./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-divine/ring_1w1r-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-divine/ring_1w1r-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b7e9feb6929ab81158cc9d6731414a71af210f92cb571da2954e02689fee6d2b --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:53:19,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:53:19,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:53:19,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:53:19,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:53:19,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:53:19,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:53:19,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:53:19,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:53:19,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:53:19,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:53:19,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:53:19,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:53:19,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:53:19,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:53:19,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:53:19,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:53:19,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:53:19,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:53:19,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:53:19,119 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:53:19,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:53:19,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:53:19,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:53:19,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:53:19,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:53:19,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:53:19,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:53:19,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:53:19,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:53:19,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:53:19,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:53:19,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:53:19,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:53:19,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:53:19,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:53:19,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:53:19,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:53:19,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:53:19,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:53:19,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:53:19,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:53:19,140 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:53:19,166 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:53:19,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:53:19,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:53:19,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:53:19,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:53:19,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:53:19,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:53:19,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:53:19,169 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:53:19,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:53:19,170 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:53:19,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:53:19,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:53:19,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:53:19,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:53:19,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:53:19,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:53:19,171 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:53:19,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:53:19,172 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:53:19,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:53:19,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:53:19,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:53:19,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:53:19,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:53:19,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:53:19,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:53:19,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:53:19,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:53:19,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:53:19,174 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:53:19,174 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:53:19,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:53:19,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7e9feb6929ab81158cc9d6731414a71af210f92cb571da2954e02689fee6d2b [2022-07-13 21:53:19,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:53:19,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:53:19,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:53:19,454 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:53:19,455 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:53:19,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/ring_1w1r-2.i [2022-07-13 21:53:19,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/206d26bae/dcdad1721d724d7c98ac566f6945a49e/FLAG08bf59d16 [2022-07-13 21:53:20,042 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:53:20,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_1w1r-2.i [2022-07-13 21:53:20,058 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/206d26bae/dcdad1721d724d7c98ac566f6945a49e/FLAG08bf59d16 [2022-07-13 21:53:20,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/206d26bae/dcdad1721d724d7c98ac566f6945a49e [2022-07-13 21:53:20,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:53:20,343 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:53:20,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:53:20,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:53:20,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:53:20,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:53:20" (1/1) ... [2022-07-13 21:53:20,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dddd83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:20, skipping insertion in model container [2022-07-13 21:53:20,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:53:20" (1/1) ... [2022-07-13 21:53:20,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:53:20,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:53:20,533 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-13 21:53:20,756 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_1w1r-2.i[39095,39108] [2022-07-13 21:53:20,762 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_1w1r-2.i[39180,39193] [2022-07-13 21:53:20,763 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_1w1r-2.i[39232,39245] [2022-07-13 21:53:20,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:53:20,780 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:53:20,794 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-13 21:53:20,835 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_1w1r-2.i[39095,39108] [2022-07-13 21:53:20,837 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_1w1r-2.i[39180,39193] [2022-07-13 21:53:20,838 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_1w1r-2.i[39232,39245] [2022-07-13 21:53:20,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:53:20,887 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:53:20,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:20 WrapperNode [2022-07-13 21:53:20,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:53:20,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:53:20,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:53:20,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:53:20,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:20" (1/1) ... [2022-07-13 21:53:20,923 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:20" (1/1) ... [2022-07-13 21:53:20,954 INFO L137 Inliner]: procedures = 224, calls = 41, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 125 [2022-07-13 21:53:20,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:53:20,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:53:20,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:53:20,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:53:20,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:20" (1/1) ... [2022-07-13 21:53:20,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:20" (1/1) ... [2022-07-13 21:53:20,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:20" (1/1) ... [2022-07-13 21:53:20,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:20" (1/1) ... [2022-07-13 21:53:20,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:20" (1/1) ... [2022-07-13 21:53:20,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:20" (1/1) ... [2022-07-13 21:53:21,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:20" (1/1) ... [2022-07-13 21:53:21,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:53:21,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:53:21,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:53:21,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:53:21,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:20" (1/1) ... [2022-07-13 21:53:21,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:53:21,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:53:21,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 21:53:21,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 21:53:21,101 INFO L130 BoogieDeclarations]: Found specification of procedure reader_fn [2022-07-13 21:53:21,101 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_fn [2022-07-13 21:53:21,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:53:21,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:53:21,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:53:21,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:53:21,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:53:21,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:53:21,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:53:21,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:53:21,104 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:53:21,248 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:53:21,250 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:53:21,481 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:53:21,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:53:21,489 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 21:53:21,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:53:21 BoogieIcfgContainer [2022-07-13 21:53:21,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:53:21,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:53:21,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:53:21,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:53:21,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:53:20" (1/3) ... [2022-07-13 21:53:21,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794dbbba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:53:21, skipping insertion in model container [2022-07-13 21:53:21,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:20" (2/3) ... [2022-07-13 21:53:21,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794dbbba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:53:21, skipping insertion in model container [2022-07-13 21:53:21,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:53:21" (3/3) ... [2022-07-13 21:53:21,504 INFO L111 eAbstractionObserver]: Analyzing ICFG ring_1w1r-2.i [2022-07-13 21:53:21,508 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:53:21,516 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:53:21,516 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-07-13 21:53:21,517 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:53:21,577 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:53:21,627 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 152 places, 158 transitions, 324 flow [2022-07-13 21:53:21,682 INFO L129 PetriNetUnfolder]: 10/157 cut-off events. [2022-07-13 21:53:21,683 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:53:21,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 157 events. 10/157 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 270 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2022-07-13 21:53:21,690 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 158 transitions, 324 flow [2022-07-13 21:53:21,699 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 148 transitions, 299 flow [2022-07-13 21:53:21,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:53:21,724 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7440b71c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@54717e8f [2022-07-13 21:53:21,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-13 21:53:21,746 INFO L129 PetriNetUnfolder]: 2/52 cut-off events. [2022-07-13 21:53:21,748 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:53:21,748 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:21,749 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:21,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:53:21,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:21,755 INFO L85 PathProgramCache]: Analyzing trace with hash 847621616, now seen corresponding path program 1 times [2022-07-13 21:53:21,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:21,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204456641] [2022-07-13 21:53:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:21,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:21,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:21,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204456641] [2022-07-13 21:53:21,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204456641] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:21,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:21,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:53:21,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408003495] [2022-07-13 21:53:21,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:22,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:53:22,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:22,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:53:22,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:53:22,046 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 158 [2022-07-13 21:53:22,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 148 transitions, 299 flow. Second operand has 2 states, 2 states have (on average 151.0) internal successors, (302), 2 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:22,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:22,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 158 [2022-07-13 21:53:22,053 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:22,094 INFO L129 PetriNetUnfolder]: 4/142 cut-off events. [2022-07-13 21:53:22,094 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:53:22,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 142 events. 4/142 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 6/141 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-07-13 21:53:22,099 INFO L132 encePairwiseOnDemand]: 152/158 looper letters, 1 selfloop transitions, 0 changer transitions 0/142 dead transitions. [2022-07-13 21:53:22,099 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 142 transitions, 289 flow [2022-07-13 21:53:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:53:22,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:53:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 307 transitions. [2022-07-13 21:53:22,115 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9715189873417721 [2022-07-13 21:53:22,116 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 307 transitions. [2022-07-13 21:53:22,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 307 transitions. [2022-07-13 21:53:22,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:22,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 307 transitions. [2022-07-13 21:53:22,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 153.5) internal successors, (307), 2 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:22,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:22,134 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:22,135 INFO L186 Difference]: Start difference. First operand has 142 places, 148 transitions, 299 flow. Second operand 2 states and 307 transitions. [2022-07-13 21:53:22,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 142 transitions, 289 flow [2022-07-13 21:53:22,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 142 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:53:22,145 INFO L242 Difference]: Finished difference. Result has 142 places, 142 transitions, 286 flow [2022-07-13 21:53:22,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=286, PETRI_PLACES=142, PETRI_TRANSITIONS=142} [2022-07-13 21:53:22,151 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 0 predicate places. [2022-07-13 21:53:22,151 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 142 transitions, 286 flow [2022-07-13 21:53:22,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 151.0) internal successors, (302), 2 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:22,152 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:22,152 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:22,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:53:22,153 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:53:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:22,154 INFO L85 PathProgramCache]: Analyzing trace with hash 506434889, now seen corresponding path program 1 times [2022-07-13 21:53:22,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:22,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591598829] [2022-07-13 21:53:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:22,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:22,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:22,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591598829] [2022-07-13 21:53:22,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591598829] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:22,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:22,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:53:22,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410995029] [2022-07-13 21:53:22,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:22,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:53:22,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:22,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:53:22,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:53:22,257 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 158 [2022-07-13 21:53:22,258 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 142 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:22,259 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:22,259 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 158 [2022-07-13 21:53:22,259 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:22,338 INFO L129 PetriNetUnfolder]: 5/185 cut-off events. [2022-07-13 21:53:22,339 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:53:22,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 185 events. 5/185 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 161 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 196. Up to 7 conditions per place. [2022-07-13 21:53:22,344 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 7 selfloop transitions, 2 changer transitions 0/145 dead transitions. [2022-07-13 21:53:22,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 145 transitions, 310 flow [2022-07-13 21:53:22,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:53:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:53:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2022-07-13 21:53:22,348 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9388185654008439 [2022-07-13 21:53:22,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2022-07-13 21:53:22,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2022-07-13 21:53:22,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:22,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2022-07-13 21:53:22,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:22,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:22,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:22,355 INFO L186 Difference]: Start difference. First operand has 142 places, 142 transitions, 286 flow. Second operand 3 states and 445 transitions. [2022-07-13 21:53:22,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 145 transitions, 310 flow [2022-07-13 21:53:22,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 145 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:53:22,363 INFO L242 Difference]: Finished difference. Result has 145 places, 143 transitions, 298 flow [2022-07-13 21:53:22,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=145, PETRI_TRANSITIONS=143} [2022-07-13 21:53:22,364 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 3 predicate places. [2022-07-13 21:53:22,364 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 143 transitions, 298 flow [2022-07-13 21:53:22,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:22,365 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:22,365 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:22,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:53:22,366 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:53:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:22,367 INFO L85 PathProgramCache]: Analyzing trace with hash -654644372, now seen corresponding path program 1 times [2022-07-13 21:53:22,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:22,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512462734] [2022-07-13 21:53:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:22,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:22,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:22,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512462734] [2022-07-13 21:53:22,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512462734] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:22,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:22,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:53:22,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447196770] [2022-07-13 21:53:22,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:22,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:53:22,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:22,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:53:22,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:53:22,893 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 158 [2022-07-13 21:53:22,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 143 transitions, 298 flow. Second operand has 18 states, 18 states have (on average 88.27777777777777) internal successors, (1589), 18 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:22,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:22,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 158 [2022-07-13 21:53:22,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:24,962 INFO L129 PetriNetUnfolder]: 583/2004 cut-off events. [2022-07-13 21:53:24,962 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:53:24,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3132 conditions, 2004 events. 583/2004 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 12919 event pairs, 252 based on Foata normal form. 0/1894 useless extension candidates. Maximal degree in co-relation 3127. Up to 766 conditions per place. [2022-07-13 21:53:24,972 INFO L132 encePairwiseOnDemand]: 137/158 looper letters, 129 selfloop transitions, 34 changer transitions 10/255 dead transitions. [2022-07-13 21:53:24,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 255 transitions, 868 flow [2022-07-13 21:53:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 21:53:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-13 21:53:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2067 transitions. [2022-07-13 21:53:24,979 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5946490218642118 [2022-07-13 21:53:24,979 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2067 transitions. [2022-07-13 21:53:24,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2067 transitions. [2022-07-13 21:53:24,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:24,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2067 transitions. [2022-07-13 21:53:24,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 93.95454545454545) internal successors, (2067), 22 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:24,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 158.0) internal successors, (3634), 23 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:24,992 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 158.0) internal successors, (3634), 23 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:24,993 INFO L186 Difference]: Start difference. First operand has 145 places, 143 transitions, 298 flow. Second operand 22 states and 2067 transitions. [2022-07-13 21:53:24,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 255 transitions, 868 flow [2022-07-13 21:53:24,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 255 transitions, 866 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:53:24,998 INFO L242 Difference]: Finished difference. Result has 175 places, 174 transitions, 503 flow [2022-07-13 21:53:24,998 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=503, PETRI_PLACES=175, PETRI_TRANSITIONS=174} [2022-07-13 21:53:24,999 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 33 predicate places. [2022-07-13 21:53:24,999 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 174 transitions, 503 flow [2022-07-13 21:53:25,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 88.27777777777777) internal successors, (1589), 18 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:25,000 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:25,001 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:25,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:53:25,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:53:25,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:25,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2143908831, now seen corresponding path program 1 times [2022-07-13 21:53:25,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:25,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134819352] [2022-07-13 21:53:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:25,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:25,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134819352] [2022-07-13 21:53:25,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134819352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:25,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:25,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-13 21:53:25,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615920444] [2022-07-13 21:53:25,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:25,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 21:53:25,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:25,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 21:53:25,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-07-13 21:53:25,821 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-07-13 21:53:25,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 174 transitions, 503 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:25,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:25,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-07-13 21:53:25,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:30,903 INFO L129 PetriNetUnfolder]: 1897/5427 cut-off events. [2022-07-13 21:53:30,903 INFO L130 PetriNetUnfolder]: For 1616/1621 co-relation queries the response was YES. [2022-07-13 21:53:30,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11034 conditions, 5427 events. 1897/5427 cut-off events. For 1616/1621 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 38950 event pairs, 630 based on Foata normal form. 20/5210 useless extension candidates. Maximal degree in co-relation 11019. Up to 1877 conditions per place. [2022-07-13 21:53:30,939 INFO L132 encePairwiseOnDemand]: 125/158 looper letters, 337 selfloop transitions, 91 changer transitions 3/502 dead transitions. [2022-07-13 21:53:30,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 502 transitions, 2593 flow [2022-07-13 21:53:30,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 21:53:30,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-13 21:53:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3138 transitions. [2022-07-13 21:53:30,951 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5367772836127267 [2022-07-13 21:53:30,951 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3138 transitions. [2022-07-13 21:53:30,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3138 transitions. [2022-07-13 21:53:30,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:30,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3138 transitions. [2022-07-13 21:53:30,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 84.8108108108108) internal successors, (3138), 37 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:30,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 158.0) internal successors, (6004), 38 states have internal predecessors, (6004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:30,973 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 158.0) internal successors, (6004), 38 states have internal predecessors, (6004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:30,973 INFO L186 Difference]: Start difference. First operand has 175 places, 174 transitions, 503 flow. Second operand 37 states and 3138 transitions. [2022-07-13 21:53:30,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 502 transitions, 2593 flow [2022-07-13 21:53:30,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 502 transitions, 2582 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-13 21:53:30,998 INFO L242 Difference]: Finished difference. Result has 230 places, 255 transitions, 1245 flow [2022-07-13 21:53:30,999 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1245, PETRI_PLACES=230, PETRI_TRANSITIONS=255} [2022-07-13 21:53:31,004 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 88 predicate places. [2022-07-13 21:53:31,004 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 255 transitions, 1245 flow [2022-07-13 21:53:31,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:31,006 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:31,006 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:31,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:53:31,007 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:53:31,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:31,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1028678017, now seen corresponding path program 2 times [2022-07-13 21:53:31,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:31,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277989491] [2022-07-13 21:53:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:31,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:31,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:31,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277989491] [2022-07-13 21:53:31,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277989491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:31,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:31,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-13 21:53:31,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908086089] [2022-07-13 21:53:31,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:31,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 21:53:31,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:31,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 21:53:31,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2022-07-13 21:53:31,832 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-07-13 21:53:31,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 255 transitions, 1245 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:31,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:31,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-07-13 21:53:31,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:36,949 INFO L129 PetriNetUnfolder]: 2297/6564 cut-off events. [2022-07-13 21:53:36,950 INFO L130 PetriNetUnfolder]: For 8315/8318 co-relation queries the response was YES. [2022-07-13 21:53:36,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16910 conditions, 6564 events. 2297/6564 cut-off events. For 8315/8318 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 50226 event pairs, 433 based on Foata normal form. 18/6299 useless extension candidates. Maximal degree in co-relation 16870. Up to 2347 conditions per place. [2022-07-13 21:53:37,018 INFO L132 encePairwiseOnDemand]: 125/158 looper letters, 367 selfloop transitions, 116 changer transitions 1/555 dead transitions. [2022-07-13 21:53:37,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 555 transitions, 3917 flow [2022-07-13 21:53:37,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 21:53:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-13 21:53:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3117 transitions. [2022-07-13 21:53:37,026 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5331850838179952 [2022-07-13 21:53:37,026 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3117 transitions. [2022-07-13 21:53:37,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3117 transitions. [2022-07-13 21:53:37,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:37,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3117 transitions. [2022-07-13 21:53:37,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 84.24324324324324) internal successors, (3117), 37 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:37,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 158.0) internal successors, (6004), 38 states have internal predecessors, (6004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:37,044 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 158.0) internal successors, (6004), 38 states have internal predecessors, (6004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:37,044 INFO L186 Difference]: Start difference. First operand has 230 places, 255 transitions, 1245 flow. Second operand 37 states and 3117 transitions. [2022-07-13 21:53:37,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 555 transitions, 3917 flow [2022-07-13 21:53:37,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 555 transitions, 3890 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-07-13 21:53:37,078 INFO L242 Difference]: Finished difference. Result has 283 places, 326 transitions, 2220 flow [2022-07-13 21:53:37,079 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2220, PETRI_PLACES=283, PETRI_TRANSITIONS=326} [2022-07-13 21:53:37,082 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 141 predicate places. [2022-07-13 21:53:37,082 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 326 transitions, 2220 flow [2022-07-13 21:53:37,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:37,083 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:37,083 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:37,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:53:37,084 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:53:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:37,085 INFO L85 PathProgramCache]: Analyzing trace with hash 386609675, now seen corresponding path program 3 times [2022-07-13 21:53:37,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:37,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708566665] [2022-07-13 21:53:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:37,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:37,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:37,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708566665] [2022-07-13 21:53:37,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708566665] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:37,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:37,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-07-13 21:53:37,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93687817] [2022-07-13 21:53:37,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:37,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 21:53:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 21:53:37,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-07-13 21:53:37,718 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 158 [2022-07-13 21:53:37,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 326 transitions, 2220 flow. Second operand has 25 states, 25 states have (on average 81.08) internal successors, (2027), 25 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:37,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:37,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 158 [2022-07-13 21:53:37,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:43,058 INFO L129 PetriNetUnfolder]: 2442/7287 cut-off events. [2022-07-13 21:53:43,059 INFO L130 PetriNetUnfolder]: For 22087/22240 co-relation queries the response was YES. [2022-07-13 21:53:43,105 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23478 conditions, 7287 events. 2442/7287 cut-off events. For 22087/22240 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 60567 event pairs, 641 based on Foata normal form. 71/7097 useless extension candidates. Maximal degree in co-relation 23415. Up to 2662 conditions per place. [2022-07-13 21:53:43,137 INFO L132 encePairwiseOnDemand]: 129/158 looper letters, 403 selfloop transitions, 154 changer transitions 14/650 dead transitions. [2022-07-13 21:53:43,137 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 650 transitions, 5727 flow [2022-07-13 21:53:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 21:53:43,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-13 21:53:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3356 transitions. [2022-07-13 21:53:43,146 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.558960692871419 [2022-07-13 21:53:43,146 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3356 transitions. [2022-07-13 21:53:43,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3356 transitions. [2022-07-13 21:53:43,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:43,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3356 transitions. [2022-07-13 21:53:43,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 88.3157894736842) internal successors, (3356), 38 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:43,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 158.0) internal successors, (6162), 39 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:43,164 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 158.0) internal successors, (6162), 39 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:43,165 INFO L186 Difference]: Start difference. First operand has 283 places, 326 transitions, 2220 flow. Second operand 38 states and 3356 transitions. [2022-07-13 21:53:43,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 650 transitions, 5727 flow [2022-07-13 21:53:43,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 650 transitions, 5477 flow, removed 96 selfloop flow, removed 8 redundant places. [2022-07-13 21:53:43,267 INFO L242 Difference]: Finished difference. Result has 340 places, 442 transitions, 3821 flow [2022-07-13 21:53:43,268 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3821, PETRI_PLACES=340, PETRI_TRANSITIONS=442} [2022-07-13 21:53:43,271 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 198 predicate places. [2022-07-13 21:53:43,271 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 442 transitions, 3821 flow [2022-07-13 21:53:43,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.08) internal successors, (2027), 25 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:43,272 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:43,273 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:43,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:53:43,273 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:53:43,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:43,274 INFO L85 PathProgramCache]: Analyzing trace with hash -272440345, now seen corresponding path program 4 times [2022-07-13 21:53:43,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:43,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492322972] [2022-07-13 21:53:43,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:43,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:43,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:43,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492322972] [2022-07-13 21:53:43,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492322972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:43,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:43,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-13 21:53:43,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040268287] [2022-07-13 21:53:43,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:43,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 21:53:43,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:43,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 21:53:43,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-07-13 21:53:43,956 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-07-13 21:53:43,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 442 transitions, 3821 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:43,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:43,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-07-13 21:53:43,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:51,770 INFO L129 PetriNetUnfolder]: 3780/10283 cut-off events. [2022-07-13 21:53:51,771 INFO L130 PetriNetUnfolder]: For 52525/52534 co-relation queries the response was YES. [2022-07-13 21:53:51,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37037 conditions, 10283 events. 3780/10283 cut-off events. For 52525/52534 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 86252 event pairs, 937 based on Foata normal form. 20/9845 useless extension candidates. Maximal degree in co-relation 36946. Up to 4127 conditions per place. [2022-07-13 21:53:51,907 INFO L132 encePairwiseOnDemand]: 125/158 looper letters, 628 selfloop transitions, 206 changer transitions 1/906 dead transitions. [2022-07-13 21:53:51,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 906 transitions, 9389 flow [2022-07-13 21:53:51,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-13 21:53:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-13 21:53:51,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4345 transitions. [2022-07-13 21:53:51,914 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5288461538461539 [2022-07-13 21:53:51,914 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4345 transitions. [2022-07-13 21:53:51,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4345 transitions. [2022-07-13 21:53:51,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:51,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4345 transitions. [2022-07-13 21:53:51,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 83.5576923076923) internal successors, (4345), 52 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:51,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 158.0) internal successors, (8374), 53 states have internal predecessors, (8374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:51,936 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 158.0) internal successors, (8374), 53 states have internal predecessors, (8374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:51,936 INFO L186 Difference]: Start difference. First operand has 340 places, 442 transitions, 3821 flow. Second operand 52 states and 4345 transitions. [2022-07-13 21:53:51,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 906 transitions, 9389 flow [2022-07-13 21:53:52,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 906 transitions, 8801 flow, removed 273 selfloop flow, removed 8 redundant places. [2022-07-13 21:53:52,212 INFO L242 Difference]: Finished difference. Result has 422 places, 558 transitions, 5495 flow [2022-07-13 21:53:52,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3530, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5495, PETRI_PLACES=422, PETRI_TRANSITIONS=558} [2022-07-13 21:53:52,213 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 280 predicate places. [2022-07-13 21:53:52,213 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 558 transitions, 5495 flow [2022-07-13 21:53:52,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:52,215 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:52,215 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:52,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:53:52,215 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:53:52,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:52,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2018981907, now seen corresponding path program 5 times [2022-07-13 21:53:52,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:52,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257605945] [2022-07-13 21:53:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:52,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:52,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:52,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257605945] [2022-07-13 21:53:52,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257605945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:52,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:52,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-07-13 21:53:52,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103465669] [2022-07-13 21:53:52,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:52,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 21:53:52,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:52,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 21:53:52,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-07-13 21:53:52,765 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 158 [2022-07-13 21:53:52,767 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 558 transitions, 5495 flow. Second operand has 25 states, 25 states have (on average 81.08) internal successors, (2027), 25 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:52,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:52,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 158 [2022-07-13 21:53:52,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:59,414 INFO L129 PetriNetUnfolder]: 3051/8965 cut-off events. [2022-07-13 21:53:59,414 INFO L130 PetriNetUnfolder]: For 68934/69174 co-relation queries the response was YES. [2022-07-13 21:53:59,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35628 conditions, 8965 events. 3051/8965 cut-off events. For 68934/69174 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 78821 event pairs, 695 based on Foata normal form. 96/8759 useless extension candidates. Maximal degree in co-relation 35498. Up to 2575 conditions per place. [2022-07-13 21:53:59,533 INFO L132 encePairwiseOnDemand]: 129/158 looper letters, 483 selfloop transitions, 297 changer transitions 13/906 dead transitions. [2022-07-13 21:53:59,533 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 906 transitions, 10356 flow [2022-07-13 21:53:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-13 21:53:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-13 21:53:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3496 transitions. [2022-07-13 21:53:59,538 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5531645569620253 [2022-07-13 21:53:59,538 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3496 transitions. [2022-07-13 21:53:59,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3496 transitions. [2022-07-13 21:53:59,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:59,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3496 transitions. [2022-07-13 21:53:59,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 87.4) internal successors, (3496), 40 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:59,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 158.0) internal successors, (6478), 41 states have internal predecessors, (6478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:59,552 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 158.0) internal successors, (6478), 41 states have internal predecessors, (6478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:59,552 INFO L186 Difference]: Start difference. First operand has 422 places, 558 transitions, 5495 flow. Second operand 40 states and 3496 transitions. [2022-07-13 21:53:59,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 906 transitions, 10356 flow [2022-07-13 21:53:59,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 906 transitions, 9530 flow, removed 278 selfloop flow, removed 11 redundant places. [2022-07-13 21:53:59,898 INFO L242 Difference]: Finished difference. Result has 479 places, 641 transitions, 7061 flow [2022-07-13 21:53:59,899 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=4887, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=7061, PETRI_PLACES=479, PETRI_TRANSITIONS=641} [2022-07-13 21:53:59,901 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 337 predicate places. [2022-07-13 21:53:59,901 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 641 transitions, 7061 flow [2022-07-13 21:53:59,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.08) internal successors, (2027), 25 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:59,902 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:59,902 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:59,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:53:59,903 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:53:59,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:59,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1798415853, now seen corresponding path program 6 times [2022-07-13 21:53:59,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:59,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998570205] [2022-07-13 21:53:59,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:59,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:00,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:00,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998570205] [2022-07-13 21:54:00,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998570205] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:00,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:00,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-13 21:54:00,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535987192] [2022-07-13 21:54:00,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:00,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 21:54:00,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:00,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 21:54:00,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2022-07-13 21:54:00,628 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-07-13 21:54:00,629 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 641 transitions, 7061 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:00,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:00,630 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-07-13 21:54:00,630 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:08,262 INFO L129 PetriNetUnfolder]: 4564/12290 cut-off events. [2022-07-13 21:54:08,262 INFO L130 PetriNetUnfolder]: For 137254/137272 co-relation queries the response was YES. [2022-07-13 21:54:08,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54680 conditions, 12290 events. 4564/12290 cut-off events. For 137254/137272 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 107622 event pairs, 1170 based on Foata normal form. 23/11777 useless extension candidates. Maximal degree in co-relation 54521. Up to 5044 conditions per place. [2022-07-13 21:54:08,468 INFO L132 encePairwiseOnDemand]: 125/158 looper letters, 751 selfloop transitions, 237 changer transitions 1/1060 dead transitions. [2022-07-13 21:54:08,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 1060 transitions, 14648 flow [2022-07-13 21:54:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 21:54:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-13 21:54:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3223 transitions. [2022-07-13 21:54:08,485 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5368087941372418 [2022-07-13 21:54:08,485 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3223 transitions. [2022-07-13 21:54:08,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3223 transitions. [2022-07-13 21:54:08,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:08,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3223 transitions. [2022-07-13 21:54:08,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 84.8157894736842) internal successors, (3223), 38 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 158.0) internal successors, (6162), 39 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,509 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 158.0) internal successors, (6162), 39 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,509 INFO L186 Difference]: Start difference. First operand has 479 places, 641 transitions, 7061 flow. Second operand 38 states and 3223 transitions. [2022-07-13 21:54:08,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 1060 transitions, 14648 flow [2022-07-13 21:54:09,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 1060 transitions, 14221 flow, removed 142 selfloop flow, removed 10 redundant places. [2022-07-13 21:54:09,241 INFO L242 Difference]: Finished difference. Result has 530 places, 710 transitions, 8793 flow [2022-07-13 21:54:09,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=6716, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8793, PETRI_PLACES=530, PETRI_TRANSITIONS=710} [2022-07-13 21:54:09,243 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 388 predicate places. [2022-07-13 21:54:09,243 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 710 transitions, 8793 flow [2022-07-13 21:54:09,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:09,244 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:09,244 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:54:09,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 21:54:09,244 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:54:09,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:09,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1882222283, now seen corresponding path program 7 times [2022-07-13 21:54:09,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:09,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504062429] [2022-07-13 21:54:09,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:09,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:09,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:09,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504062429] [2022-07-13 21:54:09,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504062429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:09,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:09,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-13 21:54:09,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552932928] [2022-07-13 21:54:09,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:09,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 21:54:09,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:09,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 21:54:09,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-07-13 21:54:09,863 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-07-13 21:54:09,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 710 transitions, 8793 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:09,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:09,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-07-13 21:54:09,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:20,093 INFO L129 PetriNetUnfolder]: 5116/13437 cut-off events. [2022-07-13 21:54:20,093 INFO L130 PetriNetUnfolder]: For 193654/193677 co-relation queries the response was YES. [2022-07-13 21:54:20,275 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65680 conditions, 13437 events. 5116/13437 cut-off events. For 193654/193677 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 118550 event pairs, 1471 based on Foata normal form. 32/12907 useless extension candidates. Maximal degree in co-relation 65498. Up to 5629 conditions per place. [2022-07-13 21:54:20,315 INFO L132 encePairwiseOnDemand]: 125/158 looper letters, 801 selfloop transitions, 279 changer transitions 20/1171 dead transitions. [2022-07-13 21:54:20,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 1171 transitions, 16291 flow [2022-07-13 21:54:20,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-13 21:54:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-13 21:54:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4435 transitions. [2022-07-13 21:54:20,321 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5398003894839338 [2022-07-13 21:54:20,321 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4435 transitions. [2022-07-13 21:54:20,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4435 transitions. [2022-07-13 21:54:20,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:20,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4435 transitions. [2022-07-13 21:54:20,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 85.28846153846153) internal successors, (4435), 52 states have internal predecessors, (4435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:20,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 158.0) internal successors, (8374), 53 states have internal predecessors, (8374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:20,338 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 158.0) internal successors, (8374), 53 states have internal predecessors, (8374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:20,338 INFO L186 Difference]: Start difference. First operand has 530 places, 710 transitions, 8793 flow. Second operand 52 states and 4435 transitions. [2022-07-13 21:54:20,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 1171 transitions, 16291 flow [2022-07-13 21:54:21,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 1171 transitions, 15573 flow, removed 265 selfloop flow, removed 10 redundant places. [2022-07-13 21:54:21,187 INFO L242 Difference]: Finished difference. Result has 602 places, 814 transitions, 10871 flow [2022-07-13 21:54:21,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=8193, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=10871, PETRI_PLACES=602, PETRI_TRANSITIONS=814} [2022-07-13 21:54:21,189 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 460 predicate places. [2022-07-13 21:54:21,189 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 814 transitions, 10871 flow [2022-07-13 21:54:21,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:21,190 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:21,190 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:54:21,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 21:54:21,191 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:54:21,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:21,191 INFO L85 PathProgramCache]: Analyzing trace with hash -372240893, now seen corresponding path program 8 times [2022-07-13 21:54:21,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:21,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111125771] [2022-07-13 21:54:21,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:21,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:21,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:21,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111125771] [2022-07-13 21:54:21,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111125771] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:21,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:21,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-13 21:54:21,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882909829] [2022-07-13 21:54:21,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:21,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 21:54:21,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:21,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 21:54:21,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2022-07-13 21:54:21,829 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-07-13 21:54:21,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 814 transitions, 10871 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:21,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:21,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-07-13 21:54:21,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:31,378 INFO L129 PetriNetUnfolder]: 5839/15559 cut-off events. [2022-07-13 21:54:31,378 INFO L130 PetriNetUnfolder]: For 284767/284795 co-relation queries the response was YES. [2022-07-13 21:54:31,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80509 conditions, 15559 events. 5839/15559 cut-off events. For 284767/284795 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 142983 event pairs, 1514 based on Foata normal form. 25/14910 useless extension candidates. Maximal degree in co-relation 80296. Up to 6796 conditions per place. [2022-07-13 21:54:31,743 INFO L132 encePairwiseOnDemand]: 125/158 looper letters, 945 selfloop transitions, 228 changer transitions 1/1245 dead transitions. [2022-07-13 21:54:31,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 1245 transitions, 19252 flow [2022-07-13 21:54:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 21:54:31,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-13 21:54:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3495 transitions. [2022-07-13 21:54:31,748 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.539518369867243 [2022-07-13 21:54:31,748 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3495 transitions. [2022-07-13 21:54:31,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3495 transitions. [2022-07-13 21:54:31,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:31,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3495 transitions. [2022-07-13 21:54:31,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 85.2439024390244) internal successors, (3495), 41 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:31,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 158.0) internal successors, (6636), 42 states have internal predecessors, (6636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:31,762 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 158.0) internal successors, (6636), 42 states have internal predecessors, (6636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:31,763 INFO L186 Difference]: Start difference. First operand has 602 places, 814 transitions, 10871 flow. Second operand 41 states and 3495 transitions. [2022-07-13 21:54:31,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 1245 transitions, 19252 flow [2022-07-13 21:54:33,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 633 places, 1245 transitions, 18651 flow, removed 224 selfloop flow, removed 9 redundant places. [2022-07-13 21:54:33,235 INFO L242 Difference]: Finished difference. Result has 663 places, 907 transitions, 13112 flow [2022-07-13 21:54:33,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=10316, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=13112, PETRI_PLACES=663, PETRI_TRANSITIONS=907} [2022-07-13 21:54:33,237 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 521 predicate places. [2022-07-13 21:54:33,237 INFO L495 AbstractCegarLoop]: Abstraction has has 663 places, 907 transitions, 13112 flow [2022-07-13 21:54:33,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:33,238 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:33,238 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:54:33,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:54:33,238 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:54:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:33,239 INFO L85 PathProgramCache]: Analyzing trace with hash -410028145, now seen corresponding path program 9 times [2022-07-13 21:54:33,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:33,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197765338] [2022-07-13 21:54:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:33,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:33,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:33,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197765338] [2022-07-13 21:54:33,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197765338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:33,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:33,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-13 21:54:33,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334422573] [2022-07-13 21:54:33,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:33,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 21:54:33,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:33,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 21:54:33,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-07-13 21:54:33,865 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-07-13 21:54:33,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 663 places, 907 transitions, 13112 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:33,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:33,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-07-13 21:54:33,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:45,382 INFO L129 PetriNetUnfolder]: 6433/16950 cut-off events. [2022-07-13 21:54:45,382 INFO L130 PetriNetUnfolder]: For 384785/384826 co-relation queries the response was YES. [2022-07-13 21:54:45,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95473 conditions, 16950 events. 6433/16950 cut-off events. For 384785/384826 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 158159 event pairs, 1638 based on Foata normal form. 37/16296 useless extension candidates. Maximal degree in co-relation 95230. Up to 7556 conditions per place. [2022-07-13 21:54:45,783 INFO L132 encePairwiseOnDemand]: 125/158 looper letters, 983 selfloop transitions, 240 changer transitions 15/1309 dead transitions. [2022-07-13 21:54:45,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 709 places, 1309 transitions, 21388 flow [2022-07-13 21:54:45,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-13 21:54:45,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-13 21:54:45,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3993 transitions. [2022-07-13 21:54:45,787 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5377053595475357 [2022-07-13 21:54:45,787 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3993 transitions. [2022-07-13 21:54:45,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3993 transitions. [2022-07-13 21:54:45,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:45,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3993 transitions. [2022-07-13 21:54:45,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 84.95744680851064) internal successors, (3993), 47 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:45,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 158.0) internal successors, (7584), 48 states have internal predecessors, (7584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:45,800 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 158.0) internal successors, (7584), 48 states have internal predecessors, (7584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:45,801 INFO L186 Difference]: Start difference. First operand has 663 places, 907 transitions, 13112 flow. Second operand 47 states and 3993 transitions. [2022-07-13 21:54:45,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 709 places, 1309 transitions, 21388 flow [2022-07-13 21:54:47,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 1309 transitions, 20150 flow, removed 556 selfloop flow, removed 9 redundant places. [2022-07-13 21:54:47,718 INFO L242 Difference]: Finished difference. Result has 733 places, 1007 transitions, 15112 flow [2022-07-13 21:54:47,719 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=12141, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=907, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=15112, PETRI_PLACES=733, PETRI_TRANSITIONS=1007} [2022-07-13 21:54:47,719 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 591 predicate places. [2022-07-13 21:54:47,719 INFO L495 AbstractCegarLoop]: Abstraction has has 733 places, 1007 transitions, 15112 flow [2022-07-13 21:54:47,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:47,720 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:47,720 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:54:47,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:54:47,721 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:54:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:47,721 INFO L85 PathProgramCache]: Analyzing trace with hash -38733587, now seen corresponding path program 10 times [2022-07-13 21:54:47,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:47,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233289677] [2022-07-13 21:54:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:47,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:48,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:48,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233289677] [2022-07-13 21:54:48,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233289677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:48,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:48,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-13 21:54:48,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828632020] [2022-07-13 21:54:48,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:48,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 21:54:48,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:48,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 21:54:48,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-07-13 21:54:48,270 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-07-13 21:54:48,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 1007 transitions, 15112 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:48,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:48,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-07-13 21:54:48,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:55:02,176 INFO L129 PetriNetUnfolder]: 7016/18479 cut-off events. [2022-07-13 21:55:02,176 INFO L130 PetriNetUnfolder]: For 501567/501610 co-relation queries the response was YES. [2022-07-13 21:55:02,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107684 conditions, 18479 events. 7016/18479 cut-off events. For 501567/501610 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 175793 event pairs, 2075 based on Foata normal form. 29/17699 useless extension candidates. Maximal degree in co-relation 107408. Up to 8037 conditions per place. [2022-07-13 21:55:02,809 INFO L132 encePairwiseOnDemand]: 125/158 looper letters, 1115 selfloop transitions, 338 changer transitions 3/1527 dead transitions. [2022-07-13 21:55:02,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 1527 transitions, 26741 flow [2022-07-13 21:55:02,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-13 21:55:02,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-13 21:55:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3951 transitions. [2022-07-13 21:55:02,813 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5320495556154053 [2022-07-13 21:55:02,813 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3951 transitions. [2022-07-13 21:55:02,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3951 transitions. [2022-07-13 21:55:02,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:55:02,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3951 transitions. [2022-07-13 21:55:02,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 84.06382978723404) internal successors, (3951), 47 states have internal predecessors, (3951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:02,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 158.0) internal successors, (7584), 48 states have internal predecessors, (7584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:02,825 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 158.0) internal successors, (7584), 48 states have internal predecessors, (7584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:02,825 INFO L186 Difference]: Start difference. First operand has 733 places, 1007 transitions, 15112 flow. Second operand 47 states and 3951 transitions. [2022-07-13 21:55:02,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 779 places, 1527 transitions, 26741 flow [2022-07-13 21:55:05,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 1527 transitions, 25959 flow, removed 309 selfloop flow, removed 9 redundant places. [2022-07-13 21:55:05,773 INFO L242 Difference]: Finished difference. Result has 804 places, 1112 transitions, 18264 flow [2022-07-13 21:55:05,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=14363, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=18264, PETRI_PLACES=804, PETRI_TRANSITIONS=1112} [2022-07-13 21:55:05,774 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 662 predicate places. [2022-07-13 21:55:05,775 INFO L495 AbstractCegarLoop]: Abstraction has has 804 places, 1112 transitions, 18264 flow [2022-07-13 21:55:05,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:05,775 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:55:05,775 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:55:05,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 21:55:05,776 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-13 21:55:05,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:55:05,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1101197857, now seen corresponding path program 11 times [2022-07-13 21:55:05,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:55:05,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794350475] [2022-07-13 21:55:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:55:05,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:55:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:55:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:55:06,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:55:06,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794350475] [2022-07-13 21:55:06,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794350475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:55:06,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:55:06,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-13 21:55:06,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460051193] [2022-07-13 21:55:06,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:55:06,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 21:55:06,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:55:06,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 21:55:06,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2022-07-13 21:55:06,469 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-07-13 21:55:06,470 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 804 places, 1112 transitions, 18264 flow. Second operand has 27 states, 27 states have (on average 77.0) internal successors, (2079), 27 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:55:06,470 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:55:06,470 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-07-13 21:55:06,470 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand