./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-races/race-3_2-container_of-global.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/ldv-races/race-3_2-container_of-global.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 02b1c265b98bd14cc97fe77543b4e06699576e2091fa3d4102d013e6b3937418 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:51:12,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:51:12,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:51:12,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:51:12,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:51:12,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:51:12,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:51:12,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:51:12,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:51:12,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:51:12,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:51:12,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:51:12,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:51:12,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:51:12,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:51:12,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:51:12,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:51:12,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:51:12,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:51:12,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:51:12,949 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:51:12,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:51:12,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:51:12,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:51:12,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:51:12,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:51:12,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:51:12,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:51:12,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:51:12,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:51:12,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:51:12,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:51:12,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:51:12,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:51:12,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:51:12,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:51:12,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:51:12,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:51:12,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:51:12,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:51:12,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:51:12,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:51:12,966 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:51:12,992 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:51:12,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:51:12,994 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:51:12,994 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:51:12,995 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:51:12,995 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:51:12,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:51:12,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:51:12,996 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:51:12,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:51:12,997 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:51:12,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:51:12,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:51:12,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:51:12,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:51:12,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:51:12,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:51:12,998 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:51:12,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:51:12,999 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:51:12,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:51:12,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:51:13,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:51:13,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:51:13,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:51:13,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:51:13,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:51:13,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:51:13,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:51:13,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:51:13,001 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:51:13,002 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:51:13,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:51:13,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02b1c265b98bd14cc97fe77543b4e06699576e2091fa3d4102d013e6b3937418 [2022-07-13 21:51:13,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:51:13,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:51:13,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:51:13,223 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:51:13,223 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:51:13,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-races/race-3_2-container_of-global.i [2022-07-13 21:51:13,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5c617fbe/c771dff7a2ef44f297f040a0f8acc9ed/FLAGe4bfd8c25 [2022-07-13 21:51:13,792 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:51:13,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-races/race-3_2-container_of-global.i [2022-07-13 21:51:13,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5c617fbe/c771dff7a2ef44f297f040a0f8acc9ed/FLAGe4bfd8c25 [2022-07-13 21:51:14,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5c617fbe/c771dff7a2ef44f297f040a0f8acc9ed [2022-07-13 21:51:14,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:51:14,254 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:51:14,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:51:14,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:51:14,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:51:14,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:51:14" (1/1) ... [2022-07-13 21:51:14,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb578f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:14, skipping insertion in model container [2022-07-13 21:51:14,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:51:14" (1/1) ... [2022-07-13 21:51:14,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:51:14,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:51:14,421 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-13 21:51:14,693 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/ldv-races/race-3_2-container_of-global.i[75009,75022] [2022-07-13 21:51:14,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:51:14,731 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:51:14,739 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-13 21:51:14,776 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/ldv-races/race-3_2-container_of-global.i[75009,75022] [2022-07-13 21:51:14,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:51:14,866 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:51:14,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:14 WrapperNode [2022-07-13 21:51:14,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:51:14,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:51:14,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:51:14,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:51:14,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:14" (1/1) ... [2022-07-13 21:51:14,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:14" (1/1) ... [2022-07-13 21:51:14,923 INFO L137 Inliner]: procedures = 468, calls = 52, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 134 [2022-07-13 21:51:14,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:51:14,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:51:14,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:51:14,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:51:14,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:14" (1/1) ... [2022-07-13 21:51:14,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:14" (1/1) ... [2022-07-13 21:51:14,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:14" (1/1) ... [2022-07-13 21:51:14,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:14" (1/1) ... [2022-07-13 21:51:14,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:14" (1/1) ... [2022-07-13 21:51:14,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:14" (1/1) ... [2022-07-13 21:51:14,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:14" (1/1) ... [2022-07-13 21:51:14,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:51:14,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:51:14,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:51:14,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:51:14,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:14" (1/1) ... [2022-07-13 21:51:14,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:51:14,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:51:14,977 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 21:51:14,981 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 21:51:15,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 21:51:15,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:51:15,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 21:51:15,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:51:15,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:51:15,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 21:51:15,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:51:15,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:51:15,006 INFO L130 BoogieDeclarations]: Found specification of procedure my_callback [2022-07-13 21:51:15,007 INFO L138 BoogieDeclarations]: Found implementation of procedure my_callback [2022-07-13 21:51:15,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:51:15,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:51:15,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:51:15,021 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 21:51:15,285 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:51:15,287 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:51:15,517 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:51:15,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:51:15,529 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 21:51:15,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:51:15 BoogieIcfgContainer [2022-07-13 21:51:15,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:51:15,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:51:15,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:51:15,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:51:15,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:51:14" (1/3) ... [2022-07-13 21:51:15,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f604582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:51:15, skipping insertion in model container [2022-07-13 21:51:15,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:14" (2/3) ... [2022-07-13 21:51:15,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f604582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:51:15, skipping insertion in model container [2022-07-13 21:51:15,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:51:15" (3/3) ... [2022-07-13 21:51:15,536 INFO L111 eAbstractionObserver]: Analyzing ICFG race-3_2-container_of-global.i [2022-07-13 21:51:15,539 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:51:15,545 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:51:15,545 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-07-13 21:51:15,545 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:51:15,610 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:51:15,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 184 places, 186 transitions, 388 flow [2022-07-13 21:51:15,683 INFO L129 PetriNetUnfolder]: 10/231 cut-off events. [2022-07-13 21:51:15,683 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:51:15,686 INFO L84 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 231 events. 10/231 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 334 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 137. Up to 4 conditions per place. [2022-07-13 21:51:15,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 186 transitions, 388 flow [2022-07-13 21:51:15,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 172 transitions, 356 flow [2022-07-13 21:51:15,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:51:15,701 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@44b8ff6d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@24bcf47f [2022-07-13 21:51:15,702 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-13 21:51:15,707 INFO L129 PetriNetUnfolder]: 0/45 cut-off events. [2022-07-13 21:51:15,707 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:51:15,707 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:15,708 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] [2022-07-13 21:51:15,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:15,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:15,712 INFO L85 PathProgramCache]: Analyzing trace with hash -34102460, now seen corresponding path program 1 times [2022-07-13 21:51:15,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:15,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709771910] [2022-07-13 21:51:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:15,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:16,093 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 21:51:16,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:16,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709771910] [2022-07-13 21:51:16,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709771910] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:16,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:16,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:51:16,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381338107] [2022-07-13 21:51:16,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:16,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:51:16,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:16,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:51:16,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:51:16,130 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 186 [2022-07-13 21:51:16,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 172 transitions, 356 flow. Second operand has 6 states, 6 states have (on average 111.33333333333333) internal successors, (668), 6 states have internal predecessors, (668), 0 states have call successors, (0), 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 21:51:16,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:16,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 186 [2022-07-13 21:51:16,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:16,439 INFO L129 PetriNetUnfolder]: 361/947 cut-off events. [2022-07-13 21:51:16,439 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 21:51:16,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1638 conditions, 947 events. 361/947 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4956 event pairs, 216 based on Foata normal form. 20/912 useless extension candidates. Maximal degree in co-relation 1391. Up to 397 conditions per place. [2022-07-13 21:51:16,447 INFO L132 encePairwiseOnDemand]: 164/186 looper letters, 53 selfloop transitions, 17 changer transitions 1/168 dead transitions. [2022-07-13 21:51:16,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 168 transitions, 490 flow [2022-07-13 21:51:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:51:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:51:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1057 transitions. [2022-07-13 21:51:16,460 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6314217443249701 [2022-07-13 21:51:16,460 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1057 transitions. [2022-07-13 21:51:16,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1057 transitions. [2022-07-13 21:51:16,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:16,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1057 transitions. [2022-07-13 21:51:16,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 117.44444444444444) internal successors, (1057), 9 states have internal predecessors, (1057), 0 states have call successors, (0), 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 21:51:16,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 186.0) internal successors, (1860), 10 states have internal predecessors, (1860), 0 states have call successors, (0), 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 21:51:16,513 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 186.0) internal successors, (1860), 10 states have internal predecessors, (1860), 0 states have call successors, (0), 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 21:51:16,515 INFO L186 Difference]: Start difference. First operand has 172 places, 172 transitions, 356 flow. Second operand 9 states and 1057 transitions. [2022-07-13 21:51:16,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 168 transitions, 490 flow [2022-07-13 21:51:16,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 168 transitions, 482 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 21:51:16,521 INFO L242 Difference]: Finished difference. Result has 170 places, 161 transitions, 367 flow [2022-07-13 21:51:16,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=367, PETRI_PLACES=170, PETRI_TRANSITIONS=161} [2022-07-13 21:51:16,525 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, -2 predicate places. [2022-07-13 21:51:16,525 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 161 transitions, 367 flow [2022-07-13 21:51:16,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.33333333333333) internal successors, (668), 6 states have internal predecessors, (668), 0 states have call successors, (0), 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 21:51:16,526 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:16,526 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] [2022-07-13 21:51:16,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:51:16,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:16,528 INFO L85 PathProgramCache]: Analyzing trace with hash -888642596, now seen corresponding path program 1 times [2022-07-13 21:51:16,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:16,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126261985] [2022-07-13 21:51:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:16,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:16,634 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 21:51:16,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:16,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126261985] [2022-07-13 21:51:16,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126261985] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:16,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:16,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:51:16,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929471065] [2022-07-13 21:51:16,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:16,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:51:16,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:16,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:51:16,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:51:16,642 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 186 [2022-07-13 21:51:16,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 161 transitions, 367 flow. Second operand has 6 states, 6 states have (on average 112.16666666666667) internal successors, (673), 6 states have internal predecessors, (673), 0 states have call successors, (0), 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 21:51:16,643 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:16,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 186 [2022-07-13 21:51:16,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:16,869 INFO L129 PetriNetUnfolder]: 361/951 cut-off events. [2022-07-13 21:51:16,870 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-13 21:51:16,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1719 conditions, 951 events. 361/951 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4981 event pairs, 120 based on Foata normal form. 1/917 useless extension candidates. Maximal degree in co-relation 856. Up to 261 conditions per place. [2022-07-13 21:51:16,876 INFO L132 encePairwiseOnDemand]: 167/186 looper letters, 61 selfloop transitions, 18 changer transitions 1/176 dead transitions. [2022-07-13 21:51:16,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 176 transitions, 559 flow [2022-07-13 21:51:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:51:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 21:51:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1171 transitions. [2022-07-13 21:51:16,879 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6295698924731182 [2022-07-13 21:51:16,879 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1171 transitions. [2022-07-13 21:51:16,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1171 transitions. [2022-07-13 21:51:16,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:16,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1171 transitions. [2022-07-13 21:51:16,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 117.1) internal successors, (1171), 10 states have internal predecessors, (1171), 0 states have call successors, (0), 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 21:51:16,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 186.0) internal successors, (2046), 11 states have internal predecessors, (2046), 0 states have call successors, (0), 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 21:51:16,885 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 186.0) internal successors, (2046), 11 states have internal predecessors, (2046), 0 states have call successors, (0), 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 21:51:16,885 INFO L186 Difference]: Start difference. First operand has 170 places, 161 transitions, 367 flow. Second operand 10 states and 1171 transitions. [2022-07-13 21:51:16,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 176 transitions, 559 flow [2022-07-13 21:51:16,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 176 transitions, 530 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-07-13 21:51:16,891 INFO L242 Difference]: Finished difference. Result has 171 places, 160 transitions, 378 flow [2022-07-13 21:51:16,892 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=378, PETRI_PLACES=171, PETRI_TRANSITIONS=160} [2022-07-13 21:51:16,892 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, -1 predicate places. [2022-07-13 21:51:16,892 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 160 transitions, 378 flow [2022-07-13 21:51:16,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.16666666666667) internal successors, (673), 6 states have internal predecessors, (673), 0 states have call successors, (0), 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 21:51:16,893 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:16,893 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] [2022-07-13 21:51:16,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:51:16,894 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:16,897 INFO L85 PathProgramCache]: Analyzing trace with hash -170107804, now seen corresponding path program 1 times [2022-07-13 21:51:16,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:16,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146534321] [2022-07-13 21:51:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:16,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:17,030 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 21:51:17,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:17,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146534321] [2022-07-13 21:51:17,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146534321] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:17,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:17,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:51:17,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078292289] [2022-07-13 21:51:17,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:17,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:51:17,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:17,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:51:17,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:51:17,038 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 186 [2022-07-13 21:51:17,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 160 transitions, 378 flow. Second operand has 6 states, 6 states have (on average 111.33333333333333) internal successors, (668), 6 states have internal predecessors, (668), 0 states have call successors, (0), 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 21:51:17,039 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:17,039 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 186 [2022-07-13 21:51:17,039 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:17,382 INFO L129 PetriNetUnfolder]: 832/1911 cut-off events. [2022-07-13 21:51:17,382 INFO L130 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2022-07-13 21:51:17,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 1911 events. 832/1911 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11752 event pairs, 169 based on Foata normal form. 32/1907 useless extension candidates. Maximal degree in co-relation 948. Up to 499 conditions per place. [2022-07-13 21:51:17,391 INFO L132 encePairwiseOnDemand]: 165/186 looper letters, 100 selfloop transitions, 49 changer transitions 0/245 dead transitions. [2022-07-13 21:51:17,392 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 245 transitions, 862 flow [2022-07-13 21:51:17,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 21:51:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-13 21:51:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1540 transitions. [2022-07-13 21:51:17,395 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6368899917287014 [2022-07-13 21:51:17,395 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1540 transitions. [2022-07-13 21:51:17,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1540 transitions. [2022-07-13 21:51:17,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:17,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1540 transitions. [2022-07-13 21:51:17,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 118.46153846153847) internal successors, (1540), 13 states have internal predecessors, (1540), 0 states have call successors, (0), 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 21:51:17,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 186.0) internal successors, (2604), 14 states have internal predecessors, (2604), 0 states have call successors, (0), 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 21:51:17,404 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 186.0) internal successors, (2604), 14 states have internal predecessors, (2604), 0 states have call successors, (0), 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 21:51:17,404 INFO L186 Difference]: Start difference. First operand has 171 places, 160 transitions, 378 flow. Second operand 13 states and 1540 transitions. [2022-07-13 21:51:17,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 245 transitions, 862 flow [2022-07-13 21:51:17,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 245 transitions, 816 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-13 21:51:17,413 INFO L242 Difference]: Finished difference. Result has 183 places, 197 transitions, 648 flow [2022-07-13 21:51:17,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=648, PETRI_PLACES=183, PETRI_TRANSITIONS=197} [2022-07-13 21:51:17,415 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 11 predicate places. [2022-07-13 21:51:17,415 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 197 transitions, 648 flow [2022-07-13 21:51:17,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.33333333333333) internal successors, (668), 6 states have internal predecessors, (668), 0 states have call successors, (0), 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 21:51:17,416 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:17,416 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] [2022-07-13 21:51:17,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:51:17,417 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:17,418 INFO L85 PathProgramCache]: Analyzing trace with hash 896697388, now seen corresponding path program 1 times [2022-07-13 21:51:17,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:17,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122015587] [2022-07-13 21:51:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:17,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:17,524 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 21:51:17,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:17,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122015587] [2022-07-13 21:51:17,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122015587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:17,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:17,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:51:17,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570677026] [2022-07-13 21:51:17,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:17,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:51:17,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:17,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:51:17,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:51:17,527 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 186 [2022-07-13 21:51:17,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 197 transitions, 648 flow. Second operand has 6 states, 6 states have (on average 112.16666666666667) internal successors, (673), 6 states have internal predecessors, (673), 0 states have call successors, (0), 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 21:51:17,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:17,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 186 [2022-07-13 21:51:17,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:17,928 INFO L129 PetriNetUnfolder]: 1084/2475 cut-off events. [2022-07-13 21:51:17,928 INFO L130 PetriNetUnfolder]: For 10880/10978 co-relation queries the response was YES. [2022-07-13 21:51:17,935 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8969 conditions, 2475 events. 1084/2475 cut-off events. For 10880/10978 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16565 event pairs, 218 based on Foata normal form. 47/2486 useless extension candidates. Maximal degree in co-relation 7694. Up to 732 conditions per place. [2022-07-13 21:51:17,945 INFO L132 encePairwiseOnDemand]: 167/186 looper letters, 74 selfloop transitions, 48 changer transitions 69/286 dead transitions. [2022-07-13 21:51:17,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 286 transitions, 1732 flow [2022-07-13 21:51:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:51:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:51:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1307 transitions. [2022-07-13 21:51:17,948 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6388074291300098 [2022-07-13 21:51:17,948 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1307 transitions. [2022-07-13 21:51:17,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1307 transitions. [2022-07-13 21:51:17,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:17,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1307 transitions. [2022-07-13 21:51:17,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 118.81818181818181) internal successors, (1307), 11 states have internal predecessors, (1307), 0 states have call successors, (0), 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 21:51:17,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 186.0) internal successors, (2232), 12 states have internal predecessors, (2232), 0 states have call successors, (0), 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 21:51:17,954 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 186.0) internal successors, (2232), 12 states have internal predecessors, (2232), 0 states have call successors, (0), 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 21:51:17,954 INFO L186 Difference]: Start difference. First operand has 183 places, 197 transitions, 648 flow. Second operand 11 states and 1307 transitions. [2022-07-13 21:51:17,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 286 transitions, 1732 flow [2022-07-13 21:51:17,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 286 transitions, 1732 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:51:17,969 INFO L242 Difference]: Finished difference. Result has 201 places, 203 transitions, 961 flow [2022-07-13 21:51:17,970 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=961, PETRI_PLACES=201, PETRI_TRANSITIONS=203} [2022-07-13 21:51:17,970 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 29 predicate places. [2022-07-13 21:51:17,971 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 203 transitions, 961 flow [2022-07-13 21:51:17,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.16666666666667) internal successors, (673), 6 states have internal predecessors, (673), 0 states have call successors, (0), 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 21:51:17,971 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:17,971 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] [2022-07-13 21:51:17,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:51:17,972 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:17,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:17,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1717393044, now seen corresponding path program 1 times [2022-07-13 21:51:17,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:17,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993790652] [2022-07-13 21:51:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:17,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:18,078 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 21:51:18,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:18,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993790652] [2022-07-13 21:51:18,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993790652] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:18,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:18,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:51:18,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677798971] [2022-07-13 21:51:18,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:18,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:51:18,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:18,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:51:18,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:51:18,082 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 186 [2022-07-13 21:51:18,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 203 transitions, 961 flow. Second operand has 5 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 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 21:51:18,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:18,083 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 186 [2022-07-13 21:51:18,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:18,146 INFO L129 PetriNetUnfolder]: 46/285 cut-off events. [2022-07-13 21:51:18,146 INFO L130 PetriNetUnfolder]: For 736/796 co-relation queries the response was YES. [2022-07-13 21:51:18,147 INFO L84 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 285 events. 46/285 cut-off events. For 736/796 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 949 event pairs, 10 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 629. Up to 31 conditions per place. [2022-07-13 21:51:18,148 INFO L132 encePairwiseOnDemand]: 181/186 looper letters, 19 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2022-07-13 21:51:18,148 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 139 transitions, 456 flow [2022-07-13 21:51:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 21:51:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 21:51:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 966 transitions. [2022-07-13 21:51:18,150 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8655913978494624 [2022-07-13 21:51:18,151 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 966 transitions. [2022-07-13 21:51:18,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 966 transitions. [2022-07-13 21:51:18,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:18,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 966 transitions. [2022-07-13 21:51:18,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 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 21:51:18,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 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 21:51:18,154 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 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 21:51:18,154 INFO L186 Difference]: Start difference. First operand has 201 places, 203 transitions, 961 flow. Second operand 6 states and 966 transitions. [2022-07-13 21:51:18,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 139 transitions, 456 flow [2022-07-13 21:51:18,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 139 transitions, 336 flow, removed 40 selfloop flow, removed 19 redundant places. [2022-07-13 21:51:18,158 INFO L242 Difference]: Finished difference. Result has 144 places, 131 transitions, 282 flow [2022-07-13 21:51:18,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=282, PETRI_PLACES=144, PETRI_TRANSITIONS=131} [2022-07-13 21:51:18,160 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, -28 predicate places. [2022-07-13 21:51:18,160 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 131 transitions, 282 flow [2022-07-13 21:51:18,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 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 21:51:18,161 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:18,161 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:51:18,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:51:18,161 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:18,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:18,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1184178643, now seen corresponding path program 1 times [2022-07-13 21:51:18,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:18,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99975446] [2022-07-13 21:51:18,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:18,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:18,813 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 21:51:18,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:18,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99975446] [2022-07-13 21:51:18,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99975446] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:18,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:18,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:51:18,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140259342] [2022-07-13 21:51:18,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:18,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:51:18,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:18,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:51:18,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:51:18,818 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:51:18,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 131 transitions, 282 flow. Second operand has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:18,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:18,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:51:18,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:20,006 INFO L129 PetriNetUnfolder]: 578/1326 cut-off events. [2022-07-13 21:51:20,006 INFO L130 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2022-07-13 21:51:20,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2703 conditions, 1326 events. 578/1326 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6842 event pairs, 190 based on Foata normal form. 0/1277 useless extension candidates. Maximal degree in co-relation 2695. Up to 378 conditions per place. [2022-07-13 21:51:20,012 INFO L132 encePairwiseOnDemand]: 161/186 looper letters, 122 selfloop transitions, 27 changer transitions 0/212 dead transitions. [2022-07-13 21:51:20,013 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 212 transitions, 778 flow [2022-07-13 21:51:20,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 21:51:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-13 21:51:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1803 transitions. [2022-07-13 21:51:20,017 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5101867572156197 [2022-07-13 21:51:20,017 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1803 transitions. [2022-07-13 21:51:20,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1803 transitions. [2022-07-13 21:51:20,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:20,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1803 transitions. [2022-07-13 21:51:20,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 94.89473684210526) internal successors, (1803), 19 states have internal predecessors, (1803), 0 states have call successors, (0), 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 21:51:20,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 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 21:51:20,025 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 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 21:51:20,026 INFO L186 Difference]: Start difference. First operand has 144 places, 131 transitions, 282 flow. Second operand 19 states and 1803 transitions. [2022-07-13 21:51:20,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 212 transitions, 778 flow [2022-07-13 21:51:20,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 212 transitions, 771 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 21:51:20,029 INFO L242 Difference]: Finished difference. Result has 168 places, 147 transitions, 423 flow [2022-07-13 21:51:20,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=423, PETRI_PLACES=168, PETRI_TRANSITIONS=147} [2022-07-13 21:51:20,030 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, -4 predicate places. [2022-07-13 21:51:20,030 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 147 transitions, 423 flow [2022-07-13 21:51:20,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:20,031 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:20,031 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, 1, 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 21:51:20,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:51:20,031 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:20,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:20,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1988516733, now seen corresponding path program 2 times [2022-07-13 21:51:20,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:20,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117049441] [2022-07-13 21:51:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:20,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:20,363 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 21:51:20,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:20,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117049441] [2022-07-13 21:51:20,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117049441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:20,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:20,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-13 21:51:20,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619051667] [2022-07-13 21:51:20,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:20,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 21:51:20,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 21:51:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-07-13 21:51:20,366 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 186 [2022-07-13 21:51:20,367 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 147 transitions, 423 flow. Second operand has 15 states, 15 states have (on average 92.93333333333334) internal successors, (1394), 15 states have internal predecessors, (1394), 0 states have call successors, (0), 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 21:51:20,367 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:20,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 186 [2022-07-13 21:51:20,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:21,040 INFO L129 PetriNetUnfolder]: 540/1461 cut-off events. [2022-07-13 21:51:21,040 INFO L130 PetriNetUnfolder]: For 672/698 co-relation queries the response was YES. [2022-07-13 21:51:21,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3337 conditions, 1461 events. 540/1461 cut-off events. For 672/698 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 8950 event pairs, 101 based on Foata normal form. 17/1441 useless extension candidates. Maximal degree in co-relation 3320. Up to 376 conditions per place. [2022-07-13 21:51:21,047 INFO L132 encePairwiseOnDemand]: 161/186 looper letters, 114 selfloop transitions, 42 changer transitions 0/222 dead transitions. [2022-07-13 21:51:21,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 222 transitions, 1022 flow [2022-07-13 21:51:21,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 21:51:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-13 21:51:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1642 transitions. [2022-07-13 21:51:21,051 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.519291587602783 [2022-07-13 21:51:21,051 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1642 transitions. [2022-07-13 21:51:21,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1642 transitions. [2022-07-13 21:51:21,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:21,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1642 transitions. [2022-07-13 21:51:21,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 96.58823529411765) internal successors, (1642), 17 states have internal predecessors, (1642), 0 states have call successors, (0), 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 21:51:21,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 186.0) internal successors, (3348), 18 states have internal predecessors, (3348), 0 states have call successors, (0), 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 21:51:21,058 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 186.0) internal successors, (3348), 18 states have internal predecessors, (3348), 0 states have call successors, (0), 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 21:51:21,058 INFO L186 Difference]: Start difference. First operand has 168 places, 147 transitions, 423 flow. Second operand 17 states and 1642 transitions. [2022-07-13 21:51:21,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 222 transitions, 1022 flow [2022-07-13 21:51:21,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 222 transitions, 1006 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-13 21:51:21,063 INFO L242 Difference]: Finished difference. Result has 186 places, 174 transitions, 725 flow [2022-07-13 21:51:21,063 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=725, PETRI_PLACES=186, PETRI_TRANSITIONS=174} [2022-07-13 21:51:21,064 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 14 predicate places. [2022-07-13 21:51:21,064 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 174 transitions, 725 flow [2022-07-13 21:51:21,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 92.93333333333334) internal successors, (1394), 15 states have internal predecessors, (1394), 0 states have call successors, (0), 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 21:51:21,064 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:21,065 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, 1, 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 21:51:21,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:51:21,065 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:21,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:21,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1034154241, now seen corresponding path program 3 times [2022-07-13 21:51:21,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:21,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858489050] [2022-07-13 21:51:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:21,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:21,404 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 21:51:21,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:21,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858489050] [2022-07-13 21:51:21,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858489050] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:21,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:21,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-13 21:51:21,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380082011] [2022-07-13 21:51:21,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:21,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 21:51:21,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:21,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 21:51:21,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:51:21,406 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:51:21,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 174 transitions, 725 flow. Second operand has 17 states, 17 states have (on average 90.58823529411765) internal successors, (1540), 17 states have internal predecessors, (1540), 0 states have call successors, (0), 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 21:51:21,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:21,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:51:21,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:23,058 INFO L129 PetriNetUnfolder]: 1012/2619 cut-off events. [2022-07-13 21:51:23,059 INFO L130 PetriNetUnfolder]: For 2473/2473 co-relation queries the response was YES. [2022-07-13 21:51:23,067 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6899 conditions, 2619 events. 1012/2619 cut-off events. For 2473/2473 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 18372 event pairs, 208 based on Foata normal form. 1/2553 useless extension candidates. Maximal degree in co-relation 6874. Up to 603 conditions per place. [2022-07-13 21:51:23,077 INFO L132 encePairwiseOnDemand]: 162/186 looper letters, 196 selfloop transitions, 69 changer transitions 0/328 dead transitions. [2022-07-13 21:51:23,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 328 transitions, 1982 flow [2022-07-13 21:51:23,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 21:51:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-13 21:51:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2725 transitions. [2022-07-13 21:51:23,085 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5051909529106414 [2022-07-13 21:51:23,085 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2725 transitions. [2022-07-13 21:51:23,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2725 transitions. [2022-07-13 21:51:23,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:23,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2725 transitions. [2022-07-13 21:51:23,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 93.96551724137932) internal successors, (2725), 29 states have internal predecessors, (2725), 0 states have call successors, (0), 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 21:51:23,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 186.0) internal successors, (5580), 30 states have internal predecessors, (5580), 0 states have call successors, (0), 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 21:51:23,098 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 186.0) internal successors, (5580), 30 states have internal predecessors, (5580), 0 states have call successors, (0), 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 21:51:23,098 INFO L186 Difference]: Start difference. First operand has 186 places, 174 transitions, 725 flow. Second operand 29 states and 2725 transitions. [2022-07-13 21:51:23,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 328 transitions, 1982 flow [2022-07-13 21:51:23,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 328 transitions, 1957 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-13 21:51:23,109 INFO L242 Difference]: Finished difference. Result has 222 places, 214 transitions, 1217 flow [2022-07-13 21:51:23,110 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1217, PETRI_PLACES=222, PETRI_TRANSITIONS=214} [2022-07-13 21:51:23,110 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 50 predicate places. [2022-07-13 21:51:23,110 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 214 transitions, 1217 flow [2022-07-13 21:51:23,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 90.58823529411765) internal successors, (1540), 17 states have internal predecessors, (1540), 0 states have call successors, (0), 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 21:51:23,111 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:23,111 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, 1, 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 21:51:23,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:51:23,111 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:23,112 INFO L85 PathProgramCache]: Analyzing trace with hash -890503641, now seen corresponding path program 4 times [2022-07-13 21:51:23,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:23,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009371473] [2022-07-13 21:51:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:23,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:23,404 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 21:51:23,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:23,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009371473] [2022-07-13 21:51:23,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009371473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:23,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:23,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 21:51:23,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39708881] [2022-07-13 21:51:23,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:23,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 21:51:23,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:23,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 21:51:23,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:51:23,407 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 186 [2022-07-13 21:51:23,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 214 transitions, 1217 flow. Second operand has 16 states, 16 states have (on average 92.6875) internal successors, (1483), 16 states have internal predecessors, (1483), 0 states have call successors, (0), 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 21:51:23,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:23,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 186 [2022-07-13 21:51:23,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:24,346 INFO L129 PetriNetUnfolder]: 829/2406 cut-off events. [2022-07-13 21:51:24,346 INFO L130 PetriNetUnfolder]: For 5144/5167 co-relation queries the response was YES. [2022-07-13 21:51:24,354 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7100 conditions, 2406 events. 829/2406 cut-off events. For 5144/5167 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 17545 event pairs, 410 based on Foata normal form. 16/2356 useless extension candidates. Maximal degree in co-relation 7060. Up to 927 conditions per place. [2022-07-13 21:51:24,363 INFO L132 encePairwiseOnDemand]: 162/186 looper letters, 143 selfloop transitions, 64 changer transitions 0/280 dead transitions. [2022-07-13 21:51:24,363 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 280 transitions, 2021 flow [2022-07-13 21:51:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 21:51:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-13 21:51:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2173 transitions. [2022-07-13 21:51:24,366 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.507947639083684 [2022-07-13 21:51:24,366 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2173 transitions. [2022-07-13 21:51:24,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2173 transitions. [2022-07-13 21:51:24,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:24,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2173 transitions. [2022-07-13 21:51:24,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 94.47826086956522) internal successors, (2173), 23 states have internal predecessors, (2173), 0 states have call successors, (0), 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 21:51:24,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 186.0) internal successors, (4464), 24 states have internal predecessors, (4464), 0 states have call successors, (0), 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 21:51:24,382 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 186.0) internal successors, (4464), 24 states have internal predecessors, (4464), 0 states have call successors, (0), 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 21:51:24,382 INFO L186 Difference]: Start difference. First operand has 222 places, 214 transitions, 1217 flow. Second operand 23 states and 2173 transitions. [2022-07-13 21:51:24,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 280 transitions, 2021 flow [2022-07-13 21:51:24,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 280 transitions, 1939 flow, removed 25 selfloop flow, removed 5 redundant places. [2022-07-13 21:51:24,401 INFO L242 Difference]: Finished difference. Result has 249 places, 231 transitions, 1506 flow [2022-07-13 21:51:24,401 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1506, PETRI_PLACES=249, PETRI_TRANSITIONS=231} [2022-07-13 21:51:24,402 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 77 predicate places. [2022-07-13 21:51:24,402 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 231 transitions, 1506 flow [2022-07-13 21:51:24,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 92.6875) internal successors, (1483), 16 states have internal predecessors, (1483), 0 states have call successors, (0), 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 21:51:24,403 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:24,403 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, 1, 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 21:51:24,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 21:51:24,404 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:24,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash 582936923, now seen corresponding path program 5 times [2022-07-13 21:51:24,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:24,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702574089] [2022-07-13 21:51:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:24,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:24,663 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 21:51:24,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:24,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702574089] [2022-07-13 21:51:24,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702574089] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:24,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:24,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-13 21:51:24,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300361246] [2022-07-13 21:51:24,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:24,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 21:51:24,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:24,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 21:51:24,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-07-13 21:51:24,666 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 186 [2022-07-13 21:51:24,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 231 transitions, 1506 flow. Second operand has 15 states, 15 states have (on average 92.93333333333334) internal successors, (1394), 15 states have internal predecessors, (1394), 0 states have call successors, (0), 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 21:51:24,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:24,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 186 [2022-07-13 21:51:24,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:25,538 INFO L129 PetriNetUnfolder]: 834/2481 cut-off events. [2022-07-13 21:51:25,538 INFO L130 PetriNetUnfolder]: For 7664/7738 co-relation queries the response was YES. [2022-07-13 21:51:25,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7682 conditions, 2481 events. 834/2481 cut-off events. For 7664/7738 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 18453 event pairs, 112 based on Foata normal form. 49/2485 useless extension candidates. Maximal degree in co-relation 7631. Up to 538 conditions per place. [2022-07-13 21:51:25,561 INFO L132 encePairwiseOnDemand]: 161/186 looper letters, 162 selfloop transitions, 94 changer transitions 0/329 dead transitions. [2022-07-13 21:51:25,561 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 329 transitions, 2657 flow [2022-07-13 21:51:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 21:51:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-13 21:51:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1847 transitions. [2022-07-13 21:51:25,564 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5226372382569326 [2022-07-13 21:51:25,564 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1847 transitions. [2022-07-13 21:51:25,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1847 transitions. [2022-07-13 21:51:25,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:25,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1847 transitions. [2022-07-13 21:51:25,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 97.21052631578948) internal successors, (1847), 19 states have internal predecessors, (1847), 0 states have call successors, (0), 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 21:51:25,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 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 21:51:25,570 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 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 21:51:25,570 INFO L186 Difference]: Start difference. First operand has 249 places, 231 transitions, 1506 flow. Second operand 19 states and 1847 transitions. [2022-07-13 21:51:25,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 329 transitions, 2657 flow [2022-07-13 21:51:25,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 329 transitions, 2548 flow, removed 29 selfloop flow, removed 8 redundant places. [2022-07-13 21:51:25,599 INFO L242 Difference]: Finished difference. Result has 266 places, 259 transitions, 2054 flow [2022-07-13 21:51:25,600 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2054, PETRI_PLACES=266, PETRI_TRANSITIONS=259} [2022-07-13 21:51:25,601 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 94 predicate places. [2022-07-13 21:51:25,601 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 259 transitions, 2054 flow [2022-07-13 21:51:25,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 92.93333333333334) internal successors, (1394), 15 states have internal predecessors, (1394), 0 states have call successors, (0), 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 21:51:25,602 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:25,602 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, 1, 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 21:51:25,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 21:51:25,602 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:25,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:25,603 INFO L85 PathProgramCache]: Analyzing trace with hash 823583075, now seen corresponding path program 6 times [2022-07-13 21:51:25,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:25,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453671216] [2022-07-13 21:51:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:25,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:25,999 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 21:51:26,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:26,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453671216] [2022-07-13 21:51:26,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453671216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:26,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:26,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:51:26,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159205094] [2022-07-13 21:51:26,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:26,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:51:26,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:26,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:51:26,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:51:26,003 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:51:26,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 259 transitions, 2054 flow. Second operand has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:26,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:26,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:51:26,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:27,495 INFO L129 PetriNetUnfolder]: 1333/3626 cut-off events. [2022-07-13 21:51:27,495 INFO L130 PetriNetUnfolder]: For 13151/13177 co-relation queries the response was YES. [2022-07-13 21:51:27,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12178 conditions, 3626 events. 1333/3626 cut-off events. For 13151/13177 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 28461 event pairs, 406 based on Foata normal form. 25/3553 useless extension candidates. Maximal degree in co-relation 12120. Up to 1515 conditions per place. [2022-07-13 21:51:27,517 INFO L132 encePairwiseOnDemand]: 160/186 looper letters, 216 selfloop transitions, 97 changer transitions 0/376 dead transitions. [2022-07-13 21:51:27,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 376 transitions, 3663 flow [2022-07-13 21:51:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 21:51:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-13 21:51:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1811 transitions. [2022-07-13 21:51:27,520 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.512450481041313 [2022-07-13 21:51:27,520 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1811 transitions. [2022-07-13 21:51:27,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1811 transitions. [2022-07-13 21:51:27,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:27,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1811 transitions. [2022-07-13 21:51:27,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 95.3157894736842) internal successors, (1811), 19 states have internal predecessors, (1811), 0 states have call successors, (0), 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 21:51:27,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 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 21:51:27,526 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 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 21:51:27,527 INFO L186 Difference]: Start difference. First operand has 266 places, 259 transitions, 2054 flow. Second operand 19 states and 1811 transitions. [2022-07-13 21:51:27,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 376 transitions, 3663 flow [2022-07-13 21:51:27,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 376 transitions, 3544 flow, removed 41 selfloop flow, removed 6 redundant places. [2022-07-13 21:51:27,583 INFO L242 Difference]: Finished difference. Result has 288 places, 297 transitions, 2848 flow [2022-07-13 21:51:27,583 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2848, PETRI_PLACES=288, PETRI_TRANSITIONS=297} [2022-07-13 21:51:27,584 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 116 predicate places. [2022-07-13 21:51:27,584 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 297 transitions, 2848 flow [2022-07-13 21:51:27,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:27,584 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:27,585 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, 1, 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 21:51:27,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:51:27,585 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:27,585 INFO L85 PathProgramCache]: Analyzing trace with hash -330867283, now seen corresponding path program 7 times [2022-07-13 21:51:27,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:27,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850519375] [2022-07-13 21:51:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:27,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:27,944 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 21:51:27,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:27,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850519375] [2022-07-13 21:51:27,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850519375] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:27,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:27,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:51:27,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910179751] [2022-07-13 21:51:27,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:27,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:51:27,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:27,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:51:27,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:51:27,946 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:51:27,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 297 transitions, 2848 flow. Second operand has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:27,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:27,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:51:27,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:30,418 INFO L129 PetriNetUnfolder]: 1706/4800 cut-off events. [2022-07-13 21:51:30,418 INFO L130 PetriNetUnfolder]: For 20182/20204 co-relation queries the response was YES. [2022-07-13 21:51:30,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17005 conditions, 4800 events. 1706/4800 cut-off events. For 20182/20204 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 41288 event pairs, 336 based on Foata normal form. 19/4702 useless extension candidates. Maximal degree in co-relation 16937. Up to 1021 conditions per place. [2022-07-13 21:51:30,455 INFO L132 encePairwiseOnDemand]: 157/186 looper letters, 298 selfloop transitions, 178 changer transitions 0/539 dead transitions. [2022-07-13 21:51:30,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 539 transitions, 6073 flow [2022-07-13 21:51:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 21:51:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-13 21:51:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2751 transitions. [2022-07-13 21:51:30,459 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5100111234705228 [2022-07-13 21:51:30,459 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2751 transitions. [2022-07-13 21:51:30,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2751 transitions. [2022-07-13 21:51:30,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:30,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2751 transitions. [2022-07-13 21:51:30,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 94.86206896551724) internal successors, (2751), 29 states have internal predecessors, (2751), 0 states have call successors, (0), 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 21:51:30,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 186.0) internal successors, (5580), 30 states have internal predecessors, (5580), 0 states have call successors, (0), 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 21:51:30,468 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 186.0) internal successors, (5580), 30 states have internal predecessors, (5580), 0 states have call successors, (0), 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 21:51:30,468 INFO L186 Difference]: Start difference. First operand has 288 places, 297 transitions, 2848 flow. Second operand 29 states and 2751 transitions. [2022-07-13 21:51:30,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 539 transitions, 6073 flow [2022-07-13 21:51:30,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 539 transitions, 5961 flow, removed 38 selfloop flow, removed 6 redundant places. [2022-07-13 21:51:30,590 INFO L242 Difference]: Finished difference. Result has 327 places, 399 transitions, 4828 flow [2022-07-13 21:51:30,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4828, PETRI_PLACES=327, PETRI_TRANSITIONS=399} [2022-07-13 21:51:30,592 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 155 predicate places. [2022-07-13 21:51:30,593 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 399 transitions, 4828 flow [2022-07-13 21:51:30,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:30,593 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:30,593 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, 1, 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 21:51:30,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:51:30,594 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:30,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:30,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2020415377, now seen corresponding path program 8 times [2022-07-13 21:51:30,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:30,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721634620] [2022-07-13 21:51:30,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:30,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:31,002 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 21:51:31,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:31,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721634620] [2022-07-13 21:51:31,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721634620] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:31,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:31,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:51:31,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041109466] [2022-07-13 21:51:31,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:31,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:51:31,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:31,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:51:31,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:51:31,004 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:51:31,005 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 399 transitions, 4828 flow. Second operand has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:31,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:31,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:51:31,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:32,891 INFO L129 PetriNetUnfolder]: 2053/5991 cut-off events. [2022-07-13 21:51:32,891 INFO L130 PetriNetUnfolder]: For 32784/32784 co-relation queries the response was YES. [2022-07-13 21:51:32,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23067 conditions, 5991 events. 2053/5991 cut-off events. For 32784/32784 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 54268 event pairs, 1045 based on Foata normal form. 1/5837 useless extension candidates. Maximal degree in co-relation 22982. Up to 2353 conditions per place. [2022-07-13 21:51:32,942 INFO L132 encePairwiseOnDemand]: 163/186 looper letters, 324 selfloop transitions, 144 changer transitions 0/531 dead transitions. [2022-07-13 21:51:32,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 531 transitions, 7128 flow [2022-07-13 21:51:32,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 21:51:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-13 21:51:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1886 transitions. [2022-07-13 21:51:32,945 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5069892473118279 [2022-07-13 21:51:32,945 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1886 transitions. [2022-07-13 21:51:32,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1886 transitions. [2022-07-13 21:51:32,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:32,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1886 transitions. [2022-07-13 21:51:32,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 94.3) internal successors, (1886), 20 states have internal predecessors, (1886), 0 states have call successors, (0), 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 21:51:32,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 186.0) internal successors, (3906), 21 states have internal predecessors, (3906), 0 states have call successors, (0), 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 21:51:32,952 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 186.0) internal successors, (3906), 21 states have internal predecessors, (3906), 0 states have call successors, (0), 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 21:51:32,952 INFO L186 Difference]: Start difference. First operand has 327 places, 399 transitions, 4828 flow. Second operand 20 states and 1886 transitions. [2022-07-13 21:51:32,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 531 transitions, 7128 flow [2022-07-13 21:51:33,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 531 transitions, 6930 flow, removed 65 selfloop flow, removed 7 redundant places. [2022-07-13 21:51:33,138 INFO L242 Difference]: Finished difference. Result has 350 places, 438 transitions, 5696 flow [2022-07-13 21:51:33,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=4671, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5696, PETRI_PLACES=350, PETRI_TRANSITIONS=438} [2022-07-13 21:51:33,140 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 178 predicate places. [2022-07-13 21:51:33,140 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 438 transitions, 5696 flow [2022-07-13 21:51:33,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:33,141 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:33,141 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, 1, 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 21:51:33,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 21:51:33,141 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:33,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:33,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1498580403, now seen corresponding path program 9 times [2022-07-13 21:51:33,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:33,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51769131] [2022-07-13 21:51:33,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:33,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:33,637 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 21:51:33,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:33,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51769131] [2022-07-13 21:51:33,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51769131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:33,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:33,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-13 21:51:33,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059927645] [2022-07-13 21:51:33,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:33,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 21:51:33,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:33,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 21:51:33,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-07-13 21:51:33,639 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:51:33,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 438 transitions, 5696 flow. Second operand has 19 states, 19 states have (on average 90.21052631578948) internal successors, (1714), 19 states have internal predecessors, (1714), 0 states have call successors, (0), 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 21:51:33,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:33,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:51:33,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:36,226 INFO L129 PetriNetUnfolder]: 2580/7776 cut-off events. [2022-07-13 21:51:36,227 INFO L130 PetriNetUnfolder]: For 45991/46023 co-relation queries the response was YES. [2022-07-13 21:51:36,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30179 conditions, 7776 events. 2580/7776 cut-off events. For 45991/46023 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 76908 event pairs, 676 based on Foata normal form. 26/7606 useless extension candidates. Maximal degree in co-relation 30082. Up to 1645 conditions per place. [2022-07-13 21:51:36,295 INFO L132 encePairwiseOnDemand]: 159/186 looper letters, 400 selfloop transitions, 244 changer transitions 0/707 dead transitions. [2022-07-13 21:51:36,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 707 transitions, 10527 flow [2022-07-13 21:51:36,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:51:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:51:36,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2012 transitions. [2022-07-13 21:51:36,298 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.51510496671787 [2022-07-13 21:51:36,298 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2012 transitions. [2022-07-13 21:51:36,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2012 transitions. [2022-07-13 21:51:36,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:36,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2012 transitions. [2022-07-13 21:51:36,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 95.80952380952381) internal successors, (2012), 21 states have internal predecessors, (2012), 0 states have call successors, (0), 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 21:51:36,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 186.0) internal successors, (4092), 22 states have internal predecessors, (4092), 0 states have call successors, (0), 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 21:51:36,304 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 186.0) internal successors, (4092), 22 states have internal predecessors, (4092), 0 states have call successors, (0), 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 21:51:36,304 INFO L186 Difference]: Start difference. First operand has 350 places, 438 transitions, 5696 flow. Second operand 21 states and 2012 transitions. [2022-07-13 21:51:36,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 707 transitions, 10527 flow [2022-07-13 21:51:36,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 707 transitions, 10436 flow, removed 39 selfloop flow, removed 5 redundant places. [2022-07-13 21:51:36,616 INFO L242 Difference]: Finished difference. Result has 375 places, 537 transitions, 8317 flow [2022-07-13 21:51:36,617 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=5605, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8317, PETRI_PLACES=375, PETRI_TRANSITIONS=537} [2022-07-13 21:51:36,617 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 203 predicate places. [2022-07-13 21:51:36,617 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 537 transitions, 8317 flow [2022-07-13 21:51:36,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.21052631578948) internal successors, (1714), 19 states have internal predecessors, (1714), 0 states have call successors, (0), 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 21:51:36,618 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:36,618 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, 1, 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 21:51:36,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 21:51:36,618 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:36,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1776002135, now seen corresponding path program 10 times [2022-07-13 21:51:36,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:36,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354038580] [2022-07-13 21:51:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:36,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:37,094 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 21:51:37,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:37,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354038580] [2022-07-13 21:51:37,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354038580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:37,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:37,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-13 21:51:37,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635685601] [2022-07-13 21:51:37,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:37,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 21:51:37,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:37,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 21:51:37,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-07-13 21:51:37,097 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:51:37,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 537 transitions, 8317 flow. Second operand has 19 states, 19 states have (on average 90.21052631578948) internal successors, (1714), 19 states have internal predecessors, (1714), 0 states have call successors, (0), 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 21:51:37,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:37,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:51:37,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:39,925 INFO L129 PetriNetUnfolder]: 2573/7926 cut-off events. [2022-07-13 21:51:39,925 INFO L130 PetriNetUnfolder]: For 60447/60469 co-relation queries the response was YES. [2022-07-13 21:51:39,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33779 conditions, 7926 events. 2573/7926 cut-off events. For 60447/60469 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 79219 event pairs, 1087 based on Foata normal form. 11/7747 useless extension candidates. Maximal degree in co-relation 33672. Up to 2418 conditions per place. [2022-07-13 21:51:40,008 INFO L132 encePairwiseOnDemand]: 161/186 looper letters, 416 selfloop transitions, 239 changer transitions 0/718 dead transitions. [2022-07-13 21:51:40,009 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 718 transitions, 12011 flow [2022-07-13 21:51:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 21:51:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-13 21:51:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2430 transitions. [2022-07-13 21:51:40,017 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5024813895781638 [2022-07-13 21:51:40,017 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2430 transitions. [2022-07-13 21:51:40,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2430 transitions. [2022-07-13 21:51:40,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:40,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2430 transitions. [2022-07-13 21:51:40,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 93.46153846153847) internal successors, (2430), 26 states have internal predecessors, (2430), 0 states have call successors, (0), 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 21:51:40,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 186.0) internal successors, (5022), 27 states have internal predecessors, (5022), 0 states have call successors, (0), 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 21:51:40,024 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 186.0) internal successors, (5022), 27 states have internal predecessors, (5022), 0 states have call successors, (0), 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 21:51:40,024 INFO L186 Difference]: Start difference. First operand has 375 places, 537 transitions, 8317 flow. Second operand 26 states and 2430 transitions. [2022-07-13 21:51:40,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 718 transitions, 12011 flow [2022-07-13 21:51:40,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 718 transitions, 11898 flow, removed 31 selfloop flow, removed 6 redundant places. [2022-07-13 21:51:40,410 INFO L242 Difference]: Finished difference. Result has 404 places, 584 transitions, 9906 flow [2022-07-13 21:51:40,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=8208, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9906, PETRI_PLACES=404, PETRI_TRANSITIONS=584} [2022-07-13 21:51:40,412 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 232 predicate places. [2022-07-13 21:51:40,412 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 584 transitions, 9906 flow [2022-07-13 21:51:40,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.21052631578948) internal successors, (1714), 19 states have internal predecessors, (1714), 0 states have call successors, (0), 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 21:51:40,412 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:40,412 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, 1, 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 21:51:40,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 21:51:40,413 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:40,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:40,413 INFO L85 PathProgramCache]: Analyzing trace with hash 310198337, now seen corresponding path program 11 times [2022-07-13 21:51:40,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:40,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061424317] [2022-07-13 21:51:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:40,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:40,778 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 21:51:40,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:40,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061424317] [2022-07-13 21:51:40,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061424317] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:40,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:40,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:51:40,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739809173] [2022-07-13 21:51:40,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:40,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:51:40,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:40,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:51:40,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:51:40,782 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:51:40,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 584 transitions, 9906 flow. Second operand has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:40,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:40,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:51:40,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:43,589 INFO L129 PetriNetUnfolder]: 2573/7908 cut-off events. [2022-07-13 21:51:43,589 INFO L130 PetriNetUnfolder]: For 66248/66276 co-relation queries the response was YES. [2022-07-13 21:51:43,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34469 conditions, 7908 events. 2573/7908 cut-off events. For 66248/66276 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 79086 event pairs, 897 based on Foata normal form. 17/7743 useless extension candidates. Maximal degree in co-relation 34351. Up to 2689 conditions per place. [2022-07-13 21:51:43,667 INFO L132 encePairwiseOnDemand]: 162/186 looper letters, 405 selfloop transitions, 243 changer transitions 0/711 dead transitions. [2022-07-13 21:51:43,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 711 transitions, 12541 flow [2022-07-13 21:51:43,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:51:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:51:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1989 transitions. [2022-07-13 21:51:43,677 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5092165898617511 [2022-07-13 21:51:43,677 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1989 transitions. [2022-07-13 21:51:43,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1989 transitions. [2022-07-13 21:51:43,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:43,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1989 transitions. [2022-07-13 21:51:43,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 94.71428571428571) internal successors, (1989), 21 states have internal predecessors, (1989), 0 states have call successors, (0), 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 21:51:43,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 186.0) internal successors, (4092), 22 states have internal predecessors, (4092), 0 states have call successors, (0), 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 21:51:43,683 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 186.0) internal successors, (4092), 22 states have internal predecessors, (4092), 0 states have call successors, (0), 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 21:51:43,683 INFO L186 Difference]: Start difference. First operand has 404 places, 584 transitions, 9906 flow. Second operand 21 states and 1989 transitions. [2022-07-13 21:51:43,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 711 transitions, 12541 flow [2022-07-13 21:51:44,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 711 transitions, 12303 flow, removed 88 selfloop flow, removed 7 redundant places. [2022-07-13 21:51:44,142 INFO L242 Difference]: Finished difference. Result has 422 places, 604 transitions, 10625 flow [2022-07-13 21:51:44,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=9672, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10625, PETRI_PLACES=422, PETRI_TRANSITIONS=604} [2022-07-13 21:51:44,143 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 250 predicate places. [2022-07-13 21:51:44,143 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 604 transitions, 10625 flow [2022-07-13 21:51:44,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:44,144 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:44,144 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, 1, 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 21:51:44,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 21:51:44,144 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:44,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1166252689, now seen corresponding path program 12 times [2022-07-13 21:51:44,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:44,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115284827] [2022-07-13 21:51:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:44,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:44,513 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 21:51:44,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:44,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115284827] [2022-07-13 21:51:44,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115284827] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:44,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:44,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:51:44,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604600108] [2022-07-13 21:51:44,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:44,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:51:44,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:44,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:51:44,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:51:44,516 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:51:44,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 604 transitions, 10625 flow. Second operand has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:44,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:44,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:51:44,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:48,235 INFO L129 PetriNetUnfolder]: 3592/10918 cut-off events. [2022-07-13 21:51:48,235 INFO L130 PetriNetUnfolder]: For 88874/88924 co-relation queries the response was YES. [2022-07-13 21:51:48,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47353 conditions, 10918 events. 3592/10918 cut-off events. For 88874/88924 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 117484 event pairs, 1305 based on Foata normal form. 30/10707 useless extension candidates. Maximal degree in co-relation 47230. Up to 3091 conditions per place. [2022-07-13 21:51:48,424 INFO L132 encePairwiseOnDemand]: 161/186 looper letters, 484 selfloop transitions, 259 changer transitions 0/806 dead transitions. [2022-07-13 21:51:48,425 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 806 transitions, 15182 flow [2022-07-13 21:51:48,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 21:51:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-13 21:51:48,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1810 transitions. [2022-07-13 21:51:48,432 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5121675155631012 [2022-07-13 21:51:48,433 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1810 transitions. [2022-07-13 21:51:48,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1810 transitions. [2022-07-13 21:51:48,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:48,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1810 transitions. [2022-07-13 21:51:48,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 95.26315789473684) internal successors, (1810), 19 states have internal predecessors, (1810), 0 states have call successors, (0), 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 21:51:48,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 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 21:51:48,438 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 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 21:51:48,438 INFO L186 Difference]: Start difference. First operand has 422 places, 604 transitions, 10625 flow. Second operand 19 states and 1810 transitions. [2022-07-13 21:51:48,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 806 transitions, 15182 flow [2022-07-13 21:51:48,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 806 transitions, 14795 flow, removed 80 selfloop flow, removed 14 redundant places. [2022-07-13 21:51:48,983 INFO L242 Difference]: Finished difference. Result has 436 places, 681 transitions, 12862 flow [2022-07-13 21:51:48,984 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=10268, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12862, PETRI_PLACES=436, PETRI_TRANSITIONS=681} [2022-07-13 21:51:48,984 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 264 predicate places. [2022-07-13 21:51:48,984 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 681 transitions, 12862 flow [2022-07-13 21:51:48,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:48,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:48,985 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, 1, 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 21:51:48,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 21:51:48,985 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:48,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1776593229, now seen corresponding path program 13 times [2022-07-13 21:51:48,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:48,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734221333] [2022-07-13 21:51:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:48,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:49,327 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 21:51:49,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:49,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734221333] [2022-07-13 21:51:49,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734221333] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:49,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:49,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:51:49,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862505912] [2022-07-13 21:51:49,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:49,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:51:49,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:49,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:51:49,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:51:49,331 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:51:49,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 681 transitions, 12862 flow. Second operand has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:49,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:49,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:51:49,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:53,435 INFO L129 PetriNetUnfolder]: 3604/11144 cut-off events. [2022-07-13 21:51:53,435 INFO L130 PetriNetUnfolder]: For 103213/103317 co-relation queries the response was YES. [2022-07-13 21:51:53,585 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49592 conditions, 11144 events. 3604/11144 cut-off events. For 103213/103317 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 120698 event pairs, 1432 based on Foata normal form. 49/10957 useless extension candidates. Maximal degree in co-relation 49466. Up to 3091 conditions per place. [2022-07-13 21:51:53,614 INFO L132 encePairwiseOnDemand]: 160/186 looper letters, 542 selfloop transitions, 265 changer transitions 0/870 dead transitions. [2022-07-13 21:51:53,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 870 transitions, 17220 flow [2022-07-13 21:51:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 21:51:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-13 21:51:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1823 transitions. [2022-07-13 21:51:53,617 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5158460667798529 [2022-07-13 21:51:53,617 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1823 transitions. [2022-07-13 21:51:53,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1823 transitions. [2022-07-13 21:51:53,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:53,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1823 transitions. [2022-07-13 21:51:53,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 95.94736842105263) internal successors, (1823), 19 states have internal predecessors, (1823), 0 states have call successors, (0), 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 21:51:53,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 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 21:51:53,622 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 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 21:51:53,622 INFO L186 Difference]: Start difference. First operand has 436 places, 681 transitions, 12862 flow. Second operand 19 states and 1823 transitions. [2022-07-13 21:51:53,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 870 transitions, 17220 flow [2022-07-13 21:51:54,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 870 transitions, 16991 flow, removed 103 selfloop flow, removed 5 redundant places. [2022-07-13 21:51:54,395 INFO L242 Difference]: Finished difference. Result has 459 places, 741 transitions, 14987 flow [2022-07-13 21:51:54,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=12639, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=14987, PETRI_PLACES=459, PETRI_TRANSITIONS=741} [2022-07-13 21:51:54,396 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 287 predicate places. [2022-07-13 21:51:54,397 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 741 transitions, 14987 flow [2022-07-13 21:51:54,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:54,397 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:54,397 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, 1, 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 21:51:54,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 21:51:54,397 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:51:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:54,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1682151881, now seen corresponding path program 14 times [2022-07-13 21:51:54,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:54,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942562034] [2022-07-13 21:51:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:54,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:54,771 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 21:51:54,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:54,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942562034] [2022-07-13 21:51:54,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942562034] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:54,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:54,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:51:54,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869645383] [2022-07-13 21:51:54,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:54,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:51:54,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:54,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:51:54,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:51:54,776 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:51:54,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 741 transitions, 14987 flow. Second operand has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 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 21:51:54,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:54,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:51:54,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:59,637 INFO L129 PetriNetUnfolder]: 3602/11212 cut-off events. [2022-07-13 21:51:59,637 INFO L130 PetriNetUnfolder]: For 117805/117841 co-relation queries the response was YES. [2022-07-13 21:51:59,739 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51471 conditions, 11212 events. 3602/11212 cut-off events. For 117805/117841 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 121979 event pairs, 1341 based on Foata normal form. 23/10992 useless extension candidates. Maximal degree in co-relation 51335. Up to 3091 conditions per place. [2022-07-13 21:51:59,768 INFO L132 encePairwiseOnDemand]: 158/186 looper letters, 561 selfloop transitions, 325 changer transitions 0/949 dead transitions. [2022-07-13 21:51:59,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 949 transitions, 19608 flow [2022-07-13 21:51:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 21:51:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-13 21:51:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2557 transitions. [2022-07-13 21:51:59,770 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5091596973317404 [2022-07-13 21:51:59,770 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2557 transitions. [2022-07-13 21:51:59,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2557 transitions. [2022-07-13 21:51:59,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:59,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2557 transitions. [2022-07-13 21:51:59,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 94.70370370370371) internal successors, (2557), 27 states have internal predecessors, (2557), 0 states have call successors, (0), 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 21:51:59,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 186.0) internal successors, (5208), 28 states have internal predecessors, (5208), 0 states have call successors, (0), 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 21:51:59,776 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 186.0) internal successors, (5208), 28 states have internal predecessors, (5208), 0 states have call successors, (0), 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 21:51:59,776 INFO L186 Difference]: Start difference. First operand has 459 places, 741 transitions, 14987 flow. Second operand 27 states and 2557 transitions. [2022-07-13 21:51:59,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 949 transitions, 19608 flow [2022-07-13 21:52:00,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 949 transitions, 19169 flow, removed 170 selfloop flow, removed 6 redundant places. [2022-07-13 21:52:00,679 INFO L242 Difference]: Finished difference. Result has 491 places, 805 transitions, 17174 flow [2022-07-13 21:52:00,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=14595, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=17174, PETRI_PLACES=491, PETRI_TRANSITIONS=805} [2022-07-13 21:52:00,680 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 319 predicate places. [2022-07-13 21:52:00,680 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 805 transitions, 17174 flow [2022-07-13 21:52:00,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:00,681 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:00,681 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:00,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 21:52:00,681 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:52:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:00,682 INFO L85 PathProgramCache]: Analyzing trace with hash 770554321, now seen corresponding path program 15 times [2022-07-13 21:52:00,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:00,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928044217] [2022-07-13 21:52:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:00,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:52:01,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:01,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928044217] [2022-07-13 21:52:01,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928044217] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:01,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:01,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:52:01,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651209516] [2022-07-13 21:52:01,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:01,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:52:01,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:01,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:52:01,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:52:01,054 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:52:01,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 805 transitions, 17174 flow. Second operand has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:01,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:01,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:52:01,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:05,749 INFO L129 PetriNetUnfolder]: 3599/11294 cut-off events. [2022-07-13 21:52:05,749 INFO L130 PetriNetUnfolder]: For 133671/133774 co-relation queries the response was YES. [2022-07-13 21:52:05,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53614 conditions, 11294 events. 3599/11294 cut-off events. For 133671/133774 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 122843 event pairs, 1420 based on Foata normal form. 48/11107 useless extension candidates. Maximal degree in co-relation 53467. Up to 3091 conditions per place. [2022-07-13 21:52:05,896 INFO L132 encePairwiseOnDemand]: 161/186 looper letters, 562 selfloop transitions, 314 changer transitions 0/939 dead transitions. [2022-07-13 21:52:05,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 939 transitions, 20824 flow [2022-07-13 21:52:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 21:52:05,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-13 21:52:05,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1902 transitions. [2022-07-13 21:52:05,898 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5112903225806451 [2022-07-13 21:52:05,898 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1902 transitions. [2022-07-13 21:52:05,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1902 transitions. [2022-07-13 21:52:05,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:05,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1902 transitions. [2022-07-13 21:52:05,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 95.1) internal successors, (1902), 20 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:05,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 186.0) internal successors, (3906), 21 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:05,903 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 186.0) internal successors, (3906), 21 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:05,903 INFO L186 Difference]: Start difference. First operand has 491 places, 805 transitions, 17174 flow. Second operand 20 states and 1902 transitions. [2022-07-13 21:52:05,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 939 transitions, 20824 flow [2022-07-13 21:52:07,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 939 transitions, 20466 flow, removed 110 selfloop flow, removed 8 redundant places. [2022-07-13 21:52:07,155 INFO L242 Difference]: Finished difference. Result has 510 places, 836 transitions, 18697 flow [2022-07-13 21:52:07,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=16816, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=18697, PETRI_PLACES=510, PETRI_TRANSITIONS=836} [2022-07-13 21:52:07,156 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 338 predicate places. [2022-07-13 21:52:07,156 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 836 transitions, 18697 flow [2022-07-13 21:52:07,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:07,157 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:07,157 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:07,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 21:52:07,157 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:52:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:07,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1054814223, now seen corresponding path program 16 times [2022-07-13 21:52:07,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:07,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194461380] [2022-07-13 21:52:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:07,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:52:07,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:07,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194461380] [2022-07-13 21:52:07,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194461380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:07,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:07,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-13 21:52:07,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675666440] [2022-07-13 21:52:07,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:07,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 21:52:07,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:07,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 21:52:07,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-13 21:52:07,489 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 186 [2022-07-13 21:52:07,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 836 transitions, 18697 flow. Second operand has 15 states, 15 states have (on average 92.93333333333334) internal successors, (1394), 15 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:07,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:07,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 186 [2022-07-13 21:52:07,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:11,710 INFO L129 PetriNetUnfolder]: 3208/10876 cut-off events. [2022-07-13 21:52:11,711 INFO L130 PetriNetUnfolder]: For 147758/148017 co-relation queries the response was YES. [2022-07-13 21:52:11,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51864 conditions, 10876 events. 3208/10876 cut-off events. For 147758/148017 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 120520 event pairs, 1375 based on Foata normal form. 196/10815 useless extension candidates. Maximal degree in co-relation 51709. Up to 3232 conditions per place. [2022-07-13 21:52:11,858 INFO L132 encePairwiseOnDemand]: 163/186 looper letters, 608 selfloop transitions, 321 changer transitions 0/1022 dead transitions. [2022-07-13 21:52:11,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 1022 transitions, 23680 flow [2022-07-13 21:52:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 21:52:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-13 21:52:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1836 transitions. [2022-07-13 21:52:11,863 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5195246179966044 [2022-07-13 21:52:11,863 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1836 transitions. [2022-07-13 21:52:11,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1836 transitions. [2022-07-13 21:52:11,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:11,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1836 transitions. [2022-07-13 21:52:11,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 96.63157894736842) internal successors, (1836), 19 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:11,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:11,871 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:11,871 INFO L186 Difference]: Start difference. First operand has 510 places, 836 transitions, 18697 flow. Second operand 19 states and 1836 transitions. [2022-07-13 21:52:11,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 1022 transitions, 23680 flow [2022-07-13 21:52:12,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1022 transitions, 23344 flow, removed 115 selfloop flow, removed 7 redundant places. [2022-07-13 21:52:12,884 INFO L242 Difference]: Finished difference. Result has 529 places, 879 transitions, 20274 flow [2022-07-13 21:52:12,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=18370, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=20274, PETRI_PLACES=529, PETRI_TRANSITIONS=879} [2022-07-13 21:52:12,886 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 357 predicate places. [2022-07-13 21:52:12,886 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 879 transitions, 20274 flow [2022-07-13 21:52:12,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 92.93333333333334) internal successors, (1394), 15 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:12,886 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:12,886 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:12,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 21:52:12,886 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:52:12,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:12,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2115335721, now seen corresponding path program 17 times [2022-07-13 21:52:12,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:12,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294129517] [2022-07-13 21:52:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:12,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:52:13,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:13,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294129517] [2022-07-13 21:52:13,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294129517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:13,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:13,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:52:13,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231401767] [2022-07-13 21:52:13,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:13,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:52:13,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:13,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:52:13,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:52:13,230 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:52:13,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 879 transitions, 20274 flow. Second operand has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:13,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:13,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:52:13,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:18,256 INFO L129 PetriNetUnfolder]: 3592/11499 cut-off events. [2022-07-13 21:52:18,256 INFO L130 PetriNetUnfolder]: For 161628/161728 co-relation queries the response was YES. [2022-07-13 21:52:18,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57045 conditions, 11499 events. 3592/11499 cut-off events. For 161628/161728 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 125714 event pairs, 1433 based on Foata normal form. 47/11313 useless extension candidates. Maximal degree in co-relation 56881. Up to 3100 conditions per place. [2022-07-13 21:52:18,406 INFO L132 encePairwiseOnDemand]: 162/186 looper letters, 616 selfloop transitions, 330 changer transitions 0/1009 dead transitions. [2022-07-13 21:52:18,406 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 1009 transitions, 24130 flow [2022-07-13 21:52:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:52:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:52:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1992 transitions. [2022-07-13 21:52:18,408 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5099846390168971 [2022-07-13 21:52:18,408 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1992 transitions. [2022-07-13 21:52:18,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1992 transitions. [2022-07-13 21:52:18,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:18,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1992 transitions. [2022-07-13 21:52:18,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 94.85714285714286) internal successors, (1992), 21 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:18,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 186.0) internal successors, (4092), 22 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:18,414 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 186.0) internal successors, (4092), 22 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:18,414 INFO L186 Difference]: Start difference. First operand has 529 places, 879 transitions, 20274 flow. Second operand 21 states and 1992 transitions. [2022-07-13 21:52:18,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 1009 transitions, 24130 flow [2022-07-13 21:52:19,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 1009 transitions, 23674 flow, removed 143 selfloop flow, removed 8 redundant places. [2022-07-13 21:52:19,698 INFO L242 Difference]: Finished difference. Result has 550 places, 910 transitions, 21851 flow [2022-07-13 21:52:19,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=19946, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=879, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=21851, PETRI_PLACES=550, PETRI_TRANSITIONS=910} [2022-07-13 21:52:19,699 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 378 predicate places. [2022-07-13 21:52:19,700 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 910 transitions, 21851 flow [2022-07-13 21:52:19,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:19,700 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:19,700 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:19,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 21:52:19,700 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:52:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:19,701 INFO L85 PathProgramCache]: Analyzing trace with hash 888200449, now seen corresponding path program 18 times [2022-07-13 21:52:19,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:19,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978797332] [2022-07-13 21:52:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:19,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:52:20,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:20,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978797332] [2022-07-13 21:52:20,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978797332] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:20,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:20,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-13 21:52:20,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725359043] [2022-07-13 21:52:20,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:20,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 21:52:20,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:20,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 21:52:20,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-07-13 21:52:20,118 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:52:20,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 910 transitions, 21851 flow. Second operand has 19 states, 19 states have (on average 90.21052631578948) internal successors, (1714), 19 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:20,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:20,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:52:20,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:25,512 INFO L129 PetriNetUnfolder]: 3632/11698 cut-off events. [2022-07-13 21:52:25,513 INFO L130 PetriNetUnfolder]: For 176691/176727 co-relation queries the response was YES. [2022-07-13 21:52:25,643 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58578 conditions, 11698 events. 3632/11698 cut-off events. For 176691/176727 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 128683 event pairs, 1605 based on Foata normal form. 23/11447 useless extension candidates. Maximal degree in co-relation 58406. Up to 4027 conditions per place. [2022-07-13 21:52:25,672 INFO L132 encePairwiseOnDemand]: 161/186 looper letters, 711 selfloop transitions, 340 changer transitions 0/1114 dead transitions. [2022-07-13 21:52:25,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 1114 transitions, 27183 flow [2022-07-13 21:52:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:52:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:52:25,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2007 transitions. [2022-07-13 21:52:25,674 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5138248847926268 [2022-07-13 21:52:25,675 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2007 transitions. [2022-07-13 21:52:25,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2007 transitions. [2022-07-13 21:52:25,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:25,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2007 transitions. [2022-07-13 21:52:25,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 95.57142857142857) internal successors, (2007), 21 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:25,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 186.0) internal successors, (4092), 22 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:25,679 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 186.0) internal successors, (4092), 22 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:25,679 INFO L186 Difference]: Start difference. First operand has 550 places, 910 transitions, 21851 flow. Second operand 21 states and 2007 transitions. [2022-07-13 21:52:25,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 1114 transitions, 27183 flow [2022-07-13 21:52:27,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 1114 transitions, 26909 flow, removed 105 selfloop flow, removed 6 redundant places. [2022-07-13 21:52:27,053 INFO L242 Difference]: Finished difference. Result has 573 places, 943 transitions, 23449 flow [2022-07-13 21:52:27,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=21578, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=23449, PETRI_PLACES=573, PETRI_TRANSITIONS=943} [2022-07-13 21:52:27,054 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 401 predicate places. [2022-07-13 21:52:27,055 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 943 transitions, 23449 flow [2022-07-13 21:52:27,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.21052631578948) internal successors, (1714), 19 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:27,055 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:27,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:27,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 21:52:27,056 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:52:27,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:27,056 INFO L85 PathProgramCache]: Analyzing trace with hash -19772793, now seen corresponding path program 19 times [2022-07-13 21:52:27,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:27,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618708283] [2022-07-13 21:52:27,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:27,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:52:27,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:27,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618708283] [2022-07-13 21:52:27,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618708283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:27,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:27,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-13 21:52:27,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830708743] [2022-07-13 21:52:27,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:27,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 21:52:27,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:27,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 21:52:27,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-13 21:52:27,555 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:52:27,556 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 943 transitions, 23449 flow. Second operand has 19 states, 19 states have (on average 90.21052631578948) internal successors, (1714), 19 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:27,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:27,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:52:27,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:32,828 INFO L129 PetriNetUnfolder]: 3661/11917 cut-off events. [2022-07-13 21:52:32,829 INFO L130 PetriNetUnfolder]: For 200796/200824 co-relation queries the response was YES. [2022-07-13 21:52:32,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60418 conditions, 11917 events. 3661/11917 cut-off events. For 200796/200824 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 131058 event pairs, 1737 based on Foata normal form. 19/11667 useless extension candidates. Maximal degree in co-relation 60236. Up to 4027 conditions per place. [2022-07-13 21:52:33,025 INFO L132 encePairwiseOnDemand]: 161/186 looper letters, 687 selfloop transitions, 377 changer transitions 0/1127 dead transitions. [2022-07-13 21:52:33,025 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1127 transitions, 28515 flow [2022-07-13 21:52:33,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:52:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:52:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2000 transitions. [2022-07-13 21:52:33,027 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5120327700972862 [2022-07-13 21:52:33,027 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2000 transitions. [2022-07-13 21:52:33,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2000 transitions. [2022-07-13 21:52:33,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:33,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2000 transitions. [2022-07-13 21:52:33,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 95.23809523809524) internal successors, (2000), 21 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:33,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 186.0) internal successors, (4092), 22 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:33,032 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 186.0) internal successors, (4092), 22 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:33,032 INFO L186 Difference]: Start difference. First operand has 573 places, 943 transitions, 23449 flow. Second operand 21 states and 2000 transitions. [2022-07-13 21:52:33,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1127 transitions, 28515 flow [2022-07-13 21:52:34,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 1127 transitions, 28172 flow, removed 132 selfloop flow, removed 7 redundant places. [2022-07-13 21:52:34,582 INFO L242 Difference]: Finished difference. Result has 595 places, 973 transitions, 25082 flow [2022-07-13 21:52:34,583 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=23144, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=25082, PETRI_PLACES=595, PETRI_TRANSITIONS=973} [2022-07-13 21:52:34,583 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 423 predicate places. [2022-07-13 21:52:34,583 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 973 transitions, 25082 flow [2022-07-13 21:52:34,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.21052631578948) internal successors, (1714), 19 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:34,584 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:34,584 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:34,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 21:52:34,584 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:52:34,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:34,584 INFO L85 PathProgramCache]: Analyzing trace with hash -35127765, now seen corresponding path program 20 times [2022-07-13 21:52:34,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:34,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376734583] [2022-07-13 21:52:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:34,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:52:34,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:34,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376734583] [2022-07-13 21:52:34,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376734583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:34,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:34,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:52:34,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900795988] [2022-07-13 21:52:34,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:34,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:52:34,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:34,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:52:34,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:52:34,925 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:52:34,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 973 transitions, 25082 flow. Second operand has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:34,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:34,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:52:34,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:52:40,262 INFO L129 PetriNetUnfolder]: 3659/11956 cut-off events. [2022-07-13 21:52:40,262 INFO L130 PetriNetUnfolder]: For 218870/218898 co-relation queries the response was YES. [2022-07-13 21:52:40,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61850 conditions, 11956 events. 3659/11956 cut-off events. For 218870/218898 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 131661 event pairs, 1813 based on Foata normal form. 19/11692 useless extension candidates. Maximal degree in co-relation 61659. Up to 4027 conditions per place. [2022-07-13 21:52:40,718 INFO L132 encePairwiseOnDemand]: 161/186 looper letters, 714 selfloop transitions, 370 changer transitions 0/1147 dead transitions. [2022-07-13 21:52:40,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1147 transitions, 29943 flow [2022-07-13 21:52:40,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 21:52:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-13 21:52:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2099 transitions. [2022-07-13 21:52:40,720 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5129521016617791 [2022-07-13 21:52:40,720 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2099 transitions. [2022-07-13 21:52:40,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2099 transitions. [2022-07-13 21:52:40,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:52:40,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2099 transitions. [2022-07-13 21:52:40,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 95.4090909090909) internal successors, (2099), 22 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:40,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 186.0) internal successors, (4278), 23 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:40,724 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 186.0) internal successors, (4278), 23 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:40,725 INFO L186 Difference]: Start difference. First operand has 595 places, 973 transitions, 25082 flow. Second operand 22 states and 2099 transitions. [2022-07-13 21:52:40,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1147 transitions, 29943 flow [2022-07-13 21:52:42,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1147 transitions, 29656 flow, removed 61 selfloop flow, removed 8 redundant places. [2022-07-13 21:52:42,405 INFO L242 Difference]: Finished difference. Result has 615 places, 993 transitions, 26498 flow [2022-07-13 21:52:42,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=24805, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=973, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=26498, PETRI_PLACES=615, PETRI_TRANSITIONS=993} [2022-07-13 21:52:42,407 INFO L279 CegarLoopForPetriNet]: 172 programPoint places, 443 predicate places. [2022-07-13 21:52:42,407 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 993 transitions, 26498 flow [2022-07-13 21:52:42,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:42,407 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:52:42,407 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:52:42,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 21:52:42,407 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-13 21:52:42,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:52:42,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1298425653, now seen corresponding path program 21 times [2022-07-13 21:52:42,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:52:42,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409586705] [2022-07-13 21:52:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:52:42,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:52:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:52:42,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:42,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409586705] [2022-07-13 21:52:42,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409586705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:42,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:42,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-13 21:52:42,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16957380] [2022-07-13 21:52:42,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:42,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:52:42,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:42,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:52:42,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:52:42,750 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2022-07-13 21:52:42,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 993 transitions, 26498 flow. Second operand has 18 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:42,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:42,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2022-07-13 21:52:42,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand