./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-divine/barrier_2t.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-divine/barrier_2t.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 f16bd48636db1837ea8e0ca595ad8610f40d584c5526c4d4feced86ef6fdf308 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:14:52,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:14:52,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:14:52,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:14:52,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:14:52,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:14:52,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:14:52,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:14:52,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:14:52,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:14:52,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:14:52,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:14:52,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:14:52,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:14:52,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:14:52,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:14:52,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:14:52,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:14:52,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:14:52,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:14:52,276 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:14:52,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:14:52,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:14:52,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:14:52,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:14:52,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:14:52,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:14:52,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:14:52,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:14:52,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:14:52,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:14:52,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:14:52,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:14:52,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:14:52,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:14:52,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:14:52,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:14:52,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:14:52,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:14:52,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:14:52,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:14:52,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:14:52,298 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:14:52,325 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:14:52,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:14:52,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:14:52,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:14:52,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:14:52,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:14:52,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:14:52,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:14:52,328 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:14:52,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:14:52,329 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:14:52,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:14:52,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:14:52,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:14:52,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:14:52,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:14:52,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:14:52,330 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:14:52,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:14:52,331 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:14:52,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:14:52,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:14:52,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:14:52,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:14:52,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:14:52,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:14:52,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:14:52,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:14:52,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:14:52,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:14:52,333 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:14:52,333 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:14:52,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:14:52,334 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f16bd48636db1837ea8e0ca595ad8610f40d584c5526c4d4feced86ef6fdf308 [2022-07-19 21:14:52,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:14:52,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:14:52,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:14:52,592 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:14:52,593 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:14:52,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/barrier_2t.i [2022-07-19 21:14:52,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f659a9fa7/9c2951e4cb2e41e2aad045adeeddc32d/FLAG87b8d676f [2022-07-19 21:14:53,076 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:14:53,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i [2022-07-19 21:14:53,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f659a9fa7/9c2951e4cb2e41e2aad045adeeddc32d/FLAG87b8d676f [2022-07-19 21:14:53,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f659a9fa7/9c2951e4cb2e41e2aad045adeeddc32d [2022-07-19 21:14:53,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:14:53,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:14:53,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:14:53,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:14:53,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:14:53,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:14:53" (1/1) ... [2022-07-19 21:14:53,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb03a12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53, skipping insertion in model container [2022-07-19 21:14:53,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:14:53" (1/1) ... [2022-07-19 21:14:53,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:14:53,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:14:53,601 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-19 21:14:53,814 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[30484,30497] [2022-07-19 21:14:53,846 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[31858,31871] [2022-07-19 21:14:53,849 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[31909,31922] [2022-07-19 21:14:53,855 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32058,32071] [2022-07-19 21:14:53,856 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32135,32148] [2022-07-19 21:14:53,858 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32182,32195] [2022-07-19 21:14:53,859 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32291,32304] [2022-07-19 21:14:53,863 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32410,32423] [2022-07-19 21:14:53,864 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32458,32471] [2022-07-19 21:14:53,866 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32535,32548] [2022-07-19 21:14:53,868 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32661,32674] [2022-07-19 21:14:53,881 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[33244,33257] [2022-07-19 21:14:53,882 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[33321,33334] [2022-07-19 21:14:53,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:14:53,895 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:14:53,910 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-19 21:14:53,935 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[30484,30497] [2022-07-19 21:14:53,943 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[31858,31871] [2022-07-19 21:14:53,944 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[31909,31922] [2022-07-19 21:14:53,945 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32058,32071] [2022-07-19 21:14:53,946 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32135,32148] [2022-07-19 21:14:53,947 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32182,32195] [2022-07-19 21:14:53,949 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32291,32304] [2022-07-19 21:14:53,951 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32410,32423] [2022-07-19 21:14:53,952 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32458,32471] [2022-07-19 21:14:53,953 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32535,32548] [2022-07-19 21:14:53,955 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[32661,32674] [2022-07-19 21:14:53,968 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[33244,33257] [2022-07-19 21:14:53,969 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_2t.i[33321,33334] [2022-07-19 21:14:53,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:14:53,997 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:14:53,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53 WrapperNode [2022-07-19 21:14:53,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:14:53,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:14:53,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:14:53,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:14:54,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 21:14:54,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 21:14:54,059 INFO L137 Inliner]: procedures = 174, calls = 78, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 521 [2022-07-19 21:14:54,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:14:54,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:14:54,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:14:54,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:14:54,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 21:14:54,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 21:14:54,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 21:14:54,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 21:14:54,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 21:14:54,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 21:14:54,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 21:14:54,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:14:54,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:14:54,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:14:54,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:14:54,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (1/1) ... [2022-07-19 21:14:54,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:14:54,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:14:54,156 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) [2022-07-19 21:14:54,168 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 [2022-07-19 21:14:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:14:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:14:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:14:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure worker_fn [2022-07-19 21:14:54,191 INFO L138 BoogieDeclarations]: Found implementation of procedure worker_fn [2022-07-19 21:14:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:14:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 21:14:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:14:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 21:14:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:14:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:14:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:14:54,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:14:54,194 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:14:54,325 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:14:54,326 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:14:54,926 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:14:54,937 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:14:54,937 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2022-07-19 21:14:54,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:14:54 BoogieIcfgContainer [2022-07-19 21:14:54,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:14:54,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:14:54,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:14:54,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:14:54,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:14:53" (1/3) ... [2022-07-19 21:14:54,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecf7127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:14:54, skipping insertion in model container [2022-07-19 21:14:54,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:53" (2/3) ... [2022-07-19 21:14:54,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecf7127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:14:54, skipping insertion in model container [2022-07-19 21:14:54,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:14:54" (3/3) ... [2022-07-19 21:14:54,948 INFO L111 eAbstractionObserver]: Analyzing ICFG barrier_2t.i [2022-07-19 21:14:54,953 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:14:54,961 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:14:54,962 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-07-19 21:14:54,962 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:14:55,109 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 21:14:55,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 514 places, 581 transitions, 1170 flow [2022-07-19 21:14:55,469 INFO L129 PetriNetUnfolder]: 106/858 cut-off events. [2022-07-19 21:14:55,469 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:14:55,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 858 events. 106/858 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3081 event pairs, 0 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 512. Up to 4 conditions per place. [2022-07-19 21:14:55,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 514 places, 581 transitions, 1170 flow [2022-07-19 21:14:55,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 514 places, 581 transitions, 1170 flow [2022-07-19 21:14:55,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:14:55,534 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@24de0948, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2bbdffff [2022-07-19 21:14:55,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-07-19 21:14:55,541 INFO L129 PetriNetUnfolder]: 3/53 cut-off events. [2022-07-19 21:14:55,542 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:14:55,542 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:55,542 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] [2022-07-19 21:14:55,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-19 21:14:55,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:55,549 INFO L85 PathProgramCache]: Analyzing trace with hash 682126804, now seen corresponding path program 1 times [2022-07-19 21:14:55,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:55,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648743197] [2022-07-19 21:14:55,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:55,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:14:55,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:14:55,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648743197] [2022-07-19 21:14:55,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648743197] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:14:55,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:14:55,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:14:55,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013454248] [2022-07-19 21:14:55,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:14:55,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:14:55,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:14:55,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:14:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:14:55,827 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 536 out of 581 [2022-07-19 21:14:55,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 581 transitions, 1170 flow. Second operand has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:55,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:14:55,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 536 of 581 [2022-07-19 21:14:55,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:14:56,033 INFO L129 PetriNetUnfolder]: 40/792 cut-off events. [2022-07-19 21:14:56,033 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:14:56,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 792 events. 40/792 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2911 event pairs, 0 based on Foata normal form. 66/780 useless extension candidates. Maximal degree in co-relation 473. Up to 4 conditions per place. [2022-07-19 21:14:56,053 INFO L132 encePairwiseOnDemand]: 538/581 looper letters, 2 selfloop transitions, 0 changer transitions 0/538 dead transitions. [2022-07-19 21:14:56,054 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 538 transitions, 1088 flow [2022-07-19 21:14:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:14:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:14:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1117 transitions. [2022-07-19 21:14:56,083 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9612736660929432 [2022-07-19 21:14:56,084 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1117 transitions. [2022-07-19 21:14:56,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1117 transitions. [2022-07-19 21:14:56,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:14:56,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1117 transitions. [2022-07-19 21:14:56,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 558.5) internal successors, (1117), 2 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:56,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 581.0) internal successors, (1743), 3 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:56,109 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 581.0) internal successors, (1743), 3 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:56,112 INFO L186 Difference]: Start difference. First operand has 514 places, 581 transitions, 1170 flow. Second operand 2 states and 1117 transitions. [2022-07-19 21:14:56,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 538 transitions, 1088 flow [2022-07-19 21:14:56,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 538 transitions, 1088 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:14:56,164 INFO L242 Difference]: Finished difference. Result has 515 places, 538 transitions, 1084 flow [2022-07-19 21:14:56,166 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1084, PETRI_PLACES=515, PETRI_TRANSITIONS=538} [2022-07-19 21:14:56,169 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 1 predicate places. [2022-07-19 21:14:56,170 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 538 transitions, 1084 flow [2022-07-19 21:14:56,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:56,171 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:56,172 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] [2022-07-19 21:14:56,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:14:56,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-19 21:14:56,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:56,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1870030157, now seen corresponding path program 1 times [2022-07-19 21:14:56,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:56,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135162500] [2022-07-19 21:14:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:56,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:14:56,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:14:56,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135162500] [2022-07-19 21:14:56,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135162500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:14:56,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:14:56,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:14:56,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091758485] [2022-07-19 21:14:56,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:14:56,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:14:56,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:14:56,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:14:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:14:56,293 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 527 out of 581 [2022-07-19 21:14:56,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 538 transitions, 1084 flow. Second operand has 3 states, 3 states have (on average 528.0) internal successors, (1584), 3 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:56,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:14:56,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 527 of 581 [2022-07-19 21:14:56,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:14:56,528 INFO L129 PetriNetUnfolder]: 40/798 cut-off events. [2022-07-19 21:14:56,529 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:14:56,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 798 events. 40/798 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2909 event pairs, 0 based on Foata normal form. 0/720 useless extension candidates. Maximal degree in co-relation 819. Up to 12 conditions per place. [2022-07-19 21:14:56,541 INFO L132 encePairwiseOnDemand]: 578/581 looper letters, 15 selfloop transitions, 2 changer transitions 0/544 dead transitions. [2022-07-19 21:14:56,542 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 544 transitions, 1130 flow [2022-07-19 21:14:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:14:56,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:14:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1599 transitions. [2022-07-19 21:14:56,546 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9173838209982789 [2022-07-19 21:14:56,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1599 transitions. [2022-07-19 21:14:56,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1599 transitions. [2022-07-19 21:14:56,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:14:56,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1599 transitions. [2022-07-19 21:14:56,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 533.0) internal successors, (1599), 3 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:56,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:56,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:56,557 INFO L186 Difference]: Start difference. First operand has 515 places, 538 transitions, 1084 flow. Second operand 3 states and 1599 transitions. [2022-07-19 21:14:56,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 544 transitions, 1130 flow [2022-07-19 21:14:56,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 544 transitions, 1130 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:14:56,567 INFO L242 Difference]: Finished difference. Result has 518 places, 539 transitions, 1096 flow [2022-07-19 21:14:56,568 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1096, PETRI_PLACES=518, PETRI_TRANSITIONS=539} [2022-07-19 21:14:56,569 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 4 predicate places. [2022-07-19 21:14:56,569 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 539 transitions, 1096 flow [2022-07-19 21:14:56,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 528.0) internal successors, (1584), 3 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:56,570 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:56,570 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] [2022-07-19 21:14:56,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:14:56,571 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-19 21:14:56,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:56,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1201829103, now seen corresponding path program 1 times [2022-07-19 21:14:56,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:56,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887771114] [2022-07-19 21:14:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:56,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:14:56,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:14:56,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887771114] [2022-07-19 21:14:56,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887771114] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:14:56,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665175491] [2022-07-19 21:14:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:56,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:14:56,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:14:56,634 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:14:56,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:14:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:56,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 21:14:56,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:14:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:14:56,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:14:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:14:56,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665175491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:14:56,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:14:56,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-07-19 21:14:56,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347325051] [2022-07-19 21:14:56,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:14:56,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:14:56,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:14:56,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:14:56,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:14:56,932 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 527 out of 581 [2022-07-19 21:14:56,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 539 transitions, 1096 flow. Second operand has 5 states, 5 states have (on average 530.2) internal successors, (2651), 5 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:56,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:14:56,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 527 of 581 [2022-07-19 21:14:56,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:14:57,118 INFO L129 PetriNetUnfolder]: 40/800 cut-off events. [2022-07-19 21:14:57,119 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-19 21:14:57,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 800 events. 40/800 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2900 event pairs, 0 based on Foata normal form. 1/724 useless extension candidates. Maximal degree in co-relation 827. Up to 7 conditions per place. [2022-07-19 21:14:57,135 INFO L132 encePairwiseOnDemand]: 577/581 looper letters, 14 selfloop transitions, 4 changer transitions 0/545 dead transitions. [2022-07-19 21:14:57,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 545 transitions, 1144 flow [2022-07-19 21:14:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:14:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:14:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2127 transitions. [2022-07-19 21:14:57,141 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9152323580034424 [2022-07-19 21:14:57,141 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2127 transitions. [2022-07-19 21:14:57,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2127 transitions. [2022-07-19 21:14:57,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:14:57,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2127 transitions. [2022-07-19 21:14:57,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 531.75) internal successors, (2127), 4 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:57,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:57,153 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:57,153 INFO L186 Difference]: Start difference. First operand has 518 places, 539 transitions, 1096 flow. Second operand 4 states and 2127 transitions. [2022-07-19 21:14:57,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 545 transitions, 1144 flow [2022-07-19 21:14:57,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 545 transitions, 1142 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:14:57,163 INFO L242 Difference]: Finished difference. Result has 522 places, 540 transitions, 1114 flow [2022-07-19 21:14:57,164 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1114, PETRI_PLACES=522, PETRI_TRANSITIONS=540} [2022-07-19 21:14:57,166 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 8 predicate places. [2022-07-19 21:14:57,166 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 540 transitions, 1114 flow [2022-07-19 21:14:57,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 530.2) internal successors, (2651), 5 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:57,168 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:57,169 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:14:57,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:14:57,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:14:57,383 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-19 21:14:57,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:57,384 INFO L85 PathProgramCache]: Analyzing trace with hash -24715469, now seen corresponding path program 2 times [2022-07-19 21:14:57,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:57,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934909195] [2022-07-19 21:14:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:57,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:14:57,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:14:57,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934909195] [2022-07-19 21:14:57,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934909195] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:14:57,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:14:57,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:14:57,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527399827] [2022-07-19 21:14:57,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:14:57,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:14:57,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:14:57,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:14:57,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:14:57,486 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 530 out of 581 [2022-07-19 21:14:57,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 540 transitions, 1114 flow. Second operand has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:57,489 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:14:57,489 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 530 of 581 [2022-07-19 21:14:57,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:14:57,641 INFO L129 PetriNetUnfolder]: 40/798 cut-off events. [2022-07-19 21:14:57,641 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-19 21:14:57,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 798 events. 40/798 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2897 event pairs, 0 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 823. Up to 5 conditions per place. [2022-07-19 21:14:57,660 INFO L132 encePairwiseOnDemand]: 578/581 looper letters, 5 selfloop transitions, 2 changer transitions 0/538 dead transitions. [2022-07-19 21:14:57,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 538 transitions, 1124 flow [2022-07-19 21:14:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:14:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:14:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2128 transitions. [2022-07-19 21:14:57,665 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9156626506024096 [2022-07-19 21:14:57,665 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2128 transitions. [2022-07-19 21:14:57,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2128 transitions. [2022-07-19 21:14:57,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:14:57,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2128 transitions. [2022-07-19 21:14:57,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:57,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:57,677 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:57,678 INFO L186 Difference]: Start difference. First operand has 522 places, 540 transitions, 1114 flow. Second operand 4 states and 2128 transitions. [2022-07-19 21:14:57,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 538 transitions, 1124 flow [2022-07-19 21:14:57,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 538 transitions, 1120 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-19 21:14:57,691 INFO L242 Difference]: Finished difference. Result has 522 places, 538 transitions, 1110 flow [2022-07-19 21:14:57,692 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1110, PETRI_PLACES=522, PETRI_TRANSITIONS=538} [2022-07-19 21:14:57,693 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 8 predicate places. [2022-07-19 21:14:57,693 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 538 transitions, 1110 flow [2022-07-19 21:14:57,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 531.0) internal successors, (2124), 4 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:57,695 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:57,695 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:14:57,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:14:57,696 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-19 21:14:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:57,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1817996092, now seen corresponding path program 1 times [2022-07-19 21:14:57,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:57,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580315347] [2022-07-19 21:14:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:57,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:14:57,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:14:57,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580315347] [2022-07-19 21:14:57,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580315347] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:14:57,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917087252] [2022-07-19 21:14:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:57,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:14:57,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:14:57,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:14:57,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:14:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:58,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 21:14:58,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:14:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:14:58,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:14:58,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917087252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:14:58,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:14:58,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-07-19 21:14:58,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640307043] [2022-07-19 21:14:58,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:14:58,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:14:58,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:14:58,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:14:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:14:58,060 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 581 [2022-07-19 21:14:58,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 538 transitions, 1110 flow. Second operand has 4 states, 4 states have (on average 531.25) internal successors, (2125), 4 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:58,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:14:58,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 581 [2022-07-19 21:14:58,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:14:58,240 INFO L129 PetriNetUnfolder]: 40/793 cut-off events. [2022-07-19 21:14:58,240 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:14:58,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 793 events. 40/793 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2863 event pairs, 0 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 820. Up to 5 conditions per place. [2022-07-19 21:14:58,255 INFO L132 encePairwiseOnDemand]: 577/581 looper letters, 7 selfloop transitions, 3 changer transitions 0/538 dead transitions. [2022-07-19 21:14:58,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 538 transitions, 1128 flow [2022-07-19 21:14:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:14:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:14:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2127 transitions. [2022-07-19 21:14:58,260 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9152323580034424 [2022-07-19 21:14:58,261 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2127 transitions. [2022-07-19 21:14:58,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2127 transitions. [2022-07-19 21:14:58,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:14:58,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2127 transitions. [2022-07-19 21:14:58,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 531.75) internal successors, (2127), 4 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:58,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:58,273 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 581.0) internal successors, (2905), 5 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:58,273 INFO L186 Difference]: Start difference. First operand has 522 places, 538 transitions, 1110 flow. Second operand 4 states and 2127 transitions. [2022-07-19 21:14:58,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 538 transitions, 1128 flow [2022-07-19 21:14:58,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 538 transitions, 1121 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:14:58,284 INFO L242 Difference]: Finished difference. Result has 522 places, 538 transitions, 1116 flow [2022-07-19 21:14:58,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1116, PETRI_PLACES=522, PETRI_TRANSITIONS=538} [2022-07-19 21:14:58,286 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 8 predicate places. [2022-07-19 21:14:58,286 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 538 transitions, 1116 flow [2022-07-19 21:14:58,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 531.25) internal successors, (2125), 4 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:58,287 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:58,288 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:14:58,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:14:58,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:14:58,512 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-19 21:14:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1162500929, now seen corresponding path program 1 times [2022-07-19 21:14:58,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:58,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479755903] [2022-07-19 21:14:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:58,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:14:59,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:14:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479755903] [2022-07-19 21:14:59,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479755903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:14:59,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:14:59,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-19 21:14:59,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187611978] [2022-07-19 21:14:59,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:14:59,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 21:14:59,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:14:59,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 21:14:59,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-19 21:14:59,379 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 581 [2022-07-19 21:14:59,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 538 transitions, 1116 flow. Second operand has 17 states, 17 states have (on average 398.6470588235294) internal successors, (6777), 17 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:14:59,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:14:59,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 581 [2022-07-19 21:14:59,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:02,721 INFO L129 PetriNetUnfolder]: 3485/15852 cut-off events. [2022-07-19 21:15:02,722 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:15:02,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21612 conditions, 15852 events. 3485/15852 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 162984 event pairs, 1605 based on Foata normal form. 0/14208 useless extension candidates. Maximal degree in co-relation 21603. Up to 4593 conditions per place. [2022-07-19 21:15:02,834 INFO L132 encePairwiseOnDemand]: 563/581 looper letters, 265 selfloop transitions, 21 changer transitions 0/682 dead transitions. [2022-07-19 21:15:02,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 682 transitions, 1976 flow [2022-07-19 21:15:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:15:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:15:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 6230 transitions. [2022-07-19 21:15:02,849 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.714859437751004 [2022-07-19 21:15:02,849 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 6230 transitions. [2022-07-19 21:15:02,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 6230 transitions. [2022-07-19 21:15:02,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:02,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 6230 transitions. [2022-07-19 21:15:02,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 415.3333333333333) internal successors, (6230), 15 states have internal predecessors, (6230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:02,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 581.0) internal successors, (9296), 16 states have internal predecessors, (9296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:02,885 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 581.0) internal successors, (9296), 16 states have internal predecessors, (9296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:02,886 INFO L186 Difference]: Start difference. First operand has 522 places, 538 transitions, 1116 flow. Second operand 15 states and 6230 transitions. [2022-07-19 21:15:02,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 682 transitions, 1976 flow [2022-07-19 21:15:02,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 682 transitions, 1975 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:15:02,898 INFO L242 Difference]: Finished difference. Result has 540 places, 549 transitions, 1221 flow [2022-07-19 21:15:02,899 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1221, PETRI_PLACES=540, PETRI_TRANSITIONS=549} [2022-07-19 21:15:02,900 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 26 predicate places. [2022-07-19 21:15:02,900 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 549 transitions, 1221 flow [2022-07-19 21:15:02,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 398.6470588235294) internal successors, (6777), 17 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:02,903 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:02,904 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:02,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:15:02,904 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-19 21:15:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:02,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1614772030, now seen corresponding path program 1 times [2022-07-19 21:15:02,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:02,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334981980] [2022-07-19 21:15:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:02,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:02,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:02,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334981980] [2022-07-19 21:15:02,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334981980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:02,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:02,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:15:02,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373622305] [2022-07-19 21:15:02,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:02,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:15:02,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:02,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:15:02,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:15:02,955 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 581 [2022-07-19 21:15:02,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 549 transitions, 1221 flow. Second operand has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:02,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:02,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 581 [2022-07-19 21:15:02,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:03,241 INFO L129 PetriNetUnfolder]: 89/1606 cut-off events. [2022-07-19 21:15:03,241 INFO L130 PetriNetUnfolder]: For 28/30 co-relation queries the response was YES. [2022-07-19 21:15:03,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 1606 events. 89/1606 cut-off events. For 28/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 9185 event pairs, 0 based on Foata normal form. 1/1447 useless extension candidates. Maximal degree in co-relation 1696. Up to 12 conditions per place. [2022-07-19 21:15:03,262 INFO L132 encePairwiseOnDemand]: 578/581 looper letters, 7 selfloop transitions, 2 changer transitions 0/548 dead transitions. [2022-07-19 21:15:03,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 548 transitions, 1233 flow [2022-07-19 21:15:03,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:15:03,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:15:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1597 transitions. [2022-07-19 21:15:03,267 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9162363740676994 [2022-07-19 21:15:03,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1597 transitions. [2022-07-19 21:15:03,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1597 transitions. [2022-07-19 21:15:03,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:03,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1597 transitions. [2022-07-19 21:15:03,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 532.3333333333334) internal successors, (1597), 3 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:03,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:03,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 581.0) internal successors, (2324), 4 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:03,276 INFO L186 Difference]: Start difference. First operand has 540 places, 549 transitions, 1221 flow. Second operand 3 states and 1597 transitions. [2022-07-19 21:15:03,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 548 transitions, 1233 flow [2022-07-19 21:15:03,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 548 transitions, 1214 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-07-19 21:15:03,290 INFO L242 Difference]: Finished difference. Result has 533 places, 548 transitions, 1200 flow [2022-07-19 21:15:03,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1200, PETRI_PLACES=533, PETRI_TRANSITIONS=548} [2022-07-19 21:15:03,292 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 19 predicate places. [2022-07-19 21:15:03,292 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 548 transitions, 1200 flow [2022-07-19 21:15:03,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:03,293 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:03,293 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:03,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:15:03,294 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting worker_fnErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-19 21:15:03,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:03,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1746328945, now seen corresponding path program 1 times [2022-07-19 21:15:03,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:03,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734186671] [2022-07-19 21:15:03,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:03,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:04,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:04,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734186671] [2022-07-19 21:15:04,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734186671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:04,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:04,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-19 21:15:04,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50130595] [2022-07-19 21:15:04,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:04,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:15:04,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:04,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:15:04,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:15:04,072 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 581 [2022-07-19 21:15:04,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 548 transitions, 1200 flow. Second operand has 18 states, 18 states have (on average 398.55555555555554) internal successors, (7174), 18 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:04,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:04,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 581 [2022-07-19 21:15:04,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:07,260 INFO L129 PetriNetUnfolder]: 3458/16435 cut-off events. [2022-07-19 21:15:07,261 INFO L130 PetriNetUnfolder]: For 536/538 co-relation queries the response was YES. [2022-07-19 21:15:07,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22739 conditions, 16435 events. 3458/16435 cut-off events. For 536/538 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 170190 event pairs, 1671 based on Foata normal form. 0/14790 useless extension candidates. Maximal degree in co-relation 22725. Up to 4595 conditions per place. [2022-07-19 21:15:07,366 INFO L132 encePairwiseOnDemand]: 563/581 looper letters, 264 selfloop transitions, 24 changer transitions 0/686 dead transitions. [2022-07-19 21:15:07,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 686 transitions, 2072 flow [2022-07-19 21:15:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 21:15:07,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-19 21:15:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 6625 transitions. [2022-07-19 21:15:07,381 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7126721170395869 [2022-07-19 21:15:07,382 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 6625 transitions. [2022-07-19 21:15:07,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 6625 transitions. [2022-07-19 21:15:07,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:07,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 6625 transitions. [2022-07-19 21:15:07,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 414.0625) internal successors, (6625), 16 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:07,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 581.0) internal successors, (9877), 17 states have internal predecessors, (9877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:07,415 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 581.0) internal successors, (9877), 17 states have internal predecessors, (9877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:07,416 INFO L186 Difference]: Start difference. First operand has 533 places, 548 transitions, 1200 flow. Second operand 16 states and 6625 transitions. [2022-07-19 21:15:07,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 686 transitions, 2072 flow [2022-07-19 21:15:07,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 686 transitions, 2068 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:15:07,433 INFO L242 Difference]: Finished difference. Result has 550 places, 554 transitions, 1288 flow [2022-07-19 21:15:07,434 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1288, PETRI_PLACES=550, PETRI_TRANSITIONS=554} [2022-07-19 21:15:07,436 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 36 predicate places. [2022-07-19 21:15:07,436 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 554 transitions, 1288 flow [2022-07-19 21:15:07,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 398.55555555555554) internal successors, (7174), 18 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:07,438 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:07,439 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:07,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:15:07,439 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-19 21:15:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:07,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1091126161, now seen corresponding path program 1 times [2022-07-19 21:15:07,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:07,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122111210] [2022-07-19 21:15:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:07,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:08,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:08,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122111210] [2022-07-19 21:15:08,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122111210] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:08,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598662247] [2022-07-19 21:15:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:08,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:08,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:08,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:15:08,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:15:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:08,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-19 21:15:08,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:08,736 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 21:15:08,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-19 21:15:08,819 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 21:15:08,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-19 21:15:08,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-19 21:15:08,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-19 21:15:08,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-19 21:15:09,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-19 21:15:09,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-19 21:15:09,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-19 21:15:09,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-19 21:15:09,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-19 21:15:09,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-19 21:15:09,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-19 21:15:09,495 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:15:09,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 21:15:09,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-19 21:15:09,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:15:09,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-19 21:15:09,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-19 21:15:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:15:09,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:10,129 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_661 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_~#pre~0.base| v_ArrVal_661) |c_~#in~0.base|))) (or (not (<= (mod (select .cse0 |c_~#in~0.offset|) 256) 0)) (= (mod (select .cse0 (+ |c_~#in~0.offset| 1)) 256) 0)))) is different from false [2022-07-19 21:15:10,189 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_661 (Array Int Int)) (v_ArrVal_660 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#worker~0#1.base| v_ArrVal_660) |c_~#pre~0.base| v_ArrVal_661) |c_~#in~0.base|))) (or (not (<= (mod (select .cse0 |c_~#in~0.offset|) 256) 0)) (= (mod (select .cse0 (+ |c_~#in~0.offset| 1)) 256) 0)))) is different from false [2022-07-19 21:15:11,908 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:11,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9534 treesize of output 9364 [2022-07-19 21:15:12,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:15:12,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 6674 treesize of output 6578 [2022-07-19 21:15:12,464 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:12,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8892 treesize of output 8508 [2022-07-19 21:15:12,535 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:12,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8508 treesize of output 7740 [2022-07-19 21:15:12,615 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:12,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7740 treesize of output 7548 [2022-07-19 21:16:59,468 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:16:59,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 220 treesize of output 372 [2022-07-19 21:17:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:17:00,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598662247] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:17:00,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:17:00,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 21] total 53 [2022-07-19 21:17:00,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959836138] [2022-07-19 21:17:00,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:17:00,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 21:17:00,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:17:00,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 21:17:00,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2090, Unknown=47, NotChecked=198, Total=2756 [2022-07-19 21:17:00,100 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 581 [2022-07-19 21:17:00,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 554 transitions, 1288 flow. Second operand has 53 states, 53 states have (on average 398.6981132075472) internal successors, (21131), 53 states have internal predecessors, (21131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:00,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:17:00,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 581 [2022-07-19 21:17:00,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:17:06,980 INFO L129 PetriNetUnfolder]: 6657/31137 cut-off events. [2022-07-19 21:17:06,980 INFO L130 PetriNetUnfolder]: For 2895/2895 co-relation queries the response was YES. [2022-07-19 21:17:07,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44322 conditions, 31137 events. 6657/31137 cut-off events. For 2895/2895 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 372694 event pairs, 3476 based on Foata normal form. 67/28300 useless extension candidates. Maximal degree in co-relation 44304. Up to 5045 conditions per place. [2022-07-19 21:17:07,342 INFO L132 encePairwiseOnDemand]: 547/581 looper letters, 574 selfloop transitions, 95 changer transitions 0/1067 dead transitions. [2022-07-19 21:17:07,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1067 transitions, 3779 flow [2022-07-19 21:17:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 21:17:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-19 21:17:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 12944 transitions. [2022-07-19 21:17:07,367 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.718671922713897 [2022-07-19 21:17:07,367 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 12944 transitions. [2022-07-19 21:17:07,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 12944 transitions. [2022-07-19 21:17:07,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:17:07,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 12944 transitions. [2022-07-19 21:17:07,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 417.5483870967742) internal successors, (12944), 31 states have internal predecessors, (12944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:07,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 581.0) internal successors, (18592), 32 states have internal predecessors, (18592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:07,432 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 581.0) internal successors, (18592), 32 states have internal predecessors, (18592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:07,433 INFO L186 Difference]: Start difference. First operand has 550 places, 554 transitions, 1288 flow. Second operand 31 states and 12944 transitions. [2022-07-19 21:17:07,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1067 transitions, 3779 flow [2022-07-19 21:17:07,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1067 transitions, 3738 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-07-19 21:17:07,463 INFO L242 Difference]: Finished difference. Result has 581 places, 624 transitions, 1928 flow [2022-07-19 21:17:07,465 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=581, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1928, PETRI_PLACES=581, PETRI_TRANSITIONS=624} [2022-07-19 21:17:07,465 INFO L279 CegarLoopForPetriNet]: 514 programPoint places, 67 predicate places. [2022-07-19 21:17:07,466 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 624 transitions, 1928 flow [2022-07-19 21:17:07,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 398.6981132075472) internal successors, (21131), 53 states have internal predecessors, (21131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:17:07,472 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:17:07,473 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:17:07,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:17:07,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:17:07,686 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-19 21:17:07,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:17:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash 604174216, now seen corresponding path program 1 times [2022-07-19 21:17:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:17:07,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959923834] [2022-07-19 21:17:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:17:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:17:08,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:17:08,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959923834] [2022-07-19 21:17:08,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959923834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:17:08,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78928260] [2022-07-19 21:17:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:17:08,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:17:08,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:17:08,290 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:17:08,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:17:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:17:08,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 21:17:08,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:17:08,641 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 21:17:08,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-19 21:17:08,703 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-19 21:17:08,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-19 21:17:08,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 21:17:08,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 21:17:08,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 21:17:08,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 21:17:08,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 21:17:08,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 21:17:09,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 21:17:09,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 21:17:09,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 21:17:09,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 21:17:09,308 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-19 21:17:09,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-19 21:17:09,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 21:17:09,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:17:09,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 21:17:09,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 21:17:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:17:09,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:17:09,530 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_835 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| |c_~#pre~0.base| v_ArrVal_835) |c_~#in~0.base|) |c_~#in~0.offset|) 256) 0)) is different from false [2022-07-19 21:17:09,587 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_834 (Array Int Int)) (v_ArrVal_835 (Array Int Int))) (= (mod (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#worker~0#1.base| v_ArrVal_834) |c_~#pre~0.base| v_ArrVal_835) |c_~#in~0.base|) |c_~#in~0.offset|) 256) 0)) is different from false [2022-07-19 21:17:10,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8766 treesize of output 8634 [2022-07-19 21:17:10,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4155 treesize of output 4027 [2022-07-19 21:17:10,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8182 treesize of output 8118 [2022-07-19 21:17:10,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8118 treesize of output 7862 [2022-07-19 21:17:10,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7862 treesize of output 7350