foata normal form. 0/18162 useless extension candidates. Maximal degree in co-relation 35418. Up to 14235 conditions per place. [2023-08-30 23:03:30,981 INFO L137 encePairwiseOnDemand]: 144/151 looper letters, 40 selfloop transitions, 17 changer transitions 0/60 dead transitions. [2023-08-30 23:03:30,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 409 flow [2023-08-30 23:03:30,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:30,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-30 23:03:30,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878587196467991 [2023-08-30 23:03:30,987 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-30 23:03:30,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-30 23:03:30,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:30,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-30 23:03:30,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 23:03:30,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:30,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:30,990 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 175 flow. Second operand 3 states and 221 transitions. [2023-08-30 23:03:30,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 409 flow [2023-08-30 23:03:30,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:30,996 INFO L231 Difference]: Finished difference. Result has 44 places, 49 transitions, 347 flow [2023-08-30 23:03:30,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=44, PETRI_TRANSITIONS=49} [2023-08-30 23:03:30,997 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-08-30 23:03:30,997 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 49 transitions, 347 flow [2023-08-30 23:03:30,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 23:03:30,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:30,997 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:30,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-30 23:03:30,998 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:30,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:30,998 INFO L85 PathProgramCache]: Analyzing trace with hash -96696211, now seen corresponding path program 1 times [2023-08-30 23:03:30,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:30,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360077510] [2023-08-30 23:03:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:30,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:03:31,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:31,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360077510] [2023-08-30 23:03:31,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360077510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:31,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:31,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:31,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890028326] [2023-08-30 23:03:31,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:31,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:31,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:31,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:31,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:31,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 23:03:31,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 347 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 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 23:03:31,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:31,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 23:03:31,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:32,246 INFO L130 PetriNetUnfolder]: 11925/16849 cut-off events. [2023-08-30 23:03:32,247 INFO L131 PetriNetUnfolder]: For 28615/28615 co-relation queries the response was YES. [2023-08-30 23:03:32,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59534 conditions, 16849 events. 11925/16849 cut-off events. For 28615/28615 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 110411 event pairs, 2241 based on Foata normal form. 954/15750 useless extension candidates. Maximal degree in co-relation 33950. Up to 13484 conditions per place. [2023-08-30 23:03:32,410 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 64 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-30 23:03:32,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 71 transitions, 619 flow [2023-08-30 23:03:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-08-30 23:03:32,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48344370860927155 [2023-08-30 23:03:32,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-08-30 23:03:32,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-08-30 23:03:32,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:32,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-08-30 23:03:32,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 23:03:32,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:32,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:32,416 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 347 flow. Second operand 3 states and 219 transitions. [2023-08-30 23:03:32,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 71 transitions, 619 flow [2023-08-30 23:03:32,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 71 transitions, 585 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:32,466 INFO L231 Difference]: Finished difference. Result has 43 places, 48 transitions, 317 flow [2023-08-30 23:03:32,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=43, PETRI_TRANSITIONS=48} [2023-08-30 23:03:32,466 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-08-30 23:03:32,466 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 48 transitions, 317 flow [2023-08-30 23:03:32,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 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 23:03:32,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:32,467 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:32,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-30 23:03:32,467 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:32,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:32,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1896232274, now seen corresponding path program 1 times [2023-08-30 23:03:32,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:32,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50725654] [2023-08-30 23:03:32,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:32,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 23:03:32,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:32,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50725654] [2023-08-30 23:03:32,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50725654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:32,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:32,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:32,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006979814] [2023-08-30 23:03:32,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:32,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:32,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:32,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:32,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:32,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 23:03:32,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 23:03:32,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:32,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 23:03:32,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:33,785 INFO L130 PetriNetUnfolder]: 14852/22111 cut-off events. [2023-08-30 23:03:33,785 INFO L131 PetriNetUnfolder]: For 37417/37417 co-relation queries the response was YES. [2023-08-30 23:03:33,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72697 conditions, 22111 events. 14852/22111 cut-off events. For 37417/37417 co-relation queries the response was YES. Maximal size of possible extension queue 1850. Compared 160692 event pairs, 5610 based on Foata normal form. 0/19811 useless extension candidates. Maximal degree in co-relation 41806. Up to 14769 conditions per place. [2023-08-30 23:03:33,919 INFO L137 encePairwiseOnDemand]: 144/151 looper letters, 47 selfloop transitions, 29 changer transitions 0/79 dead transitions. [2023-08-30 23:03:33,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 79 transitions, 684 flow [2023-08-30 23:03:33,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2023-08-30 23:03:33,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48123620309050774 [2023-08-30 23:03:33,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 218 transitions. [2023-08-30 23:03:33,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 218 transitions. [2023-08-30 23:03:33,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:33,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 218 transitions. [2023-08-30 23:03:33,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 23:03:33,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:33,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:33,923 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 317 flow. Second operand 3 states and 218 transitions. [2023-08-30 23:03:33,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 79 transitions, 684 flow [2023-08-30 23:03:33,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 79 transitions, 676 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:33,938 INFO L231 Difference]: Finished difference. Result has 46 places, 69 transitions, 647 flow [2023-08-30 23:03:33,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=647, PETRI_PLACES=46, PETRI_TRANSITIONS=69} [2023-08-30 23:03:33,939 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-08-30 23:03:33,939 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 69 transitions, 647 flow [2023-08-30 23:03:33,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 23:03:33,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:33,940 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:33,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-30 23:03:33,940 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:33,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:33,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1346338571, now seen corresponding path program 1 times [2023-08-30 23:03:33,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:33,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331668812] [2023-08-30 23:03:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:33,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 23:03:33,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:33,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331668812] [2023-08-30 23:03:33,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331668812] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:33,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:33,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:33,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63422506] [2023-08-30 23:03:33,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:33,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:33,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:33,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:33,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:34,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 23:03:34,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 69 transitions, 647 flow. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 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 23:03:34,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:34,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 23:03:34,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:35,068 INFO L130 PetriNetUnfolder]: 11939/17421 cut-off events. [2023-08-30 23:03:35,069 INFO L131 PetriNetUnfolder]: For 46459/46459 co-relation queries the response was YES. [2023-08-30 23:03:35,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69793 conditions, 17421 events. 11939/17421 cut-off events. For 46459/46459 co-relation queries the response was YES. Maximal size of possible extension queue 1494. Compared 121189 event pairs, 2639 based on Foata normal form. 1012/17369 useless extension candidates. Maximal degree in co-relation 39980. Up to 13486 conditions per place. [2023-08-30 23:03:35,206 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 86 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2023-08-30 23:03:35,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 97 transitions, 1070 flow [2023-08-30 23:03:35,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:35,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:35,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2023-08-30 23:03:35,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4768211920529801 [2023-08-30 23:03:35,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2023-08-30 23:03:35,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2023-08-30 23:03:35,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:35,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2023-08-30 23:03:35,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 23:03:35,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:35,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:35,210 INFO L175 Difference]: Start difference. First operand has 46 places, 69 transitions, 647 flow. Second operand 3 states and 216 transitions. [2023-08-30 23:03:35,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 97 transitions, 1070 flow [2023-08-30 23:03:35,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 97 transitions, 1012 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:35,271 INFO L231 Difference]: Finished difference. Result has 45 places, 68 transitions, 601 flow [2023-08-30 23:03:35,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=601, PETRI_PLACES=45, PETRI_TRANSITIONS=68} [2023-08-30 23:03:35,272 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 8 predicate places. [2023-08-30 23:03:35,272 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 68 transitions, 601 flow [2023-08-30 23:03:35,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 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 23:03:35,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:35,272 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:35,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-30 23:03:35,273 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:35,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:35,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1686687131, now seen corresponding path program 1 times [2023-08-30 23:03:35,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:35,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865816600] [2023-08-30 23:03:35,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:35,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-30 23:03:35,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:35,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865816600] [2023-08-30 23:03:35,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865816600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:35,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:35,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:35,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58171588] [2023-08-30 23:03:35,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:35,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:35,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:35,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:35,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:35,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 23:03:35,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 68 transitions, 601 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 23:03:35,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:35,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 23:03:35,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:36,480 INFO L130 PetriNetUnfolder]: 13634/21204 cut-off events. [2023-08-30 23:03:36,481 INFO L131 PetriNetUnfolder]: For 53657/53657 co-relation queries the response was YES. [2023-08-30 23:03:36,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79175 conditions, 21204 events. 13634/21204 cut-off events. For 53657/53657 co-relation queries the response was YES. Maximal size of possible extension queue 1973. Compared 163535 event pairs, 5130 based on Foata normal form. 0/20302 useless extension candidates. Maximal degree in co-relation 42601. Up to 14771 conditions per place. [2023-08-30 23:03:36,657 INFO L137 encePairwiseOnDemand]: 144/151 looper letters, 58 selfloop transitions, 49 changer transitions 0/110 dead transitions. [2023-08-30 23:03:36,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 110 transitions, 1211 flow [2023-08-30 23:03:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:36,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2023-08-30 23:03:36,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4746136865342163 [2023-08-30 23:03:36,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2023-08-30 23:03:36,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2023-08-30 23:03:36,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:36,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2023-08-30 23:03:36,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 23:03:36,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:36,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:36,661 INFO L175 Difference]: Start difference. First operand has 45 places, 68 transitions, 601 flow. Second operand 3 states and 215 transitions. [2023-08-30 23:03:36,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 110 transitions, 1211 flow [2023-08-30 23:03:36,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 110 transitions, 1195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:03:36,691 INFO L231 Difference]: Finished difference. Result has 48 places, 101 transitions, 1211 flow [2023-08-30 23:03:36,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1211, PETRI_PLACES=48, PETRI_TRANSITIONS=101} [2023-08-30 23:03:36,692 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 11 predicate places. [2023-08-30 23:03:36,692 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 101 transitions, 1211 flow [2023-08-30 23:03:36,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 23:03:36,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:36,692 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:36,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-30 23:03:36,693 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:36,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:36,693 INFO L85 PathProgramCache]: Analyzing trace with hash -747690667, now seen corresponding path program 1 times [2023-08-30 23:03:36,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:36,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155450605] [2023-08-30 23:03:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:36,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-30 23:03:36,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:36,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155450605] [2023-08-30 23:03:36,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155450605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:36,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:36,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:36,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75066900] [2023-08-30 23:03:36,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:36,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:36,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:36,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:36,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:36,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 23:03:36,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 101 transitions, 1211 flow. Second operand has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 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 23:03:36,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:36,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 23:03:36,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:37,800 INFO L130 PetriNetUnfolder]: 11331/18039 cut-off events. [2023-08-30 23:03:37,800 INFO L131 PetriNetUnfolder]: For 68413/68413 co-relation queries the response was YES. [2023-08-30 23:03:37,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77880 conditions, 18039 events. 11331/18039 cut-off events. For 68413/68413 co-relation queries the response was YES. Maximal size of possible extension queue 1637. Compared 140773 event pairs, 3585 based on Foata normal form. 862/18861 useless extension candidates. Maximal degree in co-relation 42009. Up to 10940 conditions per place. [2023-08-30 23:03:37,941 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 118 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2023-08-30 23:03:37,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 137 transitions, 1873 flow [2023-08-30 23:03:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-08-30 23:03:37,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47019867549668876 [2023-08-30 23:03:37,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-08-30 23:03:37,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-08-30 23:03:37,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:37,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-08-30 23:03:37,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 23:03:37,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:37,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 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 23:03:37,944 INFO L175 Difference]: Start difference. First operand has 48 places, 101 transitions, 1211 flow. Second operand 3 states and 213 transitions. [2023-08-30 23:03:37,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 137 transitions, 1873 flow [2023-08-30 23:03:38,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 137 transitions, 1775 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:38,002 INFO L231 Difference]: Finished difference. Result has 47 places, 100 transitions, 1141 flow [2023-08-30 23:03:38,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1141, PETRI_PLACES=47, PETRI_TRANSITIONS=100} [2023-08-30 23:03:38,003 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2023-08-30 23:03:38,003 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 100 transitions, 1141 flow [2023-08-30 23:03:38,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 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 23:03:38,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:38,003 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:38,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-30 23:03:38,004 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:03:38,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:38,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1707278424, now seen corresponding path program 1 times [2023-08-30 23:03:38,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:38,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617250594] [2023-08-30 23:03:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:38,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:38,020 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:03:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:03:38,030 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:03:38,030 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:03:38,031 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 23:03:38,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-30 23:03:38,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-30 23:03:38,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-30 23:03:38,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-30 23:03:38,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-30 23:03:38,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-30 23:03:38,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-30 23:03:38,032 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:38,033 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:03:38,033 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-30 23:03:38,053 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:03:38,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 100 transitions, 260 flow [2023-08-30 23:03:38,065 INFO L130 PetriNetUnfolder]: 7/170 cut-off events. [2023-08-30 23:03:38,066 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 23:03:38,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 170 events. 7/170 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 165. Up to 14 conditions per place. [2023-08-30 23:03:38,067 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 100 transitions, 260 flow [2023-08-30 23:03:38,067 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 100 transitions, 260 flow [2023-08-30 23:03:38,068 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:03:38,068 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 100 transitions, 260 flow [2023-08-30 23:03:38,068 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 100 transitions, 260 flow [2023-08-30 23:03:38,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 100 transitions, 260 flow [2023-08-30 23:03:38,079 INFO L130 PetriNetUnfolder]: 7/170 cut-off events. [2023-08-30 23:03:38,079 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 23:03:38,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 170 events. 7/170 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 165. Up to 14 conditions per place. [2023-08-30 23:03:38,083 INFO L119 LiptonReduction]: Number of co-enabled transitions 5676 [2023-08-30 23:03:39,438 INFO L134 LiptonReduction]: Checked pairs total: 8233 [2023-08-30 23:03:39,438 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-08-30 23:03:39,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:03:39,440 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;@739e621, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:03:39,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 23:03:39,441 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-08-30 23:03:39,441 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:03:39,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:39,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 23:03:39,441 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:03:39,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:39,442 INFO L85 PathProgramCache]: Analyzing trace with hash 853582857, now seen corresponding path program 1 times [2023-08-30 23:03:39,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:39,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202719838] [2023-08-30 23:03:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:39,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:39,458 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 23:03:39,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:39,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202719838] [2023-08-30 23:03:39,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202719838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:39,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:39,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:39,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923025826] [2023-08-30 23:03:39,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:39,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:39,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:39,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:39,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:39,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 23:03:39,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 23:03:39,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:39,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 23:03:39,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:43,735 INFO L130 PetriNetUnfolder]: 62014/82081 cut-off events. [2023-08-30 23:03:43,735 INFO L131 PetriNetUnfolder]: For 52408/52408 co-relation queries the response was YES. [2023-08-30 23:03:43,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180152 conditions, 82081 events. 62014/82081 cut-off events. For 52408/52408 co-relation queries the response was YES. Maximal size of possible extension queue 4290. Compared 525164 event pairs, 35952 based on Foata normal form. 0/59906 useless extension candidates. Maximal degree in co-relation 38661. Up to 54027 conditions per place. [2023-08-30 23:03:44,177 INFO L137 encePairwiseOnDemand]: 162/171 looper letters, 41 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2023-08-30 23:03:44,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 303 flow [2023-08-30 23:03:44,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2023-08-30 23:03:44,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2023-08-30 23:03:44,179 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2023-08-30 23:03:44,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2023-08-30 23:03:44,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:44,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2023-08-30 23:03:44,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 23:03:44,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:03:44,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:03:44,181 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 120 flow. Second operand 3 states and 261 transitions. [2023-08-30 23:03:44,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 303 flow [2023-08-30 23:03:44,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 253 flow, removed 25 selfloop flow, removed 0 redundant places. [2023-08-30 23:03:44,219 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 142 flow [2023-08-30 23:03:44,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2023-08-30 23:03:44,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-08-30 23:03:44,220 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 142 flow [2023-08-30 23:03:44,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 23:03:44,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:44,221 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:44,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-30 23:03:44,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:03:44,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:44,221 INFO L85 PathProgramCache]: Analyzing trace with hash -701240531, now seen corresponding path program 1 times [2023-08-30 23:03:44,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:44,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996220117] [2023-08-30 23:03:44,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:44,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:44,241 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 23:03:44,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:44,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996220117] [2023-08-30 23:03:44,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996220117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:44,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:44,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:03:44,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285394815] [2023-08-30 23:03:44,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:44,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:03:44,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:44,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:03:44,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:03:44,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 23:03:44,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 23:03:44,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:44,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 23:03:44,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:51,159 INFO L130 PetriNetUnfolder]: 87642/116859 cut-off events. [2023-08-30 23:03:51,160 INFO L131 PetriNetUnfolder]: For 63799/63799 co-relation queries the response was YES. [2023-08-30 23:03:51,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296134 conditions, 116859 events. 87642/116859 cut-off events. For 63799/63799 co-relation queries the response was YES. Maximal size of possible extension queue 6344. Compared 797094 event pairs, 43070 based on Foata normal form. 0/90803 useless extension candidates. Maximal degree in co-relation 140390. Up to 77979 conditions per place. [2023-08-30 23:03:51,922 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 46 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2023-08-30 23:03:51,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 366 flow [2023-08-30 23:03:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-08-30 23:03:51,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029239766081871 [2023-08-30 23:03:51,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-08-30 23:03:51,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-08-30 23:03:51,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:51,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-08-30 23:03:51,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 23:03:51,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:03:51,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:03:51,926 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 142 flow. Second operand 3 states and 258 transitions. [2023-08-30 23:03:51,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 366 flow [2023-08-30 23:03:53,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:03:53,388 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 236 flow [2023-08-30 23:03:53,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-08-30 23:03:53,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-08-30 23:03:53,389 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 236 flow [2023-08-30 23:03:53,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 23:03:53,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:03:53,389 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:03:53,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-30 23:03:53,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:03:53,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:03:53,390 INFO L85 PathProgramCache]: Analyzing trace with hash -261541993, now seen corresponding path program 1 times [2023-08-30 23:03:53,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:03:53,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857045298] [2023-08-30 23:03:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:03:53,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:03:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:03:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 23:03:53,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:03:53,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857045298] [2023-08-30 23:03:53,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857045298] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:03:53,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:03:53,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:03:53,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830610621] [2023-08-30 23:03:53,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:03:53,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:03:53,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:03:53,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:03:53,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:03:53,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 23:03:53,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 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 23:03:53,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:03:53,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 23:03:53,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:03:58,627 INFO L130 PetriNetUnfolder]: 71236/92293 cut-off events. [2023-08-30 23:03:58,627 INFO L131 PetriNetUnfolder]: For 80427/80427 co-relation queries the response was YES. [2023-08-30 23:03:58,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272367 conditions, 92293 events. 71236/92293 cut-off events. For 80427/80427 co-relation queries the response was YES. Maximal size of possible extension queue 5175. Compared 592847 event pairs, 13780 based on Foata normal form. 0/74045 useless extension candidates. Maximal degree in co-relation 272311. Up to 74462 conditions per place. [2023-08-30 23:03:59,507 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 65 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-30 23:03:59,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 497 flow [2023-08-30 23:03:59,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:03:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:03:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-30 23:03:59,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5009746588693957 [2023-08-30 23:03:59,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-30 23:03:59,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-30 23:03:59,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:03:59,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-30 23:03:59,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 23:03:59,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:03:59,511 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:03:59,511 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 236 flow. Second operand 3 states and 257 transitions. [2023-08-30 23:03:59,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 497 flow [2023-08-30 23:04:00,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 461 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:04:00,652 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 212 flow [2023-08-30 23:04:00,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-08-30 23:04:00,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-08-30 23:04:00,652 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 212 flow [2023-08-30 23:04:00,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 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 23:04:00,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:00,653 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:04:00,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-30 23:04:00,653 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:04:00,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:00,654 INFO L85 PathProgramCache]: Analyzing trace with hash -263616779, now seen corresponding path program 1 times [2023-08-30 23:04:00,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:00,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886818422] [2023-08-30 23:04:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:00,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:04:00,697 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 23:04:00,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:04:00,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886818422] [2023-08-30 23:04:00,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886818422] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:04:00,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:04:00,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:04:00,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446934850] [2023-08-30 23:04:00,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:04:00,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:04:00,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:04:00,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:04:00,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:04:00,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 23:04:00,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 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 23:04:00,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:04:00,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 23:04:00,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:04:04,784 INFO L130 PetriNetUnfolder]: 57777/75233 cut-off events. [2023-08-30 23:04:04,785 INFO L131 PetriNetUnfolder]: For 53296/53296 co-relation queries the response was YES. [2023-08-30 23:04:05,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214572 conditions, 75233 events. 57777/75233 cut-off events. For 53296/53296 co-relation queries the response was YES. Maximal size of possible extension queue 4281. Compared 473714 event pairs, 9807 based on Foata normal form. 0/60115 useless extension candidates. Maximal degree in co-relation 113375. Up to 60562 conditions per place. [2023-08-30 23:04:05,306 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 62 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-30 23:04:05,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 446 flow [2023-08-30 23:04:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:04:05,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:04:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-08-30 23:04:05,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951267056530214 [2023-08-30 23:04:05,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-08-30 23:04:05,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-08-30 23:04:05,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:04:05,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-08-30 23:04:05,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 23:04:05,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:04:05,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:04:05,309 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 212 flow. Second operand 3 states and 254 transitions. [2023-08-30 23:04:05,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 446 flow [2023-08-30 23:04:05,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:04:05,320 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 210 flow [2023-08-30 23:04:05,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-30 23:04:05,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-08-30 23:04:05,320 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 210 flow [2023-08-30 23:04:05,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 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 23:04:05,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:05,321 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 23:04:05,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-30 23:04:05,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:04:05,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:05,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2120622272, now seen corresponding path program 1 times [2023-08-30 23:04:05,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:05,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699701717] [2023-08-30 23:04:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:05,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:04:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:04:05,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:04:05,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699701717] [2023-08-30 23:04:05,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699701717] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:04:05,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:04:05,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:04:05,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195815836] [2023-08-30 23:04:05,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:04:05,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:04:05,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:04:05,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:04:05,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:04:05,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 23:04:05,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 23:04:05,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:04:05,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 23:04:05,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:04:11,804 INFO L130 PetriNetUnfolder]: 78368/106611 cut-off events. [2023-08-30 23:04:11,804 INFO L131 PetriNetUnfolder]: For 99801/99801 co-relation queries the response was YES. [2023-08-30 23:04:12,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301471 conditions, 106611 events. 78368/106611 cut-off events. For 99801/99801 co-relation queries the response was YES. Maximal size of possible extension queue 6232. Compared 759267 event pairs, 34508 based on Foata normal form. 0/87014 useless extension candidates. Maximal degree in co-relation 167263. Up to 72725 conditions per place. [2023-08-30 23:04:12,643 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 50 selfloop transitions, 21 changer transitions 0/74 dead transitions. [2023-08-30 23:04:12,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 507 flow [2023-08-30 23:04:12,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:04:12,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:04:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-08-30 23:04:12,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49317738791423 [2023-08-30 23:04:12,645 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-08-30 23:04:12,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-08-30 23:04:12,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:04:12,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-08-30 23:04:12,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 23:04:12,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:04:12,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:04:12,648 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 210 flow. Second operand 3 states and 253 transitions. [2023-08-30 23:04:12,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 507 flow [2023-08-30 23:04:12,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 74 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:04:12,670 INFO L231 Difference]: Finished difference. Result has 50 places, 60 transitions, 430 flow [2023-08-30 23:04:12,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=50, PETRI_TRANSITIONS=60} [2023-08-30 23:04:12,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2023-08-30 23:04:12,670 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 60 transitions, 430 flow [2023-08-30 23:04:12,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 23:04:12,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:12,671 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:04:12,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-30 23:04:12,671 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:04:12,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1314784524, now seen corresponding path program 1 times [2023-08-30 23:04:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:12,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623485174] [2023-08-30 23:04:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:12,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:04:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:04:12,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:04:12,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623485174] [2023-08-30 23:04:12,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623485174] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:04:12,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:04:12,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:04:12,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427077889] [2023-08-30 23:04:12,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:04:12,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:04:12,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:04:12,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:04:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:04:12,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 23:04:12,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 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 23:04:12,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:04:12,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 23:04:12,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:04:18,058 INFO L130 PetriNetUnfolder]: 63123/83371 cut-off events. [2023-08-30 23:04:18,058 INFO L131 PetriNetUnfolder]: For 140677/140677 co-relation queries the response was YES. [2023-08-30 23:04:18,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290089 conditions, 83371 events. 63123/83371 cut-off events. For 140677/140677 co-relation queries the response was YES. Maximal size of possible extension queue 5044. Compared 555386 event pairs, 11449 based on Foata normal form. 4008/74526 useless extension candidates. Maximal degree in co-relation 157443. Up to 66634 conditions per place. [2023-08-30 23:04:18,678 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 82 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-08-30 23:04:18,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 89 transitions, 781 flow [2023-08-30 23:04:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:04:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:04:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-08-30 23:04:18,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48927875243664715 [2023-08-30 23:04:18,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-08-30 23:04:18,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-08-30 23:04:18,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:04:18,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-08-30 23:04:18,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 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 23:04:18,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:04:18,681 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:04:18,682 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 430 flow. Second operand 3 states and 251 transitions. [2023-08-30 23:04:18,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 89 transitions, 781 flow [2023-08-30 23:04:18,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 739 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:04:18,984 INFO L231 Difference]: Finished difference. Result has 49 places, 59 transitions, 392 flow [2023-08-30 23:04:18,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=49, PETRI_TRANSITIONS=59} [2023-08-30 23:04:18,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2023-08-30 23:04:18,985 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 59 transitions, 392 flow [2023-08-30 23:04:18,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 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 23:04:18,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:18,985 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:04:18,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-30 23:04:18,986 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:04:18,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:18,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1208238642, now seen corresponding path program 1 times [2023-08-30 23:04:18,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:18,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602703745] [2023-08-30 23:04:18,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:18,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:04:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 23:04:19,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:04:19,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602703745] [2023-08-30 23:04:19,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602703745] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:04:19,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:04:19,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:04:19,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234027693] [2023-08-30 23:04:19,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:04:19,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:04:19,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:04:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:04:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:04:19,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 23:04:19,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 59 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 23:04:19,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:04:19,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 23:04:19,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:04:26,477 INFO L130 PetriNetUnfolder]: 82894/114621 cut-off events. [2023-08-30 23:04:26,478 INFO L131 PetriNetUnfolder]: For 202351/202351 co-relation queries the response was YES. [2023-08-30 23:04:26,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372683 conditions, 114621 events. 82894/114621 cut-off events. For 202351/202351 co-relation queries the response was YES. Maximal size of possible extension queue 7139. Compared 856344 event pairs, 32594 based on Foata normal form. 0/98741 useless extension candidates. Maximal degree in co-relation 216934. Up to 78927 conditions per place. [2023-08-30 23:04:27,353 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 61 selfloop transitions, 37 changer transitions 0/101 dead transitions. [2023-08-30 23:04:27,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 101 transitions, 878 flow [2023-08-30 23:04:27,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:04:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:04:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-08-30 23:04:27,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4873294346978557 [2023-08-30 23:04:27,355 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-08-30 23:04:27,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-08-30 23:04:27,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:04:27,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-08-30 23:04:27,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 23:04:27,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:04:27,356 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:04:27,356 INFO L175 Difference]: Start difference. First operand has 49 places, 59 transitions, 392 flow. Second operand 3 states and 250 transitions. [2023-08-30 23:04:27,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 101 transitions, 878 flow [2023-08-30 23:04:27,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 101 transitions, 870 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:04:27,411 INFO L231 Difference]: Finished difference. Result has 52 places, 88 transitions, 834 flow [2023-08-30 23:04:27,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=834, PETRI_PLACES=52, PETRI_TRANSITIONS=88} [2023-08-30 23:04:27,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2023-08-30 23:04:27,412 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 88 transitions, 834 flow [2023-08-30 23:04:27,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 23:04:27,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:27,412 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:04:27,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-30 23:04:27,412 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:04:27,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:27,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1199311655, now seen corresponding path program 1 times [2023-08-30 23:04:27,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:27,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162885586] [2023-08-30 23:04:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:27,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:04:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 23:04:27,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:04:27,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162885586] [2023-08-30 23:04:27,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162885586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:04:27,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:04:27,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:04:27,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603149939] [2023-08-30 23:04:27,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:04:27,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:04:27,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:04:27,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:04:27,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:04:27,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 23:04:27,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 88 transitions, 834 flow. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 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 23:04:27,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:04:27,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 23:04:27,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:04:33,453 INFO L130 PetriNetUnfolder]: 66491/89377 cut-off events. [2023-08-30 23:04:33,453 INFO L131 PetriNetUnfolder]: For 243725/243725 co-relation queries the response was YES. [2023-08-30 23:04:33,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353392 conditions, 89377 events. 66491/89377 cut-off events. For 243725/243725 co-relation queries the response was YES. Maximal size of possible extension queue 5781. Compared 627164 event pairs, 13367 based on Foata normal form. 4542/84597 useless extension candidates. Maximal degree in co-relation 208656. Up to 70760 conditions per place. [2023-08-30 23:04:34,163 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 117 selfloop transitions, 8 changer transitions 0/128 dead transitions. [2023-08-30 23:04:34,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 128 transitions, 1420 flow [2023-08-30 23:04:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:04:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:04:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-08-30 23:04:34,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834307992202729 [2023-08-30 23:04:34,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-08-30 23:04:34,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-08-30 23:04:34,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:04:34,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-08-30 23:04:34,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 23:04:34,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:04:34,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:04:34,166 INFO L175 Difference]: Start difference. First operand has 52 places, 88 transitions, 834 flow. Second operand 3 states and 248 transitions. [2023-08-30 23:04:34,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 128 transitions, 1420 flow [2023-08-30 23:04:34,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 128 transitions, 1346 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:04:34,653 INFO L231 Difference]: Finished difference. Result has 51 places, 87 transitions, 772 flow [2023-08-30 23:04:34,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=772, PETRI_PLACES=51, PETRI_TRANSITIONS=87} [2023-08-30 23:04:34,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2023-08-30 23:04:34,654 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 87 transitions, 772 flow [2023-08-30 23:04:34,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 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 23:04:34,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:34,654 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:04:34,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-30 23:04:34,655 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:04:34,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:34,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1049528128, now seen corresponding path program 1 times [2023-08-30 23:04:34,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:34,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15893233] [2023-08-30 23:04:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:34,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:04:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-30 23:04:34,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:04:34,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15893233] [2023-08-30 23:04:34,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15893233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:04:34,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:04:34,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:04:34,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57885684] [2023-08-30 23:04:34,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:04:34,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:04:34,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:04:34,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:04:34,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:04:34,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 23:04:34,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 87 transitions, 772 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 23:04:34,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:04:34,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 23:04:34,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:04:43,046 INFO L130 PetriNetUnfolder]: 83744/117939 cut-off events. [2023-08-30 23:04:43,046 INFO L131 PetriNetUnfolder]: For 338138/338138 co-relation queries the response was YES. [2023-08-30 23:04:43,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437267 conditions, 117939 events. 83744/117939 cut-off events. For 338138/338138 co-relation queries the response was YES. Maximal size of possible extension queue 7940. Compared 918723 event pairs, 30074 based on Foata normal form. 0/107390 useless extension candidates. Maximal degree in co-relation 245905. Up to 82253 conditions per place. [2023-08-30 23:04:44,000 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 80 selfloop transitions, 65 changer transitions 0/148 dead transitions. [2023-08-30 23:04:44,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 148 transitions, 1629 flow [2023-08-30 23:04:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:04:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:04:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-08-30 23:04:44,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-08-30 23:04:44,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-08-30 23:04:44,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-08-30 23:04:44,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:04:44,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-08-30 23:04:44,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 23:04:44,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:04:44,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:04:44,003 INFO L175 Difference]: Start difference. First operand has 51 places, 87 transitions, 772 flow. Second operand 3 states and 247 transitions. [2023-08-30 23:04:44,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 148 transitions, 1629 flow [2023-08-30 23:04:44,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 148 transitions, 1613 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:04:44,144 INFO L231 Difference]: Finished difference. Result has 54 places, 136 transitions, 1638 flow [2023-08-30 23:04:44,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1638, PETRI_PLACES=54, PETRI_TRANSITIONS=136} [2023-08-30 23:04:44,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2023-08-30 23:04:44,145 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 136 transitions, 1638 flow [2023-08-30 23:04:44,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 23:04:44,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:44,145 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:04:44,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-30 23:04:44,145 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:04:44,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:44,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1824370623, now seen corresponding path program 1 times [2023-08-30 23:04:44,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:44,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614371318] [2023-08-30 23:04:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:44,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:04:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-30 23:04:44,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:04:44,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614371318] [2023-08-30 23:04:44,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614371318] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:04:44,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:04:44,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:04:44,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300587597] [2023-08-30 23:04:44,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:04:44,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:04:44,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:04:44,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:04:44,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:04:44,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 23:04:44,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 136 transitions, 1638 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 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 23:04:44,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:04:44,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 23:04:44,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:04:51,222 INFO L130 PetriNetUnfolder]: 67349/92869 cut-off events. [2023-08-30 23:04:51,222 INFO L131 PetriNetUnfolder]: For 378525/378525 co-relation queries the response was YES. [2023-08-30 23:04:51,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412575 conditions, 92869 events. 67349/92869 cut-off events. For 378525/378525 co-relation queries the response was YES. Maximal size of possible extension queue 6428. Compared 687339 event pairs, 15691 based on Foata normal form. 4796/92936 useless extension candidates. Maximal degree in co-relation 225959. Up to 70802 conditions per place. [2023-08-30 23:04:52,053 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 175 selfloop transitions, 16 changer transitions 0/194 dead transitions. [2023-08-30 23:04:52,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 194 transitions, 2657 flow [2023-08-30 23:04:52,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:04:52,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:04:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-08-30 23:04:52,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775828460038986 [2023-08-30 23:04:52,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-08-30 23:04:52,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-08-30 23:04:52,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:04:52,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-08-30 23:04:52,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 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 23:04:52,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:04:52,057 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:04:52,057 INFO L175 Difference]: Start difference. First operand has 54 places, 136 transitions, 1638 flow. Second operand 3 states and 245 transitions. [2023-08-30 23:04:52,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 194 transitions, 2657 flow [2023-08-30 23:04:52,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 194 transitions, 2527 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:04:52,667 INFO L231 Difference]: Finished difference. Result has 53 places, 135 transitions, 1536 flow [2023-08-30 23:04:52,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1536, PETRI_PLACES=53, PETRI_TRANSITIONS=135} [2023-08-30 23:04:52,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2023-08-30 23:04:52,667 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 135 transitions, 1536 flow [2023-08-30 23:04:52,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 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 23:04:52,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:52,668 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:04:52,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-30 23:04:52,668 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:04:52,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:52,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1427917098, now seen corresponding path program 1 times [2023-08-30 23:04:52,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:52,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991750417] [2023-08-30 23:04:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:52,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:04:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-08-30 23:04:52,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:04:52,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991750417] [2023-08-30 23:04:52,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991750417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:04:52,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:04:52,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:04:52,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111143434] [2023-08-30 23:04:52,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:04:52,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:04:52,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:04:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:04:52,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:04:52,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 23:04:52,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 135 transitions, 1536 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 23:04:52,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:04:52,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 23:04:52,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:05:01,676 INFO L130 PetriNetUnfolder]: 78886/114494 cut-off events. [2023-08-30 23:05:01,677 INFO L131 PetriNetUnfolder]: For 460187/460187 co-relation queries the response was YES. [2023-08-30 23:05:02,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478503 conditions, 114494 events. 78886/114494 cut-off events. For 460187/460187 co-relation queries the response was YES. Maximal size of possible extension queue 8549. Compared 939167 event pairs, 27980 based on Foata normal form. 0/110251 useless extension candidates. Maximal degree in co-relation 272772. Up to 83371 conditions per place. [2023-08-30 23:05:03,063 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 111 selfloop transitions, 113 changer transitions 0/227 dead transitions. [2023-08-30 23:05:03,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 227 transitions, 3084 flow [2023-08-30 23:05:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:05:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:05:03,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-08-30 23:05:03,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756335282651072 [2023-08-30 23:05:03,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-08-30 23:05:03,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-08-30 23:05:03,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:05:03,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-08-30 23:05:03,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 23:05:03,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:05:03,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:05:03,080 INFO L175 Difference]: Start difference. First operand has 53 places, 135 transitions, 1536 flow. Second operand 3 states and 244 transitions. [2023-08-30 23:05:03,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 227 transitions, 3084 flow [2023-08-30 23:05:04,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 227 transitions, 3052 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:05:04,604 INFO L231 Difference]: Finished difference. Result has 56 places, 216 transitions, 3178 flow [2023-08-30 23:05:04,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3178, PETRI_PLACES=56, PETRI_TRANSITIONS=216} [2023-08-30 23:05:04,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2023-08-30 23:05:04,605 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 216 transitions, 3178 flow [2023-08-30 23:05:04,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 23:05:04,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:05:04,605 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:05:04,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-08-30 23:05:04,606 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:05:04,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:05:04,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1315761961, now seen corresponding path program 1 times [2023-08-30 23:05:04,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:05:04,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065556799] [2023-08-30 23:05:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:05:04,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:05:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:05:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-08-30 23:05:04,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:05:04,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065556799] [2023-08-30 23:05:04,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065556799] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:05:04,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:05:04,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:05:04,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290865253] [2023-08-30 23:05:04,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:05:04,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:05:04,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:05:04,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:05:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:05:04,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 23:05:04,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 216 transitions, 3178 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 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 23:05:04,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:05:04,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 23:05:04,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:05:13,364 INFO L130 PetriNetUnfolder]: 65645/97131 cut-off events. [2023-08-30 23:05:13,364 INFO L131 PetriNetUnfolder]: For 544589/544589 co-relation queries the response was YES. [2023-08-30 23:05:13,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463006 conditions, 97131 events. 65645/97131 cut-off events. For 544589/544589 co-relation queries the response was YES. Maximal size of possible extension queue 7103. Compared 809606 event pairs, 20879 based on Foata normal form. 4122/101132 useless extension candidates. Maximal degree in co-relation 264226. Up to 58024 conditions per place. [2023-08-30 23:05:14,197 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 266 selfloop transitions, 32 changer transitions 0/301 dead transitions. [2023-08-30 23:05:14,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 301 transitions, 4937 flow [2023-08-30 23:05:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:05:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:05:14,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-08-30 23:05:14,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47173489278752434 [2023-08-30 23:05:14,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-08-30 23:05:14,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-08-30 23:05:14,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:05:14,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-08-30 23:05:14,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 23:05:14,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:05:14,200 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 23:05:14,200 INFO L175 Difference]: Start difference. First operand has 56 places, 216 transitions, 3178 flow. Second operand 3 states and 242 transitions. [2023-08-30 23:05:14,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 301 transitions, 4937 flow [2023-08-30 23:05:14,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 301 transitions, 4711 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:05:14,998 INFO L231 Difference]: Finished difference. Result has 55 places, 215 transitions, 3012 flow [2023-08-30 23:05:14,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3012, PETRI_PLACES=55, PETRI_TRANSITIONS=215} [2023-08-30 23:05:14,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2023-08-30 23:05:14,998 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 215 transitions, 3012 flow [2023-08-30 23:05:14,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 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 23:05:14,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:05:14,999 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:05:14,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-08-30 23:05:14,999 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 23:05:14,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:05:14,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2129659553, now seen corresponding path program 1 times [2023-08-30 23:05:14,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:05:15,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083793554] [2023-08-30 23:05:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:05:15,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:05:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:05:15,012 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:05:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:05:15,022 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:05:15,023 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:05:15,023 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-30 23:05:15,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-08-30 23:05:15,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-08-30 23:05:15,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-08-30 23:05:15,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-08-30 23:05:15,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-08-30 23:05:15,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-08-30 23:05:15,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-08-30 23:05:15,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-30 23:05:15,024 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:05:15,025 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:05:15,025 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-30 23:05:15,043 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:05:15,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 112 transitions, 301 flow [2023-08-30 23:05:15,058 INFO L130 PetriNetUnfolder]: 8/194 cut-off events. [2023-08-30 23:05:15,058 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 23:05:15,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 194 events. 8/194 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 386 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 197. Up to 16 conditions per place. [2023-08-30 23:05:15,060 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 112 transitions, 301 flow [2023-08-30 23:05:15,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 112 transitions, 301 flow [2023-08-30 23:05:15,060 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:05:15,061 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 112 transitions, 301 flow [2023-08-30 23:05:15,061 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 112 transitions, 301 flow [2023-08-30 23:05:15,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 112 transitions, 301 flow [2023-08-30 23:05:15,074 INFO L130 PetriNetUnfolder]: 8/194 cut-off events. [2023-08-30 23:05:15,074 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 23:05:15,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 194 events. 8/194 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 386 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 197. Up to 16 conditions per place. [2023-08-30 23:05:15,080 INFO L119 LiptonReduction]: Number of co-enabled transitions 7546 [2023-08-30 23:05:16,432 INFO L134 LiptonReduction]: Checked pairs total: 12943 [2023-08-30 23:05:16,432 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-30 23:05:16,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:05:16,433 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;@739e621, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:05:16,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-30 23:05:16,434 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-08-30 23:05:16,434 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:05:16,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:05:16,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 23:05:16,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 23:05:16,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:05:16,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1047119421, now seen corresponding path program 1 times [2023-08-30 23:05:16,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:05:16,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500393729] [2023-08-30 23:05:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:05:16,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:05:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:05:16,451 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 23:05:16,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:05:16,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500393729] [2023-08-30 23:05:16,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500393729] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:05:16,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:05:16,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:05:16,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239471604] [2023-08-30 23:05:16,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:05:16,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:05:16,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:05:16,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:05:16,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:05:16,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 23:05:16,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 23:05:16,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:05:16,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 23:05:16,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:05:37,680 INFO L130 PetriNetUnfolder]: 297494/377965 cut-off events. [2023-08-30 23:05:37,680 INFO L131 PetriNetUnfolder]: For 287847/287847 co-relation queries the response was YES. [2023-08-30 23:05:38,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832316 conditions, 377965 events. 297494/377965 cut-off events. For 287847/287847 co-relation queries the response was YES. Maximal size of possible extension queue 16101. Compared 2473201 event pairs, 176580 based on Foata normal form. 0/272848 useless extension candidates. Maximal degree in co-relation 183188. Up to 254687 conditions per place. [2023-08-30 23:05:39,992 INFO L137 encePairwiseOnDemand]: 181/191 looper letters, 48 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2023-08-30 23:05:39,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 367 flow [2023-08-30 23:05:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:05:39,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:05:39,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2023-08-30 23:05:39,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113438045375218 [2023-08-30 23:05:39,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2023-08-30 23:05:39,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2023-08-30 23:05:39,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:05:39,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2023-08-30 23:05:39,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 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 23:05:39,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:05:39,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:05:39,995 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 145 flow. Second operand 3 states and 293 transitions. [2023-08-30 23:05:39,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 367 flow [2023-08-30 23:05:40,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 295 flow, removed 36 selfloop flow, removed 0 redundant places. [2023-08-30 23:05:40,164 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 163 flow [2023-08-30 23:05:40,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-08-30 23:05:40,164 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-30 23:05:40,164 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 163 flow [2023-08-30 23:05:40,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 23:05:40,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:05:40,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:05:40,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-08-30 23:05:40,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 23:05:40,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:05:40,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1309768385, now seen corresponding path program 1 times [2023-08-30 23:05:40,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:05:40,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424593313] [2023-08-30 23:05:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:05:40,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:05:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:05:40,182 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 23:05:40,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:05:40,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424593313] [2023-08-30 23:05:40,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424593313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:05:40,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:05:40,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:05:40,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882230924] [2023-08-30 23:05:40,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:05:40,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:05:40,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:05:40,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:05:40,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:05:40,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 23:05:40,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 23:05:40,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:05:40,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 23:05:40,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:06:16,189 INFO L130 PetriNetUnfolder]: 423576/541309 cut-off events. [2023-08-30 23:06:16,189 INFO L131 PetriNetUnfolder]: For 286495/286495 co-relation queries the response was YES. [2023-08-30 23:06:18,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365244 conditions, 541309 events. 423576/541309 cut-off events. For 286495/286495 co-relation queries the response was YES. Maximal size of possible extension queue 23989. Compared 3735900 event pairs, 215810 based on Foata normal form. 0/413115 useless extension candidates. Maximal degree in co-relation 647466. Up to 370121 conditions per place. [2023-08-30 23:06:21,951 INFO L137 encePairwiseOnDemand]: 182/191 looper letters, 54 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2023-08-30 23:06:21,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 428 flow [2023-08-30 23:06:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:06:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:06:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-08-30 23:06:21,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506108202443281 [2023-08-30 23:06:21,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-08-30 23:06:21,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-08-30 23:06:21,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:06:21,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-08-30 23:06:21,969 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 23:06:21,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:06:21,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:06:21,986 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 163 flow. Second operand 3 states and 290 transitions. [2023-08-30 23:06:21,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 428 flow [2023-08-30 23:07:25,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 71 transitions, 398 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:07:25,068 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 275 flow [2023-08-30 23:07:25,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-08-30 23:07:25,069 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-08-30 23:07:25,069 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 275 flow [2023-08-30 23:07:25,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 23:07:25,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:07:25,069 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:07:25,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-08-30 23:07:25,069 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 23:07:25,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:07:25,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1945745256, now seen corresponding path program 1 times [2023-08-30 23:07:25,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:07:25,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451241771] [2023-08-30 23:07:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:07:25,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:07:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:07:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 23:07:25,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:07:25,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451241771] [2023-08-30 23:07:25,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451241771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:07:25,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:07:25,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:07:25,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756219628] [2023-08-30 23:07:25,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:07:25,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:07:25,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:07:25,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:07:25,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:07:25,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 23:07:25,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 275 flow. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 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 23:07:25,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:07:25,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 23:07:25,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:07:51,584 INFO L130 PetriNetUnfolder]: 345272/429917 cut-off events. [2023-08-30 23:07:51,584 INFO L131 PetriNetUnfolder]: For 362722/362722 co-relation queries the response was YES. [2023-08-30 23:07:53,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1258871 conditions, 429917 events. 345272/429917 cut-off events. For 362722/362722 co-relation queries the response was YES. Maximal size of possible extension queue 19479. Compared 2779549 event pairs, 66448 based on Foata normal form. 0/337171 useless extension candidates. Maximal degree in co-relation 1258814. Up to 345956 conditions per place. [2023-08-30 23:07:55,291 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 77 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-30 23:07:55,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 585 flow [2023-08-30 23:07:55,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:07:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:07:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2023-08-30 23:07:55,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043630017452007 [2023-08-30 23:07:55,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2023-08-30 23:07:55,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2023-08-30 23:07:55,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:07:55,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2023-08-30 23:07:55,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 23:07:55,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:07:55,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:07:55,294 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 275 flow. Second operand 3 states and 289 transitions. [2023-08-30 23:07:55,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 585 flow [2023-08-30 23:08:53,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 543 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:08:53,295 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 247 flow [2023-08-30 23:08:53,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-08-30 23:08:53,295 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-08-30 23:08:53,296 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 247 flow [2023-08-30 23:08:53,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 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 23:08:53,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:08:53,296 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:08:53,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-08-30 23:08:53,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 23:08:53,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:08:53,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1948110235, now seen corresponding path program 1 times [2023-08-30 23:08:53,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:08:53,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113278345] [2023-08-30 23:08:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:08:53,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:08:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:08:53,326 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 23:08:53,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:08:53,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113278345] [2023-08-30 23:08:53,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113278345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:08:53,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:08:53,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:08:53,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35294867] [2023-08-30 23:08:53,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:08:53,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:08:53,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:08:53,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:08:53,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:08:53,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 23:08:53,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 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 23:08:53,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:08:53,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 23:08:53,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:09:16,789 INFO L130 PetriNetUnfolder]: 280909/351017 cut-off events. [2023-08-30 23:09:16,789 INFO L131 PetriNetUnfolder]: For 239234/239234 co-relation queries the response was YES. [2023-08-30 23:09:18,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992745 conditions, 351017 events. 280909/351017 cut-off events. For 239234/239234 co-relation queries the response was YES. Maximal size of possible extension queue 16167. Compared 2229218 event pairs, 48119 based on Foata normal form. 0/274201 useless extension candidates. Maximal degree in co-relation 532135. Up to 281912 conditions per place. [2023-08-30 23:09:19,662 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 74 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-30 23:09:19,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 528 flow [2023-08-30 23:09:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:09:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:09:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2023-08-30 23:09:19,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49912739965095987 [2023-08-30 23:09:19,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2023-08-30 23:09:19,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2023-08-30 23:09:19,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:09:19,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2023-08-30 23:09:19,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 23:09:19,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:09:19,664 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:09:19,664 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 247 flow. Second operand 3 states and 286 transitions. [2023-08-30 23:09:19,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 528 flow [2023-08-30 23:09:19,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:09:19,709 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 245 flow [2023-08-30 23:09:19,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-08-30 23:09:19,710 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-08-30 23:09:19,710 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 245 flow [2023-08-30 23:09:19,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 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 23:09:19,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:09:19,710 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 23:09:19,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-08-30 23:09:19,710 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 23:09:19,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:09:19,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1211223203, now seen corresponding path program 1 times [2023-08-30 23:09:19,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:09:19,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107653989] [2023-08-30 23:09:19,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:09:19,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:09:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:09:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:09:19,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:09:19,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107653989] [2023-08-30 23:09:19,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107653989] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:09:19,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:09:19,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:09:19,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73299585] [2023-08-30 23:09:19,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:09:19,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:09:19,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:09:19,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:09:19,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:09:19,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 23:09:19,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 23:09:19,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:09:19,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 23:09:19,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:09:53,148 INFO L130 PetriNetUnfolder]: 385656/500287 cut-off events. [2023-08-30 23:09:53,148 INFO L131 PetriNetUnfolder]: For 463772/463772 co-relation queries the response was YES. [2023-08-30 23:09:55,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404945 conditions, 500287 events. 385656/500287 cut-off events. For 463772/463772 co-relation queries the response was YES. Maximal size of possible extension queue 23419. Compared 3597143 event pairs, 176836 based on Foata normal form. 0/398680 useless extension candidates. Maximal degree in co-relation 759541. Up to 349769 conditions per place. [2023-08-30 23:09:57,474 INFO L137 encePairwiseOnDemand]: 182/191 looper letters, 60 selfloop transitions, 25 changer transitions 0/88 dead transitions. [2023-08-30 23:09:57,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 605 flow [2023-08-30 23:09:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:09:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:09:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-08-30 23:09:57,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973821989528796 [2023-08-30 23:09:57,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-08-30 23:09:57,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-08-30 23:09:57,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:09:57,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-08-30 23:09:57,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 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 23:09:57,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:09:57,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:09:57,477 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 245 flow. Second operand 3 states and 285 transitions. [2023-08-30 23:09:57,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 605 flow [2023-08-30 23:10:00,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 601 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:10:00,671 INFO L231 Difference]: Finished difference. Result has 56 places, 71 transitions, 513 flow [2023-08-30 23:10:00,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=513, PETRI_PLACES=56, PETRI_TRANSITIONS=71} [2023-08-30 23:10:00,672 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-08-30 23:10:00,672 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 71 transitions, 513 flow [2023-08-30 23:10:00,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 23:10:00,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:10:00,673 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:10:00,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-08-30 23:10:00,673 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 23:10:00,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:10:00,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1106781706, now seen corresponding path program 1 times [2023-08-30 23:10:00,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:10:00,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893877640] [2023-08-30 23:10:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:10:00,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:10:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:10:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:10:00,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:10:00,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893877640] [2023-08-30 23:10:00,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893877640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:10:00,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:10:00,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:10:00,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681740120] [2023-08-30 23:10:00,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:10:00,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:10:00,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:10:00,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:10:00,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:10:00,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 23:10:00,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 71 transitions, 513 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 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 23:10:00,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:10:00,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 23:10:00,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:10:31,384 INFO L130 PetriNetUnfolder]: 311645/393393 cut-off events. [2023-08-30 23:10:31,385 INFO L131 PetriNetUnfolder]: For 652015/652015 co-relation queries the response was YES. [2023-08-30 23:10:32,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1350528 conditions, 393393 events. 311645/393393 cut-off events. For 652015/652015 co-relation queries the response was YES. Maximal size of possible extension queue 19046. Compared 2620483 event pairs, 55633 based on Foata normal form. 16278/339366 useless extension candidates. Maximal degree in co-relation 675481. Up to 313668 conditions per place. [2023-08-30 23:10:34,939 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 100 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-08-30 23:10:34,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 107 transitions, 943 flow [2023-08-30 23:10:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:10:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:10:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-08-30 23:10:34,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.493891797556719 [2023-08-30 23:10:34,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-08-30 23:10:34,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-08-30 23:10:34,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:10:34,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-08-30 23:10:34,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 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 23:10:34,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:10:34,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:10:34,941 INFO L175 Difference]: Start difference. First operand has 56 places, 71 transitions, 513 flow. Second operand 3 states and 283 transitions. [2023-08-30 23:10:34,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 107 transitions, 943 flow [2023-08-30 23:10:46,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 107 transitions, 893 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:10:46,861 INFO L231 Difference]: Finished difference. Result has 55 places, 70 transitions, 467 flow [2023-08-30 23:10:46,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=467, PETRI_PLACES=55, PETRI_TRANSITIONS=70} [2023-08-30 23:10:46,861 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 6 predicate places. [2023-08-30 23:10:46,861 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 70 transitions, 467 flow [2023-08-30 23:10:46,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 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 23:10:46,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:10:46,862 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:10:46,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-08-30 23:10:46,862 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 23:10:46,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:10:46,863 INFO L85 PathProgramCache]: Analyzing trace with hash -112241581, now seen corresponding path program 1 times [2023-08-30 23:10:46,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:10:46,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130991025] [2023-08-30 23:10:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:10:46,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:10:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:10:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 23:10:46,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:10:46,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130991025] [2023-08-30 23:10:46,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130991025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:10:46,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:10:46,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:10:46,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760041854] [2023-08-30 23:10:46,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:10:46,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:10:46,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:10:46,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:10:46,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:10:46,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 23:10:46,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 70 transitions, 467 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 23:10:46,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:10:46,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 23:10:46,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:11:26,305 INFO L130 PetriNetUnfolder]: 417794/548677 cut-off events. [2023-08-30 23:11:26,305 INFO L131 PetriNetUnfolder]: For 983585/983585 co-relation queries the response was YES. [2023-08-30 23:11:28,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767727 conditions, 548677 events. 417794/548677 cut-off events. For 983585/983585 co-relation queries the response was YES. Maximal size of possible extension queue 26916. Compared 4121705 event pairs, 172730 based on Foata normal form. 0/458425 useless extension candidates. Maximal degree in co-relation 983136. Up to 387351 conditions per place. [2023-08-30 23:11:31,579 INFO L137 encePairwiseOnDemand]: 182/191 looper letters, 75 selfloop transitions, 45 changer transitions 0/123 dead transitions. [2023-08-30 23:11:31,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 123 transitions, 1072 flow [2023-08-30 23:11:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:11:31,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:11:31,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-08-30 23:11:31,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49214659685863876 [2023-08-30 23:11:31,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-08-30 23:11:31,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-08-30 23:11:31,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:11:31,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-08-30 23:11:31,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 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 23:11:31,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:11:31,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:11:31,582 INFO L175 Difference]: Start difference. First operand has 55 places, 70 transitions, 467 flow. Second operand 3 states and 282 transitions. [2023-08-30 23:11:31,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 123 transitions, 1072 flow [2023-08-30 23:11:32,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 123 transitions, 1064 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:11:32,279 INFO L231 Difference]: Finished difference. Result has 58 places, 107 transitions, 1021 flow [2023-08-30 23:11:32,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1021, PETRI_PLACES=58, PETRI_TRANSITIONS=107} [2023-08-30 23:11:32,279 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2023-08-30 23:11:32,279 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 107 transitions, 1021 flow [2023-08-30 23:11:32,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 23:11:32,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:11:32,280 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:11:32,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-08-30 23:11:32,280 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 23:11:32,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:11:32,280 INFO L85 PathProgramCache]: Analyzing trace with hash 815483311, now seen corresponding path program 1 times [2023-08-30 23:11:32,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:11:32,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048255115] [2023-08-30 23:11:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:11:32,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:11:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:11:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 23:11:32,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:11:32,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048255115] [2023-08-30 23:11:32,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048255115] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:11:32,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:11:32,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:11:32,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092703014] [2023-08-30 23:11:32,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:11:32,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:11:32,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:11:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:11:32,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:11:32,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 23:11:32,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 107 transitions, 1021 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:11:32,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:11:32,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 23:11:32,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:12:05,642 INFO L130 PetriNetUnfolder]: 335923/429061 cut-off events. [2023-08-30 23:12:05,642 INFO L131 PetriNetUnfolder]: For 1173031/1173031 co-relation queries the response was YES. [2023-08-30 23:12:07,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1670367 conditions, 429061 events. 335923/429061 cut-off events. For 1173031/1173031 co-relation queries the response was YES. Maximal size of possible extension queue 21877. Compared 3002326 event pairs, 64967 based on Foata normal form. 18824/389225 useless extension candidates. Maximal degree in co-relation 947173. Up to 340086 conditions per place. [2023-08-30 23:12:09,756 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 147 selfloop transitions, 8 changer transitions 0/158 dead transitions. [2023-08-30 23:12:09,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 158 transitions, 1758 flow [2023-08-30 23:12:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:12:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:12:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-30 23:12:09,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4886561954624782 [2023-08-30 23:12:09,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-30 23:12:09,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-30 23:12:09,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:12:09,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-30 23:12:09,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 23:12:09,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:12:09,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:12:09,762 INFO L175 Difference]: Start difference. First operand has 58 places, 107 transitions, 1021 flow. Second operand 3 states and 280 transitions. [2023-08-30 23:12:09,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 158 transitions, 1758 flow [2023-08-30 23:12:24,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 158 transitions, 1668 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:12:24,718 INFO L231 Difference]: Finished difference. Result has 57 places, 106 transitions, 943 flow [2023-08-30 23:12:24,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=943, PETRI_PLACES=57, PETRI_TRANSITIONS=106} [2023-08-30 23:12:24,718 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2023-08-30 23:12:24,719 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 106 transitions, 943 flow [2023-08-30 23:12:24,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:12:24,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:12:24,719 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:12:24,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-08-30 23:12:24,719 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 23:12:24,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:12:24,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1371215118, now seen corresponding path program 1 times [2023-08-30 23:12:24,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:12:24,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585004727] [2023-08-30 23:12:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:12:24,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:12:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:12:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-30 23:12:24,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:12:24,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585004727] [2023-08-30 23:12:24,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585004727] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:12:24,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:12:24,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:12:24,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264346606] [2023-08-30 23:12:24,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:12:24,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:12:24,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:12:24,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:12:24,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:12:24,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 23:12:24,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 106 transitions, 943 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 23:12:24,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:12:24,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 23:12:24,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:13:12,382 INFO L130 PetriNetUnfolder]: 439672/585215 cut-off events. [2023-08-30 23:13:12,382 INFO L131 PetriNetUnfolder]: For 1746645/1746645 co-relation queries the response was YES. [2023-08-30 23:13:15,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2143905 conditions, 585215 events. 439672/585215 cut-off events. For 1746645/1746645 co-relation queries the response was YES. Maximal size of possible extension queue 30348. Compared 4591998 event pairs, 165426 based on Foata normal form. 0/513184 useless extension candidates. Maximal degree in co-relation 1260964. Up to 416353 conditions per place. [2023-08-30 23:13:19,392 INFO L137 encePairwiseOnDemand]: 182/191 looper letters, 102 selfloop transitions, 81 changer transitions 0/186 dead transitions. [2023-08-30 23:13:19,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 186 transitions, 2047 flow [2023-08-30 23:13:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:13:19,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:13:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 279 transitions. [2023-08-30 23:13:19,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869109947643979 [2023-08-30 23:13:19,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 279 transitions. [2023-08-30 23:13:19,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 279 transitions. [2023-08-30 23:13:19,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:13:19,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 279 transitions. [2023-08-30 23:13:19,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 23:13:19,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:13:19,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 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 23:13:19,395 INFO L175 Difference]: Start difference. First operand has 57 places, 106 transitions, 943 flow. Second operand 3 states and 279 transitions. [2023-08-30 23:13:19,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 186 transitions, 2047 flow [2023-08-30 23:13:22,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 186 transitions, 2031 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:13:22,435 INFO L231 Difference]: Finished difference. Result has 60 places, 171 transitions, 2065 flow [2023-08-30 23:13:22,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2065, PETRI_PLACES=60, PETRI_TRANSITIONS=171} [2023-08-30 23:13:22,435 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2023-08-30 23:13:22,436 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 171 transitions, 2065 flow [2023-08-30 23:13:22,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 23:13:22,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:13:22,436 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:13:22,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-08-30 23:13:22,436 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 23:13:22,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:13:22,437 INFO L85 PathProgramCache]: Analyzing trace with hash -441998740, now seen corresponding path program 1 times [2023-08-30 23:13:22,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:13:22,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896775082] [2023-08-30 23:13:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:13:22,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:13:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:13:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-30 23:13:22,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:13:22,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896775082] [2023-08-30 23:13:22,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896775082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:13:22,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:13:22,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:13:22,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566306112] [2023-08-30 23:13:22,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:13:22,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:13:22,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:13:22,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:13:22,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:13:22,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 23:13:22,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 171 transitions, 2065 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 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 23:13:22,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:13:22,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 23:13:22,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15