./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:43:43,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:43:43,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:43:43,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:43:43,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:43:43,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:43:43,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:43:43,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:43:43,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:43:43,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:43:43,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:43:43,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:43:43,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:43:43,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:43:43,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:43:43,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:43:43,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:43:43,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:43:43,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:43:43,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:43:43,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:43:43,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:43:43,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:43:43,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:43:43,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:43:43,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:43:43,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:43:43,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:43:43,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:43:43,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:43:43,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:43:43,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:43:43,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:43:43,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:43:43,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:43:43,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:43:43,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:43:43,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:43:43,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:43:43,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:43:43,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:43:43,802 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:43:43,830 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:43:43,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:43:43,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:43:43,832 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:43:43,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:43:43,833 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:43:43,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:43:43,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:43:43,834 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:43:43,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:43:43,835 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:43:43,835 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:43:43,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:43:43,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:43:43,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:43:43,836 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:43:43,836 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:43:43,836 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:43:43,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:43:43,836 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:43:43,837 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:43:43,837 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:43:43,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:43:43,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:43:43,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:43:43,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:43:43,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:43:43,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:43:43,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:43:43,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:43:43,839 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:43:43,839 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:43:43,839 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:43:43,839 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:43:43,839 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:43:44,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:43:44,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:43:44,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:43:44,215 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:43:44,215 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:43:44,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-09-01 03:43:45,347 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:43:45,585 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:43:45,585 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-09-01 03:43:45,595 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2627020d/41b4693fc9464b3286f436b1bbdb6e7f/FLAG33444174e [2023-09-01 03:43:45,614 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2627020d/41b4693fc9464b3286f436b1bbdb6e7f [2023-09-01 03:43:45,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:43:45,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:43:45,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:43:45,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:43:45,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:43:45,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:43:45" (1/1) ... [2023-09-01 03:43:45,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7117aeff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:45, skipping insertion in model container [2023-09-01 03:43:45,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:43:45" (1/1) ... [2023-09-01 03:43:45,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:43:45,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:43:45,836 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-09-01 03:43:45,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:43:45,861 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-09-01 03:43:45,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2534dbdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:45, skipping insertion in model container [2023-09-01 03:43:45,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:43:45,864 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:43:45,866 INFO L158 Benchmark]: Toolchain (without parser) took 247.55ms. Allocated memory is still 75.5MB. Free memory was 52.9MB in the beginning and 43.1MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 03:43:45,867 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 58.7MB. Free memory is still 36.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:43:45,868 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.75ms. Allocated memory is still 75.5MB. Free memory was 52.7MB in the beginning and 43.1MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-09-01 03:43:45,869 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 58.7MB. Free memory is still 36.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 243.75ms. Allocated memory is still 75.5MB. Free memory was 52.7MB in the beginning and 43.1MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 125]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:43:47,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:43:47,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:43:47,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:43:47,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:43:47,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:43:47,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:43:47,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:43:47,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:43:47,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:43:47,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:43:47,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:43:47,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:43:47,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:43:47,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:43:47,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:43:47,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:43:47,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:43:47,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:43:47,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:43:47,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:43:47,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:43:47,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:43:47,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:43:47,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:43:47,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:43:47,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:43:47,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:43:47,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:43:47,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:43:47,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:43:47,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:43:47,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:43:47,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:43:47,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:43:47,765 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:43:47,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:43:47,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:43:47,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:43:47,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:43:47,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:43:47,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:43:47,799 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:43:47,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:43:47,800 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:43:47,800 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:43:47,801 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:43:47,801 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:43:47,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:43:47,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:43:47,802 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:43:47,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:43:47,803 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:43:47,804 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:43:47,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:43:47,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:43:47,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:43:47,804 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:43:47,805 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:43:47,805 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:43:47,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:43:47,805 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:43:47,805 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:43:47,806 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:43:47,806 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:43:47,806 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:43:47,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:43:47,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:43:47,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:43:47,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:43:47,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:43:47,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:43:47,807 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:43:47,808 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:43:47,808 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:43:47,808 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:43:47,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:43:47,809 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:43:47,809 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:43:47,809 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:43:48,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:43:48,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:43:48,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:43:48,151 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:43:48,151 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:43:48,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-09-01 03:43:49,393 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:43:49,639 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:43:49,639 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-09-01 03:43:49,652 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3027ee4ca/fcd5a82fcba447b7ab0467b2152db82e/FLAGe40f65435 [2023-09-01 03:43:49,671 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3027ee4ca/fcd5a82fcba447b7ab0467b2152db82e [2023-09-01 03:43:49,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:43:49,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:43:49,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:43:49,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:43:49,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:43:49,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:43:49" (1/1) ... [2023-09-01 03:43:49,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cb4ba90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:49, skipping insertion in model container [2023-09-01 03:43:49,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:43:49" (1/1) ... [2023-09-01 03:43:49,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:43:49,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:43:49,900 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-09-01 03:43:49,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:43:49,931 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:43:49,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:43:49,968 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-09-01 03:43:49,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:43:49,982 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:43:50,015 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c[3056,3069] [2023-09-01 03:43:50,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:43:50,028 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:43:50,029 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:43:50,035 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:43:50,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:50 WrapperNode [2023-09-01 03:43:50,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:43:50,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:43:50,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:43:50,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:43:50,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:50" (1/1) ... [2023-09-01 03:43:50,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:50" (1/1) ... [2023-09-01 03:43:50,100 INFO L138 Inliner]: procedures = 27, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 166 [2023-09-01 03:43:50,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:43:50,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:43:50,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:43:50,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:43:50,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:50" (1/1) ... [2023-09-01 03:43:50,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:50" (1/1) ... [2023-09-01 03:43:50,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:50" (1/1) ... [2023-09-01 03:43:50,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:50" (1/1) ... [2023-09-01 03:43:50,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:50" (1/1) ... [2023-09-01 03:43:50,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:50" (1/1) ... [2023-09-01 03:43:50,152 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:50" (1/1) ... [2023-09-01 03:43:50,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:50" (1/1) ... [2023-09-01 03:43:50,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:43:50,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:43:50,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:43:50,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:43:50,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:50" (1/1) ... [2023-09-01 03:43:50,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:43:50,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:43:50,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 03:43:50,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:43:50,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:43:50,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:43:50,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:43:50,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:43:50,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:43:50,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:43:50,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:43:50,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:43:50,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:43:50,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:43:50,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:43:50,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:43:50,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:43:50,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:43:50,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:43:50,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:43:50,248 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:43:50,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 03:43:50,363 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:43:50,365 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:43:50,757 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:43:50,891 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:43:50,895 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 03:43:50,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:43:50 BoogieIcfgContainer [2023-09-01 03:43:50,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:43:50,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:43:50,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:43:50,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:43:50,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:43:49" (1/3) ... [2023-09-01 03:43:50,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8aa304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:43:50, skipping insertion in model container [2023-09-01 03:43:50,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:43:50" (2/3) ... [2023-09-01 03:43:50,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8aa304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:43:50, skipping insertion in model container [2023-09-01 03:43:50,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:43:50" (3/3) ... [2023-09-01 03:43:50,907 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-09-01 03:43:50,921 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:43:50,922 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-09-01 03:43:50,922 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:43:51,002 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 03:43:51,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 166 transitions, 356 flow [2023-09-01 03:43:51,122 INFO L130 PetriNetUnfolder]: 11/163 cut-off events. [2023-09-01 03:43:51,123 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:43:51,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 163 events. 11/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 125. Up to 3 conditions per place. [2023-09-01 03:43:51,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 166 transitions, 356 flow [2023-09-01 03:43:51,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 159 transitions, 336 flow [2023-09-01 03:43:51,142 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:43:51,157 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 159 transitions, 336 flow [2023-09-01 03:43:51,160 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 159 transitions, 336 flow [2023-09-01 03:43:51,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 159 transitions, 336 flow [2023-09-01 03:43:51,206 INFO L130 PetriNetUnfolder]: 11/159 cut-off events. [2023-09-01 03:43:51,208 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:43:51,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 159 events. 11/159 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 125. Up to 3 conditions per place. [2023-09-01 03:43:51,212 INFO L119 LiptonReduction]: Number of co-enabled transitions 1674 [2023-09-01 03:44:08,363 INFO L134 LiptonReduction]: Checked pairs total: 3569 [2023-09-01 03:44:08,363 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-09-01 03:44:08,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:44:08,384 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@68eeeb6d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:44:08,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-09-01 03:44:08,387 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:44:08,387 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:44:08,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:08,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:44:08,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:08,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:08,398 INFO L85 PathProgramCache]: Analyzing trace with hash 21830, now seen corresponding path program 1 times [2023-09-01 03:44:08,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:08,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812134440] [2023-09-01 03:44:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:44:08,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:08,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:08,415 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:08,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 03:44:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:44:08,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:44:08,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:08,647 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:44:08,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:44:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:08,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:44:08,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:08,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812134440] [2023-09-01 03:44:08,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812134440] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:44:08,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:44:08,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:44:08,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008292643] [2023-09-01 03:44:08,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:44:08,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:44:08,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:08,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:44:08,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:44:08,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 333 [2023-09-01 03:44:08,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:08,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:08,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 333 [2023-09-01 03:44:08,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:09,270 INFO L130 PetriNetUnfolder]: 1210/1759 cut-off events. [2023-09-01 03:44:09,271 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-09-01 03:44:09,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3563 conditions, 1759 events. 1210/1759 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 8185 event pairs, 878 based on Foata normal form. 0/805 useless extension candidates. Maximal degree in co-relation 3275. Up to 1698 conditions per place. [2023-09-01 03:44:09,287 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-09-01 03:44:09,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 180 flow [2023-09-01 03:44:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:44:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:44:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-09-01 03:44:09,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45845845845845845 [2023-09-01 03:44:09,309 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-09-01 03:44:09,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-09-01 03:44:09,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:09,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-09-01 03:44:09,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:09,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:09,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:09,330 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 106 flow. Second operand 3 states and 458 transitions. [2023-09-01 03:44:09,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 180 flow [2023-09-01 03:44:09,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 03:44:09,339 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 92 flow [2023-09-01 03:44:09,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-09-01 03:44:09,349 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-09-01 03:44:09,350 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 92 flow [2023-09-01 03:44:09,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:09,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:09,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:44:09,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 03:44:09,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:09,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:09,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:09,568 INFO L85 PathProgramCache]: Analyzing trace with hash 21879, now seen corresponding path program 1 times [2023-09-01 03:44:09,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:09,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721020814] [2023-09-01 03:44:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:44:09,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:09,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:09,570 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:09,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 03:44:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:44:09,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:44:09,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:09,747 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2023-09-01 03:44:09,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2023-09-01 03:44:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:09,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:44:09,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:09,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721020814] [2023-09-01 03:44:09,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721020814] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:44:09,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:44:09,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:44:09,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178408137] [2023-09-01 03:44:09,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:44:09,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:44:09,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:09,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:44:09,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:44:09,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 333 [2023-09-01 03:44:09,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:09,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:09,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 333 [2023-09-01 03:44:09,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:10,248 INFO L130 PetriNetUnfolder]: 1006/1482 cut-off events. [2023-09-01 03:44:10,248 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 03:44:10,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2950 conditions, 1482 events. 1006/1482 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 6794 event pairs, 722 based on Foata normal form. 0/709 useless extension candidates. Maximal degree in co-relation 2944. Up to 1421 conditions per place. [2023-09-01 03:44:10,256 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-09-01 03:44:10,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 162 flow [2023-09-01 03:44:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:44:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:44:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-09-01 03:44:10,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45645645645645644 [2023-09-01 03:44:10,259 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-09-01 03:44:10,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-09-01 03:44:10,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:10,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-09-01 03:44:10,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:10,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:10,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:10,264 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 92 flow. Second operand 3 states and 456 transitions. [2023-09-01 03:44:10,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 162 flow [2023-09-01 03:44:10,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:44:10,265 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 89 flow [2023-09-01 03:44:10,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-09-01 03:44:10,266 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -7 predicate places. [2023-09-01 03:44:10,266 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 89 flow [2023-09-01 03:44:10,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:10,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:10,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:44:10,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 03:44:10,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:10,477 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:10,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:10,477 INFO L85 PathProgramCache]: Analyzing trace with hash 21880, now seen corresponding path program 1 times [2023-09-01 03:44:10,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:10,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891205649] [2023-09-01 03:44:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:44:10,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:10,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:10,482 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:10,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 03:44:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:44:10,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:44:10,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:10,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:44:10,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:44:10,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:44:10,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:44:10,673 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 03:44:10,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 03:44:10,719 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 03:44:10,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-09-01 03:44:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:10,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:44:10,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:10,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891205649] [2023-09-01 03:44:10,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891205649] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:44:10,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:44:10,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:44:10,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090090205] [2023-09-01 03:44:10,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:44:10,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:44:10,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:10,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:44:10,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:44:10,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-09-01 03:44:10,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:10,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:10,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-09-01 03:44:10,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:11,238 INFO L130 PetriNetUnfolder]: 802/1205 cut-off events. [2023-09-01 03:44:11,238 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 03:44:11,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2397 conditions, 1205 events. 802/1205 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5459 event pairs, 566 based on Foata normal form. 0/613 useless extension candidates. Maximal degree in co-relation 2390. Up to 1144 conditions per place. [2023-09-01 03:44:11,244 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 34 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-09-01 03:44:11,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 155 flow [2023-09-01 03:44:11,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:44:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:44:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-09-01 03:44:11,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574574574574575 [2023-09-01 03:44:11,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-09-01 03:44:11,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-09-01 03:44:11,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:11,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-09-01 03:44:11,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:11,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:11,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:11,251 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 89 flow. Second operand 3 states and 457 transitions. [2023-09-01 03:44:11,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 155 flow [2023-09-01 03:44:11,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:44:11,252 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 86 flow [2023-09-01 03:44:11,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-09-01 03:44:11,253 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -8 predicate places. [2023-09-01 03:44:11,253 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 86 flow [2023-09-01 03:44:11,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:11,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:11,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:44:11,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 03:44:11,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:11,463 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:11,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:11,463 INFO L85 PathProgramCache]: Analyzing trace with hash 21831, now seen corresponding path program 1 times [2023-09-01 03:44:11,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:11,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945031802] [2023-09-01 03:44:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:44:11,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:11,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:11,465 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:11,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 03:44:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:44:11,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:44:11,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:11,622 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:44:11,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:44:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:11,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:44:11,650 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:11,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945031802] [2023-09-01 03:44:11,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945031802] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:44:11,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:44:11,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:44:11,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365290967] [2023-09-01 03:44:11,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:44:11,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:44:11,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:11,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:44:11,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:44:11,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 333 [2023-09-01 03:44:11,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:11,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:11,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 333 [2023-09-01 03:44:11,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:12,190 INFO L130 PetriNetUnfolder]: 1603/2408 cut-off events. [2023-09-01 03:44:12,190 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 03:44:12,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4786 conditions, 2408 events. 1603/2408 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 12635 event pairs, 1132 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 4778. Up to 1145 conditions per place. [2023-09-01 03:44:12,202 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 66 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-09-01 03:44:12,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 71 transitions, 294 flow [2023-09-01 03:44:12,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:44:12,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:44:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-09-01 03:44:12,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2023-09-01 03:44:12,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-09-01 03:44:12,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-09-01 03:44:12,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:12,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-09-01 03:44:12,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:12,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:12,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:12,209 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 86 flow. Second operand 3 states and 486 transitions. [2023-09-01 03:44:12,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 71 transitions, 294 flow [2023-09-01 03:44:12,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 71 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:44:12,211 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 97 flow [2023-09-01 03:44:12,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-09-01 03:44:12,212 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-09-01 03:44:12,212 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 97 flow [2023-09-01 03:44:12,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:12,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:12,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:44:12,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 03:44:12,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:12,422 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:12,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:12,422 INFO L85 PathProgramCache]: Analyzing trace with hash 678535, now seen corresponding path program 1 times [2023-09-01 03:44:12,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:12,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239054607] [2023-09-01 03:44:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:44:12,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:12,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:12,424 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:12,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 03:44:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:44:12,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:44:12,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:12,585 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:44:12,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:44:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:12,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:44:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:12,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:12,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239054607] [2023-09-01 03:44:12,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239054607] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:44:12,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:44:12,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:44:12,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560606826] [2023-09-01 03:44:12,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:44:12,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:44:12,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:12,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:44:12,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:44:13,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 333 [2023-09-01 03:44:13,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 97 flow. Second operand has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:13,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:13,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 333 [2023-09-01 03:44:13,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:14,086 INFO L130 PetriNetUnfolder]: 2406/3615 cut-off events. [2023-09-01 03:44:14,086 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 03:44:14,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7191 conditions, 3615 events. 2406/3615 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 20328 event pairs, 1698 based on Foata normal form. 0/1850 useless extension candidates. Maximal degree in co-relation 7181. Up to 1144 conditions per place. [2023-09-01 03:44:14,106 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 98 selfloop transitions, 7 changer transitions 0/108 dead transitions. [2023-09-01 03:44:14,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 108 transitions, 463 flow [2023-09-01 03:44:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:44:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:44:14,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 912 transitions. [2023-09-01 03:44:14,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45645645645645644 [2023-09-01 03:44:14,109 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 912 transitions. [2023-09-01 03:44:14,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 912 transitions. [2023-09-01 03:44:14,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:14,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 912 transitions. [2023-09-01 03:44:14,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 152.0) internal successors, (912), 6 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:14,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:14,116 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 333.0) internal successors, (2331), 7 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:14,116 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 97 flow. Second operand 6 states and 912 transitions. [2023-09-01 03:44:14,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 108 transitions, 463 flow [2023-09-01 03:44:14,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 108 transitions, 461 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:44:14,118 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 149 flow [2023-09-01 03:44:14,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-09-01 03:44:14,119 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-09-01 03:44:14,120 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 149 flow [2023-09-01 03:44:14,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:14,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:14,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:44:14,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 03:44:14,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:14,330 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:14,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:14,331 INFO L85 PathProgramCache]: Analyzing trace with hash 21043134, now seen corresponding path program 1 times [2023-09-01 03:44:14,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:14,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194961437] [2023-09-01 03:44:14,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:44:14,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:14,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:14,333 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:14,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 03:44:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:44:14,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:44:14,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:14,454 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2023-09-01 03:44:14,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2023-09-01 03:44:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:14,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:44:14,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:14,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194961437] [2023-09-01 03:44:14,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194961437] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:44:14,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:44:14,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:44:14,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514567106] [2023-09-01 03:44:14,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:44:14,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:44:14,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:14,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:44:14,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:44:14,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-09-01 03:44:14,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:14,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:14,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-09-01 03:44:14,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:14,991 INFO L130 PetriNetUnfolder]: 2334/3489 cut-off events. [2023-09-01 03:44:14,991 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-09-01 03:44:14,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6964 conditions, 3489 events. 2334/3489 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 19458 event pairs, 1638 based on Foata normal form. 0/1809 useless extension candidates. Maximal degree in co-relation 6949. Up to 3306 conditions per place. [2023-09-01 03:44:15,017 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-09-01 03:44:15,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 223 flow [2023-09-01 03:44:15,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:44:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:44:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-09-01 03:44:15,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44344344344344344 [2023-09-01 03:44:15,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-09-01 03:44:15,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-09-01 03:44:15,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:15,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-09-01 03:44:15,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:15,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:15,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:15,024 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 149 flow. Second operand 3 states and 443 transitions. [2023-09-01 03:44:15,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 223 flow [2023-09-01 03:44:15,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 42 transitions, 213 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 03:44:15,027 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 137 flow [2023-09-01 03:44:15,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-09-01 03:44:15,030 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-09-01 03:44:15,030 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 137 flow [2023-09-01 03:44:15,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:15,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:15,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 03:44:15,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 03:44:15,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:15,240 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:15,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash 21043135, now seen corresponding path program 1 times [2023-09-01 03:44:15,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:15,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549543320] [2023-09-01 03:44:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:44:15,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:15,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:15,244 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:15,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 03:44:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:44:15,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:44:15,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:15,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:44:15,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:44:15,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:44:15,413 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 03:44:15,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 03:44:15,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-09-01 03:44:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:15,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:44:15,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:15,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549543320] [2023-09-01 03:44:15,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549543320] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:44:15,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:44:15,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:44:15,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676337570] [2023-09-01 03:44:15,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:44:15,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:44:15,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:15,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:44:15,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:44:15,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-09-01 03:44:15,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:15,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:15,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-09-01 03:44:15,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:15,979 INFO L130 PetriNetUnfolder]: 2262/3363 cut-off events. [2023-09-01 03:44:15,980 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-09-01 03:44:15,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6709 conditions, 3363 events. 2262/3363 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 18583 event pairs, 1578 based on Foata normal form. 0/1773 useless extension candidates. Maximal degree in co-relation 6693. Up to 3180 conditions per place. [2023-09-01 03:44:15,995 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-09-01 03:44:15,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 207 flow [2023-09-01 03:44:15,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:44:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:44:15,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-09-01 03:44:15,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45345345345345345 [2023-09-01 03:44:15,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-09-01 03:44:15,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-09-01 03:44:15,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:15,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-09-01 03:44:16,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:16,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:16,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:16,002 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 137 flow. Second operand 3 states and 453 transitions. [2023-09-01 03:44:16,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 207 flow [2023-09-01 03:44:16,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 40 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:44:16,003 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 134 flow [2023-09-01 03:44:16,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-09-01 03:44:16,004 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-09-01 03:44:16,004 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 134 flow [2023-09-01 03:44:16,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:16,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:16,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:44:16,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 03:44:16,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:16,214 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:16,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:16,214 INFO L85 PathProgramCache]: Analyzing trace with hash 652332668, now seen corresponding path program 1 times [2023-09-01 03:44:16,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:16,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733392235] [2023-09-01 03:44:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:44:16,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:16,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:16,216 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:16,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 03:44:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:44:16,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:44:16,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:16,330 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:44:16,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:44:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:16,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:44:16,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:16,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733392235] [2023-09-01 03:44:16,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733392235] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:44:16,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:44:16,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:44:16,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451690103] [2023-09-01 03:44:16,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:44:16,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:44:16,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:16,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:44:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:44:16,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 333 [2023-09-01 03:44:16,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:16,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:16,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 333 [2023-09-01 03:44:16,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:16,774 INFO L130 PetriNetUnfolder]: 1524/2328 cut-off events. [2023-09-01 03:44:16,774 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-09-01 03:44:16,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4634 conditions, 2328 events. 1524/2328 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 12335 event pairs, 1074 based on Foata normal form. 0/1401 useless extension candidates. Maximal degree in co-relation 4617. Up to 2168 conditions per place. [2023-09-01 03:44:16,784 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 31 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2023-09-01 03:44:16,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 38 transitions, 200 flow [2023-09-01 03:44:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:44:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:44:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2023-09-01 03:44:16,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346846846846847 [2023-09-01 03:44:16,787 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 579 transitions. [2023-09-01 03:44:16,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 579 transitions. [2023-09-01 03:44:16,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:16,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 579 transitions. [2023-09-01 03:44:16,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:16,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:16,793 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:16,794 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 134 flow. Second operand 4 states and 579 transitions. [2023-09-01 03:44:16,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 38 transitions, 200 flow [2023-09-01 03:44:16,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:44:16,796 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 137 flow [2023-09-01 03:44:16,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-09-01 03:44:16,799 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-09-01 03:44:16,799 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 137 flow [2023-09-01 03:44:16,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:16,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:16,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:44:16,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 03:44:17,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:17,009 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:17,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:17,009 INFO L85 PathProgramCache]: Analyzing trace with hash 652332669, now seen corresponding path program 1 times [2023-09-01 03:44:17,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:17,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936448338] [2023-09-01 03:44:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:44:17,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:17,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:17,011 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:17,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 03:44:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:44:17,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:44:17,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:17,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:44:17,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:17,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936448338] [2023-09-01 03:44:17,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936448338] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:44:17,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:44:17,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:44:17,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125665177] [2023-09-01 03:44:17,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:44:17,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:44:17,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:17,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:44:17,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:44:17,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-09-01 03:44:17,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:17,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:17,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-09-01 03:44:17,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:17,471 INFO L130 PetriNetUnfolder]: 1136/1776 cut-off events. [2023-09-01 03:44:17,471 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-09-01 03:44:17,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3568 conditions, 1776 events. 1136/1776 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 9229 event pairs, 835 based on Foata normal form. 26/1137 useless extension candidates. Maximal degree in co-relation 3550. Up to 1453 conditions per place. [2023-09-01 03:44:17,479 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 54 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-09-01 03:44:17,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 307 flow [2023-09-01 03:44:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:44:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:44:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-09-01 03:44:17,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624624624624625 [2023-09-01 03:44:17,481 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-09-01 03:44:17,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-09-01 03:44:17,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:17,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-09-01 03:44:17,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:17,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:17,485 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:17,486 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 137 flow. Second operand 4 states and 616 transitions. [2023-09-01 03:44:17,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 307 flow [2023-09-01 03:44:17,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:44:17,489 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 159 flow [2023-09-01 03:44:17,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-09-01 03:44:17,491 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-09-01 03:44:17,491 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 159 flow [2023-09-01 03:44:17,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:17,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:17,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:44:17,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-09-01 03:44:17,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:17,700 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:17,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:17,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1258634947, now seen corresponding path program 1 times [2023-09-01 03:44:17,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:17,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398841822] [2023-09-01 03:44:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:44:17,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:17,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:17,702 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:17,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 03:44:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:44:17,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:44:17,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:17,861 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:44:17,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:44:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:17,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:44:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:18,558 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:18,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398841822] [2023-09-01 03:44:18,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398841822] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:44:18,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:44:18,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:44:18,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450240143] [2023-09-01 03:44:18,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:44:18,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:44:18,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:18,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:44:18,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:44:20,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 333 [2023-09-01 03:44:20,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 159 flow. Second operand has 8 states, 8 states have (on average 131.25) internal successors, (1050), 8 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:20,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:20,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 333 [2023-09-01 03:44:20,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:24,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:44:26,075 INFO L130 PetriNetUnfolder]: 1246/1986 cut-off events. [2023-09-01 03:44:26,075 INFO L131 PetriNetUnfolder]: For 351/351 co-relation queries the response was YES. [2023-09-01 03:44:26,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4329 conditions, 1986 events. 1246/1986 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10299 event pairs, 921 based on Foata normal form. 134/1684 useless extension candidates. Maximal degree in co-relation 4309. Up to 722 conditions per place. [2023-09-01 03:44:26,083 INFO L137 encePairwiseOnDemand]: 327/333 looper letters, 93 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2023-09-01 03:44:26,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 107 transitions, 536 flow [2023-09-01 03:44:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 03:44:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 03:44:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1408 transitions. [2023-09-01 03:44:26,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228228228228228 [2023-09-01 03:44:26,089 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1408 transitions. [2023-09-01 03:44:26,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1408 transitions. [2023-09-01 03:44:26,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:26,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1408 transitions. [2023-09-01 03:44:26,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 140.8) internal successors, (1408), 10 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:26,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:26,099 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 333.0) internal successors, (3663), 11 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:26,099 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 159 flow. Second operand 10 states and 1408 transitions. [2023-09-01 03:44:26,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 107 transitions, 536 flow [2023-09-01 03:44:26,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 107 transitions, 526 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 03:44:26,102 INFO L231 Difference]: Finished difference. Result has 63 places, 40 transitions, 191 flow [2023-09-01 03:44:26,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=191, PETRI_PLACES=63, PETRI_TRANSITIONS=40} [2023-09-01 03:44:26,102 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2023-09-01 03:44:26,102 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 40 transitions, 191 flow [2023-09-01 03:44:26,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.25) internal successors, (1050), 8 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:26,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:26,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:44:26,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 03:44:26,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:26,312 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:26,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:26,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1252367159, now seen corresponding path program 1 times [2023-09-01 03:44:26,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:26,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462706506] [2023-09-01 03:44:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:44:26,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:26,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:26,314 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:26,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 03:44:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:44:26,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:44:26,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:26,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:44:26,471 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-09-01 03:44:26,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-09-01 03:44:26,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2023-09-01 03:44:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:26,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:44:26,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:26,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462706506] [2023-09-01 03:44:26,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462706506] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:44:26,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:44:26,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:44:26,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257104419] [2023-09-01 03:44:26,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:44:26,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:44:26,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:26,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:44:26,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:44:26,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-09-01 03:44:26,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 40 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:26,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:26,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-09-01 03:44:26,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:26,929 INFO L130 PetriNetUnfolder]: 1098/1751 cut-off events. [2023-09-01 03:44:26,929 INFO L131 PetriNetUnfolder]: For 661/661 co-relation queries the response was YES. [2023-09-01 03:44:26,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4076 conditions, 1751 events. 1098/1751 cut-off events. For 661/661 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9031 event pairs, 817 based on Foata normal form. 0/1458 useless extension candidates. Maximal degree in co-relation 4054. Up to 1643 conditions per place. [2023-09-01 03:44:26,939 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 34 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-09-01 03:44:26,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 38 transitions, 257 flow [2023-09-01 03:44:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:44:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:44:26,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-09-01 03:44:26,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494494494494494 [2023-09-01 03:44:26,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-09-01 03:44:26,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-09-01 03:44:26,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:26,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-09-01 03:44:26,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:26,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:26,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:26,948 INFO L175 Difference]: Start difference. First operand has 63 places, 40 transitions, 191 flow. Second operand 3 states and 449 transitions. [2023-09-01 03:44:26,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 38 transitions, 257 flow [2023-09-01 03:44:26,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 38 transitions, 207 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-09-01 03:44:26,953 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 139 flow [2023-09-01 03:44:26,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-09-01 03:44:26,954 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-09-01 03:44:26,954 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 139 flow [2023-09-01 03:44:26,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:26,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:26,955 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:44:26,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 03:44:27,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:27,169 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:27,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:27,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1258838713, now seen corresponding path program 2 times [2023-09-01 03:44:27,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:27,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282750143] [2023-09-01 03:44:27,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:44:27,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:27,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:27,171 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:27,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 03:44:27,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:44:27,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:44:27,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:44:27,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:27,386 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:44:27,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:44:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:27,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:44:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:28,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:28,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282750143] [2023-09-01 03:44:28,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282750143] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:44:28,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:44:28,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:44:28,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45464912] [2023-09-01 03:44:28,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:44:28,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:44:28,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:28,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:44:28,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:44:31,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-09-01 03:44:31,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 139 flow. Second operand has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:31,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:31,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-09-01 03:44:31,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:34,886 INFO L130 PetriNetUnfolder]: 3600/5590 cut-off events. [2023-09-01 03:44:34,886 INFO L131 PetriNetUnfolder]: For 3767/3767 co-relation queries the response was YES. [2023-09-01 03:44:34,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13810 conditions, 5590 events. 3600/5590 cut-off events. For 3767/3767 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 32688 event pairs, 2599 based on Foata normal form. 6/4730 useless extension candidates. Maximal degree in co-relation 13792. Up to 1315 conditions per place. [2023-09-01 03:44:34,913 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 232 selfloop transitions, 12 changer transitions 0/247 dead transitions. [2023-09-01 03:44:34,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 247 transitions, 1239 flow [2023-09-01 03:44:34,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:44:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:44:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1870 transitions. [2023-09-01 03:44:34,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46796796796796797 [2023-09-01 03:44:34,920 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1870 transitions. [2023-09-01 03:44:34,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1870 transitions. [2023-09-01 03:44:34,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:34,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1870 transitions. [2023-09-01 03:44:34,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 155.83333333333334) internal successors, (1870), 12 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:34,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:34,932 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 333.0) internal successors, (4329), 13 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:34,932 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 139 flow. Second operand 12 states and 1870 transitions. [2023-09-01 03:44:34,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 247 transitions, 1239 flow [2023-09-01 03:44:34,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 247 transitions, 1238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:44:34,940 INFO L231 Difference]: Finished difference. Result has 71 places, 45 transitions, 236 flow [2023-09-01 03:44:34,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=236, PETRI_PLACES=71, PETRI_TRANSITIONS=45} [2023-09-01 03:44:34,940 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2023-09-01 03:44:34,941 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 45 transitions, 236 flow [2023-09-01 03:44:34,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:34,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:34,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:44:34,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-09-01 03:44:35,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:35,151 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:35,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:35,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1252367158, now seen corresponding path program 1 times [2023-09-01 03:44:35,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:35,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514980975] [2023-09-01 03:44:35,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:44:35,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:35,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:35,155 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:35,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 03:44:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:44:35,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:44:35,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:35,282 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 03:44:35,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 03:44:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:35,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:44:35,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:35,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514980975] [2023-09-01 03:44:35,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514980975] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:44:35,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:44:35,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:44:35,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197656882] [2023-09-01 03:44:35,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:44:35,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:44:35,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:35,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:44:35,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:44:35,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-09-01 03:44:35,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 45 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:35,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:35,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-09-01 03:44:35,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:35,854 INFO L130 PetriNetUnfolder]: 3236/5083 cut-off events. [2023-09-01 03:44:35,854 INFO L131 PetriNetUnfolder]: For 2799/2799 co-relation queries the response was YES. [2023-09-01 03:44:35,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12313 conditions, 5083 events. 3236/5083 cut-off events. For 2799/2799 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 29775 event pairs, 2265 based on Foata normal form. 0/4516 useless extension candidates. Maximal degree in co-relation 12287. Up to 4569 conditions per place. [2023-09-01 03:44:35,877 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-09-01 03:44:35,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 43 transitions, 312 flow [2023-09-01 03:44:35,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:44:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:44:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-09-01 03:44:35,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43543543543543545 [2023-09-01 03:44:35,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-09-01 03:44:35,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-09-01 03:44:35,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:35,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-09-01 03:44:35,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:35,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:35,883 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:35,883 INFO L175 Difference]: Start difference. First operand has 71 places, 45 transitions, 236 flow. Second operand 3 states and 435 transitions. [2023-09-01 03:44:35,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 43 transitions, 312 flow [2023-09-01 03:44:35,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 43 transitions, 290 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-09-01 03:44:35,889 INFO L231 Difference]: Finished difference. Result has 67 places, 43 transitions, 212 flow [2023-09-01 03:44:35,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=67, PETRI_TRANSITIONS=43} [2023-09-01 03:44:35,890 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2023-09-01 03:44:35,890 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 43 transitions, 212 flow [2023-09-01 03:44:35,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:35,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:35,891 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-09-01 03:44:35,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 03:44:36,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:36,100 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:36,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:36,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1592295037, now seen corresponding path program 2 times [2023-09-01 03:44:36,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:36,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19149533] [2023-09-01 03:44:36,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:44:36,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:36,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:36,105 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:36,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 03:44:36,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:44:36,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:44:36,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:44:36,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:36,317 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:44:36,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:44:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 03:44:36,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:44:36,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:36,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19149533] [2023-09-01 03:44:36,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19149533] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:44:36,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:44:36,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:44:36,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943068715] [2023-09-01 03:44:36,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:44:36,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:44:36,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:36,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:44:36,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:44:36,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-09-01 03:44:36,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 43 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:36,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:36,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-09-01 03:44:36,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:36,909 INFO L130 PetriNetUnfolder]: 2072/3372 cut-off events. [2023-09-01 03:44:36,909 INFO L131 PetriNetUnfolder]: For 2544/2544 co-relation queries the response was YES. [2023-09-01 03:44:36,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7050 conditions, 3372 events. 2072/3372 cut-off events. For 2544/2544 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18839 event pairs, 1469 based on Foata normal form. 468/3403 useless extension candidates. Maximal degree in co-relation 7023. Up to 2966 conditions per place. [2023-09-01 03:44:36,921 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 31 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2023-09-01 03:44:36,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 41 transitions, 272 flow [2023-09-01 03:44:36,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:44:36,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:44:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 569 transitions. [2023-09-01 03:44:36,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4271771771771772 [2023-09-01 03:44:36,932 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 569 transitions. [2023-09-01 03:44:36,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 569 transitions. [2023-09-01 03:44:36,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:36,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 569 transitions. [2023-09-01 03:44:36,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:36,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:36,936 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:36,936 INFO L175 Difference]: Start difference. First operand has 67 places, 43 transitions, 212 flow. Second operand 4 states and 569 transitions. [2023-09-01 03:44:36,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 41 transitions, 272 flow [2023-09-01 03:44:36,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 41 transitions, 268 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:44:36,939 INFO L231 Difference]: Finished difference. Result has 65 places, 41 transitions, 206 flow [2023-09-01 03:44:36,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=65, PETRI_TRANSITIONS=41} [2023-09-01 03:44:36,940 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2023-09-01 03:44:36,940 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 41 transitions, 206 flow [2023-09-01 03:44:36,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:36,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:36,941 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-09-01 03:44:36,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 03:44:37,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:37,150 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:44:37,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:37,150 INFO L85 PathProgramCache]: Analyzing trace with hash 668966215, now seen corresponding path program 3 times [2023-09-01 03:44:37,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:44:37,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708832370] [2023-09-01 03:44:37,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:44:37,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:44:37,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:44:37,152 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:44:37,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 03:44:37,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 03:44:37,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:44:37,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:44:37,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:37,494 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:44:37,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:44:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:37,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:44:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:39,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:44:39,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708832370] [2023-09-01 03:44:39,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708832370] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:44:39,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:44:39,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-09-01 03:44:39,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404093818] [2023-09-01 03:44:39,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:44:39,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:44:39,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:44:39,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:44:39,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:44:51,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-09-01 03:44:51,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 41 transitions, 206 flow. Second operand has 24 states, 24 states have (on average 136.0) internal successors, (3264), 24 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:51,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:51,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-09-01 03:44:51,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:45:08,125 INFO L130 PetriNetUnfolder]: 5030/8053 cut-off events. [2023-09-01 03:45:08,125 INFO L131 PetriNetUnfolder]: For 1337/1337 co-relation queries the response was YES. [2023-09-01 03:45:08,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17348 conditions, 8053 events. 5030/8053 cut-off events. For 1337/1337 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 46969 event pairs, 3705 based on Foata normal form. 12/6973 useless extension candidates. Maximal degree in co-relation 17322. Up to 1135 conditions per place. [2023-09-01 03:45:08,149 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 439 selfloop transitions, 24 changer transitions 1/467 dead transitions. [2023-09-01 03:45:08,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 467 transitions, 2400 flow [2023-09-01 03:45:08,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 03:45:08,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 03:45:08,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3716 transitions. [2023-09-01 03:45:08,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.464964964964965 [2023-09-01 03:45:08,159 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3716 transitions. [2023-09-01 03:45:08,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3716 transitions. [2023-09-01 03:45:08,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:45:08,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3716 transitions. [2023-09-01 03:45:08,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 154.83333333333334) internal successors, (3716), 24 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:08,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:08,179 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 333.0) internal successors, (8325), 25 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:08,179 INFO L175 Difference]: Start difference. First operand has 65 places, 41 transitions, 206 flow. Second operand 24 states and 3716 transitions. [2023-09-01 03:45:08,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 467 transitions, 2400 flow [2023-09-01 03:45:08,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 467 transitions, 2375 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:45:08,187 INFO L231 Difference]: Finished difference. Result has 99 places, 54 transitions, 385 flow [2023-09-01 03:45:08,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=385, PETRI_PLACES=99, PETRI_TRANSITIONS=54} [2023-09-01 03:45:08,187 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 48 predicate places. [2023-09-01 03:45:08,188 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 54 transitions, 385 flow [2023-09-01 03:45:08,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 136.0) internal successors, (3264), 24 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:08,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:45:08,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:45:08,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 03:45:08,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:45:08,399 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:45:08,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:45:08,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2035185124, now seen corresponding path program 1 times [2023-09-01 03:45:08,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:45:08,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620249183] [2023-09-01 03:45:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:45:08,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:45:08,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:45:08,402 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:45:08,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 03:45:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:45:08,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:45:08,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:45:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:45:08,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:45:08,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:45:08,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620249183] [2023-09-01 03:45:08,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620249183] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:45:08,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:45:08,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:45:08,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955810069] [2023-09-01 03:45:08,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:45:08,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:45:08,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:45:08,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:45:08,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:45:08,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 333 [2023-09-01 03:45:08,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 54 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:08,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:45:08,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 333 [2023-09-01 03:45:08,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:45:09,441 INFO L130 PetriNetUnfolder]: 5044/8395 cut-off events. [2023-09-01 03:45:09,442 INFO L131 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2023-09-01 03:45:09,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18145 conditions, 8395 events. 5044/8395 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 53403 event pairs, 304 based on Foata normal form. 610/7894 useless extension candidates. Maximal degree in co-relation 18106. Up to 2744 conditions per place. [2023-09-01 03:45:09,498 INFO L137 encePairwiseOnDemand]: 328/333 looper letters, 73 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-09-01 03:45:09,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 80 transitions, 607 flow [2023-09-01 03:45:09,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:45:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:45:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 752 transitions. [2023-09-01 03:45:09,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45165165165165166 [2023-09-01 03:45:09,501 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 752 transitions. [2023-09-01 03:45:09,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 752 transitions. [2023-09-01 03:45:09,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:45:09,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 752 transitions. [2023-09-01 03:45:09,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:09,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:09,510 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:09,511 INFO L175 Difference]: Start difference. First operand has 99 places, 54 transitions, 385 flow. Second operand 5 states and 752 transitions. [2023-09-01 03:45:09,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 80 transitions, 607 flow [2023-09-01 03:45:09,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 80 transitions, 556 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-09-01 03:45:09,517 INFO L231 Difference]: Finished difference. Result has 95 places, 57 transitions, 365 flow [2023-09-01 03:45:09,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=365, PETRI_PLACES=95, PETRI_TRANSITIONS=57} [2023-09-01 03:45:09,519 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 44 predicate places. [2023-09-01 03:45:09,519 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 57 transitions, 365 flow [2023-09-01 03:45:09,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:09,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:45:09,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:45:09,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 03:45:09,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:45:09,729 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:45:09,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:45:09,729 INFO L85 PathProgramCache]: Analyzing trace with hash 936620446, now seen corresponding path program 2 times [2023-09-01 03:45:09,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:45:09,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074595296] [2023-09-01 03:45:09,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:45:09,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:45:09,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:45:09,731 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:45:09,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 03:45:09,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:45:09,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:45:09,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 03:45:09,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:45:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:45:09,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:45:09,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:45:09,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074595296] [2023-09-01 03:45:09,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074595296] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:45:09,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:45:09,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:45:09,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435410879] [2023-09-01 03:45:09,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:45:09,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:45:09,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:45:09,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:45:09,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:45:09,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 333 [2023-09-01 03:45:09,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 57 transitions, 365 flow. Second operand has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:09,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:45:09,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 333 [2023-09-01 03:45:09,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:45:11,623 INFO L130 PetriNetUnfolder]: 10639/16343 cut-off events. [2023-09-01 03:45:11,623 INFO L131 PetriNetUnfolder]: For 5532/5532 co-relation queries the response was YES. [2023-09-01 03:45:11,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40490 conditions, 16343 events. 10639/16343 cut-off events. For 5532/5532 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 102560 event pairs, 739 based on Foata normal form. 408/14414 useless extension candidates. Maximal degree in co-relation 40447. Up to 5960 conditions per place. [2023-09-01 03:45:11,676 INFO L137 encePairwiseOnDemand]: 326/333 looper letters, 77 selfloop transitions, 11 changer transitions 5/94 dead transitions. [2023-09-01 03:45:11,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 94 transitions, 653 flow [2023-09-01 03:45:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 03:45:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 03:45:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1017 transitions. [2023-09-01 03:45:11,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362934362934363 [2023-09-01 03:45:11,680 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1017 transitions. [2023-09-01 03:45:11,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1017 transitions. [2023-09-01 03:45:11,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:45:11,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1017 transitions. [2023-09-01 03:45:11,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 145.28571428571428) internal successors, (1017), 7 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:11,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:11,685 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 333.0) internal successors, (2664), 8 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:11,685 INFO L175 Difference]: Start difference. First operand has 95 places, 57 transitions, 365 flow. Second operand 7 states and 1017 transitions. [2023-09-01 03:45:11,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 94 transitions, 653 flow [2023-09-01 03:45:11,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 649 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:45:11,693 INFO L231 Difference]: Finished difference. Result has 102 places, 55 transitions, 381 flow [2023-09-01 03:45:11,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=381, PETRI_PLACES=102, PETRI_TRANSITIONS=55} [2023-09-01 03:45:11,694 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 51 predicate places. [2023-09-01 03:45:11,694 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 55 transitions, 381 flow [2023-09-01 03:45:11,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:11,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:45:11,694 INFO L208 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] [2023-09-01 03:45:11,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 03:45:11,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:45:11,903 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:45:11,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:45:11,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1631084858, now seen corresponding path program 1 times [2023-09-01 03:45:11,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:45:11,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809256453] [2023-09-01 03:45:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:45:11,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:45:11,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:45:11,905 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:45:11,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 03:45:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:45:11,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:45:11,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:45:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:45:12,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:45:12,031 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:45:12,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809256453] [2023-09-01 03:45:12,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809256453] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:45:12,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:45:12,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:45:12,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732505950] [2023-09-01 03:45:12,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:45:12,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:45:12,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:45:12,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:45:12,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:45:12,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 333 [2023-09-01 03:45:12,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 55 transitions, 381 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:12,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:45:12,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 333 [2023-09-01 03:45:12,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:45:12,996 INFO L130 PetriNetUnfolder]: 4083/7667 cut-off events. [2023-09-01 03:45:12,996 INFO L131 PetriNetUnfolder]: For 11273/11273 co-relation queries the response was YES. [2023-09-01 03:45:13,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21818 conditions, 7667 events. 4083/7667 cut-off events. For 11273/11273 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 53361 event pairs, 1740 based on Foata normal form. 280/7067 useless extension candidates. Maximal degree in co-relation 21772. Up to 5261 conditions per place. [2023-09-01 03:45:13,042 INFO L137 encePairwiseOnDemand]: 330/333 looper letters, 56 selfloop transitions, 2 changer transitions 3/66 dead transitions. [2023-09-01 03:45:13,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 66 transitions, 537 flow [2023-09-01 03:45:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:45:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:45:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-09-01 03:45:13,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46146146146146144 [2023-09-01 03:45:13,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-09-01 03:45:13,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-09-01 03:45:13,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:45:13,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-09-01 03:45:13,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:13,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:13,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:13,047 INFO L175 Difference]: Start difference. First operand has 102 places, 55 transitions, 381 flow. Second operand 3 states and 461 transitions. [2023-09-01 03:45:13,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 66 transitions, 537 flow [2023-09-01 03:45:13,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 66 transitions, 505 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-09-01 03:45:13,083 INFO L231 Difference]: Finished difference. Result has 95 places, 56 transitions, 367 flow [2023-09-01 03:45:13,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=367, PETRI_PLACES=95, PETRI_TRANSITIONS=56} [2023-09-01 03:45:13,084 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 44 predicate places. [2023-09-01 03:45:13,084 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 56 transitions, 367 flow [2023-09-01 03:45:13,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:13,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:45:13,084 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2023-09-01 03:45:13,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-09-01 03:45:13,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:45:13,285 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:45:13,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:45:13,285 INFO L85 PathProgramCache]: Analyzing trace with hash -643723961, now seen corresponding path program 4 times [2023-09-01 03:45:13,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:45:13,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293444005] [2023-09-01 03:45:13,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:45:13,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:45:13,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:45:13,286 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:45:13,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 03:45:13,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:45:13,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:45:13,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 03:45:13,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:45:13,556 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:45:13,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:45:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:45:14,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:45:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:45:23,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:45:23,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293444005] [2023-09-01 03:45:23,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293444005] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:45:23,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:45:23,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2023-09-01 03:45:23,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446142589] [2023-09-01 03:45:23,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:45:23,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-09-01 03:45:23,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:45:23,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-09-01 03:45:23,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2023-09-01 03:46:20,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 333 [2023-09-01 03:46:20,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 56 transitions, 367 flow. Second operand has 48 states, 48 states have (on average 136.0) internal successors, (6528), 48 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:46:20,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:46:20,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 333 [2023-09-01 03:46:20,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:46:43,560 WARN L222 SmtUtils]: Spent 15.39s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:46:58,798 WARN L222 SmtUtils]: Spent 13.78s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:47:11,698 WARN L222 SmtUtils]: Spent 11.46s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:47:21,958 WARN L222 SmtUtils]: Spent 8.67s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:47:32,567 WARN L222 SmtUtils]: Spent 9.07s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:47:42,242 WARN L222 SmtUtils]: Spent 7.89s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:48:39,528 INFO L130 PetriNetUnfolder]: 9182/17240 cut-off events. [2023-09-01 03:48:39,528 INFO L131 PetriNetUnfolder]: For 22077/22077 co-relation queries the response was YES. [2023-09-01 03:48:39,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47762 conditions, 17240 events. 9182/17240 cut-off events. For 22077/22077 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 124062 event pairs, 7110 based on Foata normal form. 24/15408 useless extension candidates. Maximal degree in co-relation 47718. Up to 3691 conditions per place. [2023-09-01 03:48:39,615 INFO L137 encePairwiseOnDemand]: 329/333 looper letters, 947 selfloop transitions, 48 changer transitions 0/1000 dead transitions. [2023-09-01 03:48:39,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 1000 transitions, 6094 flow [2023-09-01 03:48:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 03:48:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 03:48:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 7454 transitions. [2023-09-01 03:48:39,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634134134134136 [2023-09-01 03:48:39,623 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 7454 transitions. [2023-09-01 03:48:39,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 7454 transitions. [2023-09-01 03:48:39,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:48:39,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 7454 transitions. [2023-09-01 03:48:39,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 155.29166666666666) internal successors, (7454), 48 states have internal predecessors, (7454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:39,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 333.0) internal successors, (16317), 49 states have internal predecessors, (16317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:39,649 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 333.0) internal successors, (16317), 49 states have internal predecessors, (16317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:39,650 INFO L175 Difference]: Start difference. First operand has 95 places, 56 transitions, 367 flow. Second operand 48 states and 7454 transitions. [2023-09-01 03:48:39,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 1000 transitions, 6094 flow [2023-09-01 03:48:39,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 1000 transitions, 5778 flow, removed 135 selfloop flow, removed 2 redundant places. [2023-09-01 03:48:39,781 INFO L231 Difference]: Finished difference. Result has 165 places, 81 transitions, 717 flow [2023-09-01 03:48:39,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=717, PETRI_PLACES=165, PETRI_TRANSITIONS=81} [2023-09-01 03:48:39,782 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 114 predicate places. [2023-09-01 03:48:39,782 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 81 transitions, 717 flow [2023-09-01 03:48:39,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 136.0) internal successors, (6528), 48 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:39,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:39,783 INFO L208 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] [2023-09-01 03:48:39,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-09-01 03:48:39,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:48:39,995 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:48:39,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:39,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1027074895, now seen corresponding path program 1 times [2023-09-01 03:48:39,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:48:39,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954211236] [2023-09-01 03:48:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:48:39,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:48:39,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:48:39,997 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:48:39,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 03:48:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:48:40,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:48:40,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:48:40,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:48:40,942 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:48:40,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 70 [2023-09-01 03:48:49,122 WARN L222 SmtUtils]: Spent 7.52s on a formula simplification. DAG size of input: 98 DAG size of output: 23 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:48:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:48:50,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:48:50,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954211236] [2023-09-01 03:48:50,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954211236] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:48:50,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:48:50,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-09-01 03:48:50,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336764726] [2023-09-01 03:48:50,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:48:50,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 03:48:50,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:48:50,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 03:48:50,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-09-01 03:48:52,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 333 [2023-09-01 03:48:52,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 81 transitions, 717 flow. Second operand has 20 states, 20 states have (on average 122.2) internal successors, (2444), 20 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:52,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:52,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 333 [2023-09-01 03:48:52,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:49:06,510 INFO L130 PetriNetUnfolder]: 29972/50810 cut-off events. [2023-09-01 03:49:06,510 INFO L131 PetriNetUnfolder]: For 28029/28029 co-relation queries the response was YES. [2023-09-01 03:49:06,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134128 conditions, 50810 events. 29972/50810 cut-off events. For 28029/28029 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 377069 event pairs, 540 based on Foata normal form. 1080/47705 useless extension candidates. Maximal degree in co-relation 134059. Up to 11295 conditions per place. [2023-09-01 03:49:06,960 INFO L137 encePairwiseOnDemand]: 319/333 looper letters, 196 selfloop transitions, 55 changer transitions 12/263 dead transitions. [2023-09-01 03:49:06,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 263 transitions, 1764 flow [2023-09-01 03:49:06,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 03:49:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 03:49:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3451 transitions. [2023-09-01 03:49:06,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38382827271716163 [2023-09-01 03:49:06,965 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3451 transitions. [2023-09-01 03:49:06,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3451 transitions. [2023-09-01 03:49:06,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:49:06,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3451 transitions. [2023-09-01 03:49:06,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 127.81481481481481) internal successors, (3451), 27 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:49:06,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 333.0) internal successors, (9324), 28 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:49:06,977 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 333.0) internal successors, (9324), 28 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:49:06,977 INFO L175 Difference]: Start difference. First operand has 165 places, 81 transitions, 717 flow. Second operand 27 states and 3451 transitions. [2023-09-01 03:49:06,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 263 transitions, 1764 flow [2023-09-01 03:49:07,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 263 transitions, 1668 flow, removed 25 selfloop flow, removed 22 redundant places. [2023-09-01 03:49:07,278 INFO L231 Difference]: Finished difference. Result has 180 places, 129 transitions, 990 flow [2023-09-01 03:49:07,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=990, PETRI_PLACES=180, PETRI_TRANSITIONS=129} [2023-09-01 03:49:07,279 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 129 predicate places. [2023-09-01 03:49:07,280 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 129 transitions, 990 flow [2023-09-01 03:49:07,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 122.2) internal successors, (2444), 20 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:49:07,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:49:07,281 INFO L208 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] [2023-09-01 03:49:07,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 03:49:07,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:49:07,491 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:49:07,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:49:07,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2064249089, now seen corresponding path program 2 times [2023-09-01 03:49:07,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:49:07,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543126852] [2023-09-01 03:49:07,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:49:07,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:49:07,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:49:07,493 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:49:07,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 03:49:07,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:49:07,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:49:07,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 03:49:07,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:49:07,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-09-01 03:49:08,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-09-01 03:49:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:49:08,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:49:09,441 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:49:09,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 117 [2023-09-01 03:49:09,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:49:09,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 11 [2023-09-01 03:49:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:49:14,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:49:14,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543126852] [2023-09-01 03:49:14,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543126852] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:49:14,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:49:14,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-09-01 03:49:14,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446307228] [2023-09-01 03:49:14,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:49:14,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 03:49:14,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:49:14,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 03:49:14,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=375, Unknown=5, NotChecked=0, Total=462 [2023-09-01 03:49:19,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 03:49:22,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 333 [2023-09-01 03:49:22,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 129 transitions, 990 flow. Second operand has 22 states, 22 states have (on average 102.27272727272727) internal successors, (2250), 22 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:49:22,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:49:22,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 333 [2023-09-01 03:49:22,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:49:51,510 INFO L130 PetriNetUnfolder]: 51043/87699 cut-off events. [2023-09-01 03:49:51,510 INFO L131 PetriNetUnfolder]: For 172532/172532 co-relation queries the response was YES. [2023-09-01 03:49:52,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325543 conditions, 87699 events. 51043/87699 cut-off events. For 172532/172532 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 725233 event pairs, 1760 based on Foata normal form. 264/87963 useless extension candidates. Maximal degree in co-relation 325462. Up to 20813 conditions per place. [2023-09-01 03:49:52,684 INFO L137 encePairwiseOnDemand]: 321/333 looper letters, 213 selfloop transitions, 100 changer transitions 68/381 dead transitions. [2023-09-01 03:49:52,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 381 transitions, 3075 flow [2023-09-01 03:49:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 03:49:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 03:49:52,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2836 transitions. [2023-09-01 03:49:52,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32755832755832753 [2023-09-01 03:49:52,690 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2836 transitions. [2023-09-01 03:49:52,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2836 transitions. [2023-09-01 03:49:52,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:49:52,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2836 transitions. [2023-09-01 03:49:52,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 109.07692307692308) internal successors, (2836), 26 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:49:52,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 333.0) internal successors, (8991), 27 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:49:52,700 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 333.0) internal successors, (8991), 27 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:49:52,700 INFO L175 Difference]: Start difference. First operand has 180 places, 129 transitions, 990 flow. Second operand 26 states and 2836 transitions. [2023-09-01 03:49:52,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 381 transitions, 3075 flow [2023-09-01 03:50:07,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 381 transitions, 2806 flow, removed 75 selfloop flow, removed 9 redundant places. [2023-09-01 03:50:07,910 INFO L231 Difference]: Finished difference. Result has 209 places, 193 transitions, 1650 flow [2023-09-01 03:50:07,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1650, PETRI_PLACES=209, PETRI_TRANSITIONS=193} [2023-09-01 03:50:07,911 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 158 predicate places. [2023-09-01 03:50:07,911 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 193 transitions, 1650 flow [2023-09-01 03:50:07,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 102.27272727272727) internal successors, (2250), 22 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:50:07,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:50:07,912 INFO L208 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] [2023-09-01 03:50:07,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 03:50:08,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:50:08,112 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:50:08,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:50:08,113 INFO L85 PathProgramCache]: Analyzing trace with hash -268424735, now seen corresponding path program 3 times [2023-09-01 03:50:08,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:50:08,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982970828] [2023-09-01 03:50:08,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:50:08,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:50:08,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:50:08,114 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:50:08,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-09-01 03:50:08,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:50:08,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:50:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 03:50:08,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:50:09,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:50:09,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-09-01 03:50:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:50:09,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:50:09,880 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (Array (_ BitVec 32) (_ BitVec 8)))) (bvsle (bvadd (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_767) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1)))) c_~d~0) c_~W~0)) is different from false [2023-09-01 03:50:10,271 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:50:10,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 117 [2023-09-01 03:50:10,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:50:10,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 11 [2023-09-01 03:50:18,625 WARN L222 SmtUtils]: Spent 7.57s on a formula simplification. DAG size of input: 118 DAG size of output: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:50:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:50:20,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:50:20,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982970828] [2023-09-01 03:50:20,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982970828] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:50:20,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:50:20,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2023-09-01 03:50:20,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026034969] [2023-09-01 03:50:20,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:50:20,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 03:50:20,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:50:20,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 03:50:20,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=343, Unknown=2, NotChecked=38, Total=462 [2023-09-01 03:50:21,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 333 [2023-09-01 03:50:21,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 193 transitions, 1650 flow. Second operand has 22 states, 22 states have (on average 102.27272727272727) internal successors, (2250), 22 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:50:21,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:50:21,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 333 [2023-09-01 03:50:21,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:51:00,932 INFO L130 PetriNetUnfolder]: 62703/107675 cut-off events. [2023-09-01 03:51:00,932 INFO L131 PetriNetUnfolder]: For 513136/513136 co-relation queries the response was YES. [2023-09-01 03:51:02,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513566 conditions, 107675 events. 62703/107675 cut-off events. For 513136/513136 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 905897 event pairs, 3608 based on Foata normal form. 264/107939 useless extension candidates. Maximal degree in co-relation 513476. Up to 26796 conditions per place. [2023-09-01 03:51:02,852 INFO L137 encePairwiseOnDemand]: 316/333 looper letters, 212 selfloop transitions, 181 changer transitions 71/464 dead transitions. [2023-09-01 03:51:02,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 464 transitions, 4539 flow [2023-09-01 03:51:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 03:51:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 03:51:02,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2840 transitions. [2023-09-01 03:51:02,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32802032802032804 [2023-09-01 03:51:02,857 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2840 transitions. [2023-09-01 03:51:02,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2840 transitions. [2023-09-01 03:51:02,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:51:02,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2840 transitions. [2023-09-01 03:51:02,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 109.23076923076923) internal successors, (2840), 26 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:02,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 333.0) internal successors, (8991), 27 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:02,867 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 333.0) internal successors, (8991), 27 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:02,867 INFO L175 Difference]: Start difference. First operand has 209 places, 193 transitions, 1650 flow. Second operand 26 states and 2840 transitions. [2023-09-01 03:51:02,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 464 transitions, 4539 flow [2023-09-01 03:51:50,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 464 transitions, 4104 flow, removed 181 selfloop flow, removed 8 redundant places. [2023-09-01 03:51:50,097 INFO L231 Difference]: Finished difference. Result has 242 places, 279 transitions, 2928 flow [2023-09-01 03:51:50,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2928, PETRI_PLACES=242, PETRI_TRANSITIONS=279} [2023-09-01 03:51:50,098 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 191 predicate places. [2023-09-01 03:51:50,098 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 279 transitions, 2928 flow [2023-09-01 03:51:50,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 102.27272727272727) internal successors, (2250), 22 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:50,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:51:50,099 INFO L208 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] [2023-09-01 03:51:50,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-09-01 03:51:50,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:51:50,300 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-09-01 03:51:50,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:51:50,300 INFO L85 PathProgramCache]: Analyzing trace with hash 627316799, now seen corresponding path program 4 times [2023-09-01 03:51:50,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:51:50,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287098742] [2023-09-01 03:51:50,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:51:50,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 03:51:50,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:51:50,302 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 03:51:50,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-09-01 03:51:50,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:51:50,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:51:50,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 03:51:50,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:51:50,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2023-09-01 03:51:51,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:51:51,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-09-01 03:51:51,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-09-01 03:51:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:51:52,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:51:53,500 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 03:51:53,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 435 treesize of output 378 [2023-09-01 03:51:53,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 37 [2023-09-01 03:51:54,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 03:51:54,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 32 [2023-09-01 03:52:05,021 WARN L222 SmtUtils]: Spent 9.69s on a formula simplification. DAG size of input: 159 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:52:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:52:07,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:52:07,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287098742] [2023-09-01 03:52:07,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287098742] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:52:07,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:52:07,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-09-01 03:52:07,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698940943] [2023-09-01 03:52:07,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:52:07,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 03:52:07,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:52:07,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 03:52:07,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=543, Unknown=9, NotChecked=0, Total=650 [2023-09-01 03:52:12,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 333 [2023-09-01 03:52:12,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 279 transitions, 2928 flow. Second operand has 26 states, 26 states have (on average 92.76923076923077) internal successors, (2412), 26 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:12,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:12,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 333 [2023-09-01 03:52:12,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:52:23,667 WARN L222 SmtUtils]: Spent 6.69s on a formula simplification. DAG size of input: 91 DAG size of output: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:52:23,861 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~v_assert~0 (_ bv1 8)) (forall ((v_ArrVal_806 (Array (_ BitVec 32) (_ BitVec 8)))) (bvsle (bvadd (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_806) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1)))) c_~d~0) c_~W~0)) (bvsle c_~d~0 c_~W~0)) is different from false [2023-09-01 03:52:30,879 WARN L222 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 67 DAG size of output: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:52:46,723 WARN L222 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 93 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:52:55,583 WARN L222 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 69 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:53:02,908 WARN L222 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 79 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 03:53:43,839 INFO L130 PetriNetUnfolder]: 93591/158407 cut-off events. [2023-09-01 03:53:43,839 INFO L131 PetriNetUnfolder]: For 1596812/1596812 co-relation queries the response was YES. [2023-09-01 03:53:46,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937607 conditions, 158407 events. 93591/158407 cut-off events. For 1596812/1596812 co-relation queries the response was YES. Maximal size of possible extension queue 1483. Compared 1388663 event pairs, 3520 based on Foata normal form. 1760/160167 useless extension candidates. Maximal degree in co-relation 937504. Up to 42373 conditions per place. [2023-09-01 03:53:46,921 INFO L137 encePairwiseOnDemand]: 318/333 looper letters, 350 selfloop transitions, 281 changer transitions 105/736 dead transitions. [2023-09-01 03:53:46,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 736 transitions, 8902 flow [2023-09-01 03:53:46,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-09-01 03:53:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-09-01 03:53:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 5568 transitions. [2023-09-01 03:53:46,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2933459775565039 [2023-09-01 03:53:46,931 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 5568 transitions. [2023-09-01 03:53:46,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 5568 transitions. [2023-09-01 03:53:46,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:53:46,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 5568 transitions. [2023-09-01 03:53:46,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 97.6842105263158) internal successors, (5568), 57 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:46,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 333.0) internal successors, (19314), 58 states have internal predecessors, (19314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:46,955 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 333.0) internal successors, (19314), 58 states have internal predecessors, (19314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:46,956 INFO L175 Difference]: Start difference. First operand has 242 places, 279 transitions, 2928 flow. Second operand 57 states and 5568 transitions. [2023-09-01 03:53:46,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 736 transitions, 8902 flow Killed by 15