./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-divine/barrier_3t.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_3t.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 116240ce9d1e33454ba4eae840c2d7b67606f3cd4ffa1a06798f06dcbc1241fc --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:29:54,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:29:54,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:29:54,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:29:54,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:29:54,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:29:54,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:29:54,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:29:54,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:29:54,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:29:54,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:29:54,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:29:54,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:29:54,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:29:54,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:29:54,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:29:54,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:29:54,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:29:54,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:29:54,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:29:54,747 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:29:54,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:29:54,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:29:54,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:29:54,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:29:54,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:29:54,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:29:54,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:29:54,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:29:54,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:29:54,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:29:54,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:29:54,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:29:54,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:29:54,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:29:54,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:29:54,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:29:54,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:29:54,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:29:54,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:29:54,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:29:54,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:29:54,765 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:29:54,790 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:29:54,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:29:54,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:29:54,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:29:54,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:29:54,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:29:54,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:29:54,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:29:54,794 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:29:54,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:29:54,794 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:29:54,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:29:54,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:29:54,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:29:54,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:29:54,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:29:54,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:29:54,795 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:29:54,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:29:54,796 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:29:54,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:29:54,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:29:54,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:29:54,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:29:54,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:29:54,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:29:54,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:29:54,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:29:54,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:29:54,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:29:54,797 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:29:54,798 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:29:54,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:29:54,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 116240ce9d1e33454ba4eae840c2d7b67606f3cd4ffa1a06798f06dcbc1241fc [2022-07-22 21:29:54,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:29:54,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:29:54,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:29:54,985 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:29:54,985 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:29:54,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/barrier_3t.i [2022-07-22 21:29:55,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38add87df/d5c7bc4ca0a4407b94b47d6db8800f9c/FLAGccddb72ab [2022-07-22 21:29:55,486 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:29:55,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_3t.i [2022-07-22 21:29:55,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38add87df/d5c7bc4ca0a4407b94b47d6db8800f9c/FLAGccddb72ab [2022-07-22 21:29:55,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38add87df/d5c7bc4ca0a4407b94b47d6db8800f9c [2022-07-22 21:29:55,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:29:55,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:29:55,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:29:55,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:29:55,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:29:55,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:29:55" (1/1) ... [2022-07-22 21:29:55,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76e90b5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:55, skipping insertion in model container [2022-07-22 21:29:55,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:29:55" (1/1) ... [2022-07-22 21:29:55,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:29:55,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:29:55,694 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-22 21:29:55,817 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_3t.i[30484,30497] [2022-07-22 21:29:55,831 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_3t.i[31858,31871] [2022-07-22 21:29:55,833 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_3t.i[31909,31922] [2022-07-22 21:29:55,834 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_3t.i[32058,32071] [2022-07-22 21:29:55,835 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_3t.i[32135,32148] [2022-07-22 21:29:55,837 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_3t.i[32182,32195] [2022-07-22 21:29:55,838 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/barrier_3t.i[32291,32304] [2022-07-22 21:29:55,840 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_3t.i[32410,32423] [2022-07-22 21:29:55,841 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_3t.i[32458,32471] [2022-07-22 21:29:55,843 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_3t.i[32535,32548] [2022-07-22 21:29:55,847 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_3t.i[32661,32674] [2022-07-22 21:29:55,852 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_3t.i[33244,33257] [2022-07-22 21:29:55,853 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_3t.i[33321,33334] [2022-07-22 21:29:55,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:29:55,859 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:29:55,867 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-22 21:29:55,883 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_3t.i[30484,30497] [2022-07-22 21:29:55,903 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_3t.i[31858,31871] [2022-07-22 21:29:55,906 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_3t.i[31909,31922] [2022-07-22 21:29:55,908 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_3t.i[32058,32071] [2022-07-22 21:29:55,909 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_3t.i[32135,32148] [2022-07-22 21:29:55,911 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_3t.i[32182,32195] [2022-07-22 21:29:55,912 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_3t.i[32291,32304] [2022-07-22 21:29:55,915 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_3t.i[32410,32423] [2022-07-22 21:29:55,916 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_3t.i[32458,32471] [2022-07-22 21:29:55,917 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_3t.i[32535,32548] [2022-07-22 21:29:55,920 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_3t.i[32661,32674] [2022-07-22 21:29:55,926 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_3t.i[33244,33257] [2022-07-22 21:29:55,927 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_3t.i[33321,33334] [2022-07-22 21:29:55,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:29:55,960 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:29:55,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:55 WrapperNode [2022-07-22 21:29:55,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:29:55,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:29:55,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:29:55,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:29:55,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:55" (1/1) ... [2022-07-22 21:29:55,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:55" (1/1) ... [2022-07-22 21:29:56,051 INFO L137 Inliner]: procedures = 174, calls = 83, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 526 [2022-07-22 21:29:56,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:29:56,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:29:56,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:29:56,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:29:56,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:55" (1/1) ... [2022-07-22 21:29:56,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:55" (1/1) ... [2022-07-22 21:29:56,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:55" (1/1) ... [2022-07-22 21:29:56,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:55" (1/1) ... [2022-07-22 21:29:56,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:55" (1/1) ... [2022-07-22 21:29:56,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:55" (1/1) ... [2022-07-22 21:29:56,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:55" (1/1) ... [2022-07-22 21:29:56,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:29:56,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:29:56,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:29:56,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:29:56,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:55" (1/1) ... [2022-07-22 21:29:56,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:29:56,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:29:56,151 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) [2022-07-22 21:29:56,154 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 [2022-07-22 21:29:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:29:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:29:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:29:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure worker_fn [2022-07-22 21:29:56,177 INFO L138 BoogieDeclarations]: Found implementation of procedure worker_fn [2022-07-22 21:29:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:29:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 21:29:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:29:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 21:29:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:29:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:29:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:29:56,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:29:56,179 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:29:56,292 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:29:56,293 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:29:56,822 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:29:56,831 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:29:56,835 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2022-07-22 21:29:56,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:29:56 BoogieIcfgContainer [2022-07-22 21:29:56,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:29:56,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:29:56,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:29:56,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:29:56,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:29:55" (1/3) ... [2022-07-22 21:29:56,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c42952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:29:56, skipping insertion in model container [2022-07-22 21:29:56,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:55" (2/3) ... [2022-07-22 21:29:56,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c42952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:29:56, skipping insertion in model container [2022-07-22 21:29:56,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:29:56" (3/3) ... [2022-07-22 21:29:56,845 INFO L111 eAbstractionObserver]: Analyzing ICFG barrier_3t.i [2022-07-22 21:29:56,849 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:29:56,856 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:29:56,856 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-07-22 21:29:56,856 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:29:56,945 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-22 21:29:56,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 519 places, 586 transitions, 1180 flow [2022-07-22 21:29:57,277 INFO L129 PetriNetUnfolder]: 106/863 cut-off events. [2022-07-22 21:29:57,278 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:29:57,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 869 conditions, 863 events. 106/863 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. 0/719 useless extension candidates. Maximal degree in co-relation 512. Up to 4 conditions per place. [2022-07-22 21:29:57,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 519 places, 586 transitions, 1180 flow [2022-07-22 21:29:57,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 519 places, 586 transitions, 1180 flow [2022-07-22 21:29:57,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:29:57,364 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@7cc514a6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6928dcb8 [2022-07-22 21:29:57,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-07-22 21:29:57,370 INFO L129 PetriNetUnfolder]: 3/59 cut-off events. [2022-07-22 21:29:57,371 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:29:57,371 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:29:57,371 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] [2022-07-22 21:29:57,372 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)] === [2022-07-22 21:29:57,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:29:57,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1596734137, now seen corresponding path program 1 times [2022-07-22 21:29:57,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:29:57,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754592950] [2022-07-22 21:29:57,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:29:57,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:29:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:29:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:29:57,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:29:57,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754592950] [2022-07-22 21:29:57,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754592950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:29:57,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:29:57,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:29:57,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45649941] [2022-07-22 21:29:57,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:29:57,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:29:57,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:29:57,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:29:57,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:29:57,690 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 532 out of 586 [2022-07-22 21:29:57,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 586 transitions, 1180 flow. Second operand has 3 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) [2022-07-22 21:29:57,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:29:57,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 532 of 586 [2022-07-22 21:29:57,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:29:57,930 INFO L129 PetriNetUnfolder]: 40/803 cut-off events. [2022-07-22 21:29:57,930 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:29:57,953 INFO L84 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 803 events. 40/803 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2919 event pairs, 0 based on Foata normal form. 65/790 useless extension candidates. Maximal degree in co-relation 473. Up to 12 conditions per place. [2022-07-22 21:29:57,957 INFO L132 encePairwiseOnDemand]: 540/586 looper letters, 15 selfloop transitions, 2 changer transitions 0/549 dead transitions. [2022-07-22 21:29:57,957 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 549 transitions, 1140 flow [2022-07-22 21:29:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:29:57,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:29:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1658 transitions. [2022-07-22 21:29:57,982 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9431171786120591 [2022-07-22 21:29:57,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1658 transitions. [2022-07-22 21:29:57,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1658 transitions. [2022-07-22 21:29:57,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:29:57,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1658 transitions. [2022-07-22 21:29:57,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 552.6666666666666) internal successors, (1658), 3 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:58,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 586.0) internal successors, (2344), 4 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:58,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 586.0) internal successors, (2344), 4 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:58,004 INFO L186 Difference]: Start difference. First operand has 519 places, 586 transitions, 1180 flow. Second operand 3 states and 1658 transitions. [2022-07-22 21:29:58,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 549 transitions, 1140 flow [2022-07-22 21:29:58,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 549 transitions, 1140 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:29:58,023 INFO L242 Difference]: Finished difference. Result has 522 places, 544 transitions, 1106 flow [2022-07-22 21:29:58,025 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=586, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1106, PETRI_PLACES=522, PETRI_TRANSITIONS=544} [2022-07-22 21:29:58,029 INFO L279 CegarLoopForPetriNet]: 519 programPoint places, 3 predicate places. [2022-07-22 21:29:58,030 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 544 transitions, 1106 flow [2022-07-22 21:29:58,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-07-22 21:29:58,031 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:29:58,031 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:29:58,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:29:58,035 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)] === [2022-07-22 21:29:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:29:58,036 INFO L85 PathProgramCache]: Analyzing trace with hash -95295206, now seen corresponding path program 1 times [2022-07-22 21:29:58,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:29:58,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686484204] [2022-07-22 21:29:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:29:58,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:29:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:29:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:29:58,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:29:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686484204] [2022-07-22 21:29:58,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686484204] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:29:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147327932] [2022-07-22 21:29:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:29:58,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:29:58,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:29:58,099 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) [2022-07-22 21:29:58,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:29:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:29:58,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:29:58,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:29:58,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:29:58,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:29:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:29:58,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147327932] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:29:58,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:29:58,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-07-22 21:29:58,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942682939] [2022-07-22 21:29:58,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:29:58,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:29:58,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:29:58,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:29:58,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:29:58,293 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 532 out of 586 [2022-07-22 21:29:58,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 544 transitions, 1106 flow. Second operand has 6 states, 6 states have (on average 536.0) internal successors, (3216), 6 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:58,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:29:58,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 532 of 586 [2022-07-22 21:29:58,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:29:58,452 INFO L129 PetriNetUnfolder]: 40/812 cut-off events. [2022-07-22 21:29:58,452 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:29:58,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 812 events. 40/812 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2910 event pairs, 0 based on Foata normal form. 2/737 useless extension candidates. Maximal degree in co-relation 788. Up to 7 conditions per place. [2022-07-22 21:29:58,461 INFO L132 encePairwiseOnDemand]: 582/586 looper letters, 19 selfloop transitions, 5 changer transitions 0/556 dead transitions. [2022-07-22 21:29:58,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 556 transitions, 1180 flow [2022-07-22 21:29:58,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:29:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:29:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2686 transitions. [2022-07-22 21:29:58,467 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9167235494880546 [2022-07-22 21:29:58,467 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2686 transitions. [2022-07-22 21:29:58,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2686 transitions. [2022-07-22 21:29:58,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:29:58,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2686 transitions. [2022-07-22 21:29:58,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 537.2) internal successors, (2686), 5 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:58,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 586.0) internal successors, (3516), 6 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:58,478 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 586.0) internal successors, (3516), 6 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:58,478 INFO L186 Difference]: Start difference. First operand has 522 places, 544 transitions, 1106 flow. Second operand 5 states and 2686 transitions. [2022-07-22 21:29:58,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 556 transitions, 1180 flow [2022-07-22 21:29:58,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 556 transitions, 1178 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:29:58,486 INFO L242 Difference]: Finished difference. Result has 528 places, 546 transitions, 1134 flow [2022-07-22 21:29:58,488 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=586, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1134, PETRI_PLACES=528, PETRI_TRANSITIONS=546} [2022-07-22 21:29:58,488 INFO L279 CegarLoopForPetriNet]: 519 programPoint places, 9 predicate places. [2022-07-22 21:29:58,488 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 546 transitions, 1134 flow [2022-07-22 21:29:58,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 536.0) internal successors, (3216), 6 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:58,490 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:29:58,492 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:29:58,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 21:29:58,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:29:58,709 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)] === [2022-07-22 21:29:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:29:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash -215230342, now seen corresponding path program 2 times [2022-07-22 21:29:58,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:29:58,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331240010] [2022-07-22 21:29:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:29:58,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:29:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:29:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:29:58,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:29:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331240010] [2022-07-22 21:29:58,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331240010] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:29:58,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:29:58,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:29:58,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056417676] [2022-07-22 21:29:58,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:29:58,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:29:58,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:29:58,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:29:58,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:29:58,780 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 535 out of 586 [2022-07-22 21:29:58,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 546 transitions, 1134 flow. Second operand has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:58,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:29:58,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 535 of 586 [2022-07-22 21:29:58,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:29:58,930 INFO L129 PetriNetUnfolder]: 40/810 cut-off events. [2022-07-22 21:29:58,931 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-22 21:29:58,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 847 conditions, 810 events. 40/810 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2907 event pairs, 0 based on Foata normal form. 0/734 useless extension candidates. Maximal degree in co-relation 762. Up to 5 conditions per place. [2022-07-22 21:29:58,940 INFO L132 encePairwiseOnDemand]: 583/586 looper letters, 5 selfloop transitions, 2 changer transitions 0/544 dead transitions. [2022-07-22 21:29:58,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 544 transitions, 1144 flow [2022-07-22 21:29:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:29:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:29:58,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2148 transitions. [2022-07-22 21:29:58,944 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9163822525597269 [2022-07-22 21:29:58,944 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2148 transitions. [2022-07-22 21:29:58,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2148 transitions. [2022-07-22 21:29:58,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:29:58,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2148 transitions. [2022-07-22 21:29:58,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:58,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 586.0) internal successors, (2930), 5 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:58,953 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 586.0) internal successors, (2930), 5 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:58,953 INFO L186 Difference]: Start difference. First operand has 528 places, 546 transitions, 1134 flow. Second operand 4 states and 2148 transitions. [2022-07-22 21:29:58,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 544 transitions, 1144 flow [2022-07-22 21:29:58,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 544 transitions, 1138 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-22 21:29:58,961 INFO L242 Difference]: Finished difference. Result has 528 places, 544 transitions, 1128 flow [2022-07-22 21:29:58,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=586, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1128, PETRI_PLACES=528, PETRI_TRANSITIONS=544} [2022-07-22 21:29:58,963 INFO L279 CegarLoopForPetriNet]: 519 programPoint places, 9 predicate places. [2022-07-22 21:29:58,964 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 544 transitions, 1128 flow [2022-07-22 21:29:58,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 536.0) internal successors, (2144), 4 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:58,965 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:29:58,966 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 21:29:58,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:29:58,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2022-07-22 21:29:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:29:58,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1540121218, now seen corresponding path program 1 times [2022-07-22 21:29:58,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:29:58,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474094056] [2022-07-22 21:29:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:29:58,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:29:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:29:59,077 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:29:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:29:59,144 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:29:59,144 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:29:59,145 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 34 remaining) [2022-07-22 21:29:59,146 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (32 of 34 remaining) [2022-07-22 21:29:59,146 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (31 of 34 remaining) [2022-07-22 21:29:59,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (30 of 34 remaining) [2022-07-22 21:29:59,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (29 of 34 remaining) [2022-07-22 21:29:59,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (28 of 34 remaining) [2022-07-22 21:29:59,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (27 of 34 remaining) [2022-07-22 21:29:59,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION (26 of 34 remaining) [2022-07-22 21:29:59,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION (25 of 34 remaining) [2022-07-22 21:29:59,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION (24 of 34 remaining) [2022-07-22 21:29:59,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION (23 of 34 remaining) [2022-07-22 21:29:59,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION (22 of 34 remaining) [2022-07-22 21:29:59,149 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION (21 of 34 remaining) [2022-07-22 21:29:59,149 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION (20 of 34 remaining) [2022-07-22 21:29:59,149 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (19 of 34 remaining) [2022-07-22 21:29:59,149 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr1ASSERT_VIOLATIONERROR_FUNCTION (18 of 34 remaining) [2022-07-22 21:29:59,150 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr3ASSERT_VIOLATIONERROR_FUNCTION (17 of 34 remaining) [2022-07-22 21:29:59,150 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr2ASSERT_VIOLATIONERROR_FUNCTION (16 of 34 remaining) [2022-07-22 21:29:59,150 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr4ASSERT_VIOLATIONERROR_FUNCTION (15 of 34 remaining) [2022-07-22 21:29:59,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr5ASSERT_VIOLATIONERROR_FUNCTION (14 of 34 remaining) [2022-07-22 21:29:59,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr8ASSERT_VIOLATIONERROR_FUNCTION (13 of 34 remaining) [2022-07-22 21:29:59,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr6ASSERT_VIOLATIONERROR_FUNCTION (12 of 34 remaining) [2022-07-22 21:29:59,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr9ASSERT_VIOLATIONERROR_FUNCTION (11 of 34 remaining) [2022-07-22 21:29:59,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr7ASSERT_VIOLATIONERROR_FUNCTION (10 of 34 remaining) [2022-07-22 21:29:59,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (9 of 34 remaining) [2022-07-22 21:29:59,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr1ASSERT_VIOLATIONERROR_FUNCTION (8 of 34 remaining) [2022-07-22 21:29:59,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr3ASSERT_VIOLATIONERROR_FUNCTION (7 of 34 remaining) [2022-07-22 21:29:59,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr2ASSERT_VIOLATIONERROR_FUNCTION (6 of 34 remaining) [2022-07-22 21:29:59,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr4ASSERT_VIOLATIONERROR_FUNCTION (5 of 34 remaining) [2022-07-22 21:29:59,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr5ASSERT_VIOLATIONERROR_FUNCTION (4 of 34 remaining) [2022-07-22 21:29:59,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr8ASSERT_VIOLATIONERROR_FUNCTION (3 of 34 remaining) [2022-07-22 21:29:59,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr6ASSERT_VIOLATIONERROR_FUNCTION (2 of 34 remaining) [2022-07-22 21:29:59,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr9ASSERT_VIOLATIONERROR_FUNCTION (1 of 34 remaining) [2022-07-22 21:29:59,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr7ASSERT_VIOLATIONERROR_FUNCTION (0 of 34 remaining) [2022-07-22 21:29:59,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:29:59,156 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2022-07-22 21:29:59,157 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:29:59,157 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:29:59,214 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:29:59,222 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 722 places, 818 transitions, 1654 flow [2022-07-22 21:29:59,535 INFO L129 PetriNetUnfolder]: 179/1421 cut-off events. [2022-07-22 21:29:59,536 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:29:59,560 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1435 conditions, 1421 events. 179/1421 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 6684 event pairs, 0 based on Foata normal form. 0/1179 useless extension candidates. Maximal degree in co-relation 865. Up to 8 conditions per place. [2022-07-22 21:29:59,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 722 places, 818 transitions, 1654 flow [2022-07-22 21:29:59,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 722 places, 818 transitions, 1654 flow [2022-07-22 21:29:59,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:29:59,586 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@7cc514a6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6928dcb8 [2022-07-22 21:29:59,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2022-07-22 21:29:59,589 INFO L129 PetriNetUnfolder]: 3/58 cut-off events. [2022-07-22 21:29:59,589 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:29:59,589 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:29:59,589 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] [2022-07-22 21:29:59,591 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 41 more)] === [2022-07-22 21:29:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:29:59,592 INFO L85 PathProgramCache]: Analyzing trace with hash -997182855, now seen corresponding path program 1 times [2022-07-22 21:29:59,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:29:59,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079140071] [2022-07-22 21:29:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:29:59,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:29:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:29:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:29:59,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:29:59,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079140071] [2022-07-22 21:29:59,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079140071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:29:59,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:29:59,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:29:59,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202690578] [2022-07-22 21:29:59,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:29:59,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:29:59,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:29:59,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:29:59,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:29:59,630 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 744 out of 818 [2022-07-22 21:29:59,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 722 places, 818 transitions, 1654 flow. Second operand has 3 states, 3 states have (on average 745.0) internal successors, (2235), 3 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:59,632 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:29:59,632 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 744 of 818 [2022-07-22 21:29:59,632 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:29:59,949 INFO L129 PetriNetUnfolder]: 68/1316 cut-off events. [2022-07-22 21:29:59,949 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-22 21:29:59,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 1316 events. 68/1316 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 6420 event pairs, 0 based on Foata normal form. 147/1332 useless extension candidates. Maximal degree in co-relation 822. Up to 16 conditions per place. [2022-07-22 21:29:59,986 INFO L132 encePairwiseOnDemand]: 754/818 looper letters, 17 selfloop transitions, 2 changer transitions 0/763 dead transitions. [2022-07-22 21:29:59,986 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 763 transitions, 1582 flow [2022-07-22 21:29:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:29:59,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:29:59,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2314 transitions. [2022-07-22 21:29:59,990 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9429502852485737 [2022-07-22 21:29:59,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2314 transitions. [2022-07-22 21:29:59,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2314 transitions. [2022-07-22 21:29:59,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:29:59,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2314 transitions. [2022-07-22 21:29:59,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 771.3333333333334) internal successors, (2314), 3 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:59,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:00,000 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:00,000 INFO L186 Difference]: Start difference. First operand has 722 places, 818 transitions, 1654 flow. Second operand 3 states and 2314 transitions. [2022-07-22 21:30:00,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 763 transitions, 1582 flow [2022-07-22 21:30:00,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 724 places, 763 transitions, 1582 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:30:00,011 INFO L242 Difference]: Finished difference. Result has 725 places, 758 transitions, 1544 flow [2022-07-22 21:30:00,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1544, PETRI_PLACES=725, PETRI_TRANSITIONS=758} [2022-07-22 21:30:00,013 INFO L279 CegarLoopForPetriNet]: 722 programPoint places, 3 predicate places. [2022-07-22 21:30:00,013 INFO L495 AbstractCegarLoop]: Abstraction has has 725 places, 758 transitions, 1544 flow [2022-07-22 21:30:00,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 745.0) internal successors, (2235), 3 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:00,014 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:00,015 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:00,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:30:00,015 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 41 more)] === [2022-07-22 21:30:00,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:00,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1060665370, now seen corresponding path program 1 times [2022-07-22 21:30:00,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:00,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439438599] [2022-07-22 21:30:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:00,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:30:00,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:00,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439438599] [2022-07-22 21:30:00,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439438599] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:30:00,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88189168] [2022-07-22 21:30:00,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:00,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:30:00,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:30:00,068 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) [2022-07-22 21:30:00,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:30:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:00,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:30:00,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:30:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:30:00,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:30:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:30:00,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88189168] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:30:00,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:30:00,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-07-22 21:30:00,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069304590] [2022-07-22 21:30:00,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:30:00,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:30:00,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:00,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:30:00,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:30:00,216 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 744 out of 818 [2022-07-22 21:30:00,219 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 725 places, 758 transitions, 1544 flow. Second operand has 6 states, 6 states have (on average 748.0) internal successors, (4488), 6 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:00,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:00,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 744 of 818 [2022-07-22 21:30:00,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:00,503 INFO L129 PetriNetUnfolder]: 68/1325 cut-off events. [2022-07-22 21:30:00,503 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-07-22 21:30:00,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1376 conditions, 1325 events. 68/1325 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 6410 event pairs, 0 based on Foata normal form. 2/1197 useless extension candidates. Maximal degree in co-relation 1312. Up to 10 conditions per place. [2022-07-22 21:30:00,536 INFO L132 encePairwiseOnDemand]: 814/818 looper letters, 21 selfloop transitions, 5 changer transitions 0/770 dead transitions. [2022-07-22 21:30:00,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 770 transitions, 1622 flow [2022-07-22 21:30:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:30:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:30:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3748 transitions. [2022-07-22 21:30:00,541 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9163814180929095 [2022-07-22 21:30:00,542 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3748 transitions. [2022-07-22 21:30:00,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3748 transitions. [2022-07-22 21:30:00,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:00,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3748 transitions. [2022-07-22 21:30:00,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 749.6) internal successors, (3748), 5 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:00,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 818.0) internal successors, (4908), 6 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:00,564 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 818.0) internal successors, (4908), 6 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:00,565 INFO L186 Difference]: Start difference. First operand has 725 places, 758 transitions, 1544 flow. Second operand 5 states and 3748 transitions. [2022-07-22 21:30:00,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 770 transitions, 1622 flow [2022-07-22 21:30:00,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 728 places, 770 transitions, 1620 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:30:00,576 INFO L242 Difference]: Finished difference. Result has 731 places, 760 transitions, 1572 flow [2022-07-22 21:30:00,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1572, PETRI_PLACES=731, PETRI_TRANSITIONS=760} [2022-07-22 21:30:00,581 INFO L279 CegarLoopForPetriNet]: 722 programPoint places, 9 predicate places. [2022-07-22 21:30:00,581 INFO L495 AbstractCegarLoop]: Abstraction has has 731 places, 760 transitions, 1572 flow [2022-07-22 21:30:00,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 748.0) internal successors, (4488), 6 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:00,582 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:00,582 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:00,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:30:00,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-22 21:30:00,799 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 41 more)] === [2022-07-22 21:30:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1485775674, now seen corresponding path program 2 times [2022-07-22 21:30:00,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:00,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13802738] [2022-07-22 21:30:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:00,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:30:00,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:00,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13802738] [2022-07-22 21:30:00,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13802738] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:00,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:00,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:30:00,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833945078] [2022-07-22 21:30:00,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:00,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:30:00,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:00,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:30:00,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:30:00,840 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 747 out of 818 [2022-07-22 21:30:00,842 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 731 places, 760 transitions, 1572 flow. Second operand has 4 states, 4 states have (on average 748.0) internal successors, (2992), 4 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:00,842 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:00,842 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 747 of 818 [2022-07-22 21:30:00,842 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:01,082 INFO L129 PetriNetUnfolder]: 68/1323 cut-off events. [2022-07-22 21:30:01,082 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-07-22 21:30:01,105 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1372 conditions, 1323 events. 68/1323 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 6407 event pairs, 0 based on Foata normal form. 0/1194 useless extension candidates. Maximal degree in co-relation 1286. Up to 9 conditions per place. [2022-07-22 21:30:01,113 INFO L132 encePairwiseOnDemand]: 815/818 looper letters, 7 selfloop transitions, 2 changer transitions 0/758 dead transitions. [2022-07-22 21:30:01,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 758 transitions, 1586 flow [2022-07-22 21:30:01,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:30:01,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:30:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2998 transitions. [2022-07-22 21:30:01,118 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9162591687041565 [2022-07-22 21:30:01,118 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2998 transitions. [2022-07-22 21:30:01,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2998 transitions. [2022-07-22 21:30:01,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:01,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2998 transitions. [2022-07-22 21:30:01,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 749.5) internal successors, (2998), 4 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:01,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 818.0) internal successors, (4090), 5 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:01,127 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 818.0) internal successors, (4090), 5 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:01,127 INFO L186 Difference]: Start difference. First operand has 731 places, 760 transitions, 1572 flow. Second operand 4 states and 2998 transitions. [2022-07-22 21:30:01,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 758 transitions, 1586 flow [2022-07-22 21:30:01,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 731 places, 758 transitions, 1580 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-22 21:30:01,136 INFO L242 Difference]: Finished difference. Result has 731 places, 758 transitions, 1566 flow [2022-07-22 21:30:01,137 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=728, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1566, PETRI_PLACES=731, PETRI_TRANSITIONS=758} [2022-07-22 21:30:01,137 INFO L279 CegarLoopForPetriNet]: 722 programPoint places, 9 predicate places. [2022-07-22 21:30:01,137 INFO L495 AbstractCegarLoop]: Abstraction has has 731 places, 758 transitions, 1566 flow [2022-07-22 21:30:01,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 748.0) internal successors, (2992), 4 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:01,138 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:01,138 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:01,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:30:01,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 41 more)] === [2022-07-22 21:30:01,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:01,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1603753880, now seen corresponding path program 1 times [2022-07-22 21:30:01,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:01,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322236606] [2022-07-22 21:30:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:01,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:30:01,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:01,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322236606] [2022-07-22 21:30:01,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322236606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:01,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:01,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:30:01,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726430279] [2022-07-22 21:30:01,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:01,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:30:01,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:01,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:30:01,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:30:01,186 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 746 out of 818 [2022-07-22 21:30:01,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 731 places, 758 transitions, 1566 flow. Second operand has 3 states, 3 states have (on average 747.0) internal successors, (2241), 3 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:01,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:01,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 746 of 818 [2022-07-22 21:30:01,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:01,416 INFO L129 PetriNetUnfolder]: 55/1103 cut-off events. [2022-07-22 21:30:01,417 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-22 21:30:01,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1161 conditions, 1103 events. 55/1103 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4598 event pairs, 0 based on Foata normal form. 0/997 useless extension candidates. Maximal degree in co-relation 1076. Up to 16 conditions per place. [2022-07-22 21:30:01,446 INFO L132 encePairwiseOnDemand]: 815/818 looper letters, 13 selfloop transitions, 2 changer transitions 0/762 dead transitions. [2022-07-22 21:30:01,446 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 762 transitions, 1604 flow [2022-07-22 21:30:01,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:30:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:30:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2254 transitions. [2022-07-22 21:30:01,450 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9185004074979625 [2022-07-22 21:30:01,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2254 transitions. [2022-07-22 21:30:01,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2254 transitions. [2022-07-22 21:30:01,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:01,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2254 transitions. [2022-07-22 21:30:01,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 751.3333333333334) internal successors, (2254), 3 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:01,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:01,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:01,458 INFO L186 Difference]: Start difference. First operand has 731 places, 758 transitions, 1566 flow. Second operand 3 states and 2254 transitions. [2022-07-22 21:30:01,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 762 transitions, 1604 flow [2022-07-22 21:30:01,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 731 places, 762 transitions, 1601 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:30:01,467 INFO L242 Difference]: Finished difference. Result has 732 places, 759 transitions, 1575 flow [2022-07-22 21:30:01,468 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=1563, PETRI_DIFFERENCE_MINUEND_PLACES=729, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1575, PETRI_PLACES=732, PETRI_TRANSITIONS=759} [2022-07-22 21:30:01,469 INFO L279 CegarLoopForPetriNet]: 722 programPoint places, 10 predicate places. [2022-07-22 21:30:01,469 INFO L495 AbstractCegarLoop]: Abstraction has has 732 places, 759 transitions, 1575 flow [2022-07-22 21:30:01,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 747.0) internal successors, (2241), 3 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:01,469 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:01,470 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:01,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:30:01,470 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 41 more)] === [2022-07-22 21:30:01,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:01,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1914924077, now seen corresponding path program 1 times [2022-07-22 21:30:01,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:01,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30937149] [2022-07-22 21:30:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:01,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 21:30:02,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:02,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30937149] [2022-07-22 21:30:02,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30937149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:02,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:02,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-22 21:30:02,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869215232] [2022-07-22 21:30:02,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:02,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 21:30:02,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:02,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 21:30:02,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-22 21:30:02,049 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 566 out of 818 [2022-07-22 21:30:02,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 759 transitions, 1575 flow. Second operand has 17 states, 17 states have (on average 568.9411764705883) internal successors, (9672), 17 states have internal predecessors, (9672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:02,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:02,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 566 of 818 [2022-07-22 21:30:02,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand