./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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-more-array-sum.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 c328ca6a6071aea6db12d1e311bd2e5e22fce6c700c884e61df52925e139f834 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:38:52,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:38:52,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:38:52,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:38:52,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:38:52,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:38:52,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:38:52,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:38:52,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:38:52,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:38:52,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:38:52,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:38:52,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:38:52,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:38:52,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:38:52,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:38:52,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:38:52,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:38:52,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:38:52,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:38:52,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:38:52,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:38:52,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:38:52,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:38:52,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:38:52,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:38:52,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:38:52,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:38:52,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:38:52,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:38:52,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:38:52,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:38:52,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:38:52,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:38:52,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:38:52,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:38:52,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:38:52,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:38:52,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:38:52,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:38:52,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:38:52,915 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:38:52,956 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:38:52,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:38:52,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:38:52,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:38:52,958 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:38:52,958 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:38:52,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:38:52,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:38:52,959 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:38:52,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:38:52,960 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:38:52,960 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:38:52,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:38:52,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:38:52,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:38:52,961 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:38:52,961 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:38:52,961 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:38:52,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:38:52,962 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:38:52,962 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:38:52,962 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:38:52,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:38:52,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:38:52,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:38:52,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:38:52,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:38:52,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:38:52,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:38:52,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:38:52,963 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:38:52,964 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:38:52,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:38:52,964 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:38:52,964 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c328ca6a6071aea6db12d1e311bd2e5e22fce6c700c884e61df52925e139f834 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:38:53,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:38:53,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:38:53,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:38:53,273 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:38:53,274 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:38:53,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum.wvr.c [2023-08-30 06:38:54,525 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:38:54,701 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:38:54,701 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum.wvr.c [2023-08-30 06:38:54,707 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c59428f17/d43f1e54efe14eb8b6aae5f985360476/FLAGba350cba0 [2023-08-30 06:38:54,721 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c59428f17/d43f1e54efe14eb8b6aae5f985360476 [2023-08-30 06:38:54,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:38:54,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:38:54,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:38:54,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:38:54,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:38:54,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:38:54" (1/1) ... [2023-08-30 06:38:54,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e1f1338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:54, skipping insertion in model container [2023-08-30 06:38:54,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:38:54" (1/1) ... [2023-08-30 06:38:54,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:38:54,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:38:54,893 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-more-array-sum.wvr.c[2835,2848] [2023-08-30 06:38:54,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:38:54,917 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) [2023-08-30 06:38:54,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1728c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:54, skipping insertion in model container [2023-08-30 06:38:54,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:38:54,919 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:38:54,921 INFO L158 Benchmark]: Toolchain (without parser) took 196.69ms. Allocated memory is still 71.3MB. Free memory was 43.9MB in the beginning and 34.0MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:38:54,929 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory is still 34.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:38:54,930 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.01ms. Allocated memory is still 71.3MB. Free memory was 43.7MB in the beginning and 34.0MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:38:54,931 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory is still 34.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 195.01ms. Allocated memory is still 71.3MB. Free memory was 43.7MB in the beginning and 34.0MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 115]: 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-more-array-sum.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 c328ca6a6071aea6db12d1e311bd2e5e22fce6c700c884e61df52925e139f834 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:38:56,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:38:56,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:38:56,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:38:56,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:38:56,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:38:56,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:38:56,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:38:56,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:38:56,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:38:56,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:38:56,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:38:56,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:38:56,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:38:56,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:38:56,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:38:56,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:38:56,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:38:56,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:38:56,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:38:56,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:38:56,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:38:56,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:38:56,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:38:56,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:38:56,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:38:56,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:38:56,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:38:56,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:38:56,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:38:56,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:38:56,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:38:56,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:38:56,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:38:56,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:38:56,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:38:56,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:38:56,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:38:56,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:38:56,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:38:56,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:38:56,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:38:56,717 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:38:56,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:38:56,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:38:56,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:38:56,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:38:56,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:38:56,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:38:56,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:38:56,720 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:38:56,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:38:56,721 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:38:56,721 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:38:56,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:38:56,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:38:56,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:38:56,722 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:38:56,722 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:38:56,722 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:38:56,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:38:56,723 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:38:56,723 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:38:56,723 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:38:56,723 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:38:56,723 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:38:56,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:38:56,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:38:56,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:38:56,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:38:56,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:38:56,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:38:56,725 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:38:56,725 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:38:56,725 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:38:56,725 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:38:56,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:38:56,725 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:38:56,726 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:38:56,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c328ca6a6071aea6db12d1e311bd2e5e22fce6c700c884e61df52925e139f834 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:38:56,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:38:56,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:38:57,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:38:57,002 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:38:57,002 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:38:57,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum.wvr.c [2023-08-30 06:38:58,143 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:38:58,366 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:38:58,367 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum.wvr.c [2023-08-30 06:38:58,375 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad178cc3e/2a79b128fcd84dae8053dbb598f174fb/FLAGc5f825015 [2023-08-30 06:38:58,399 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad178cc3e/2a79b128fcd84dae8053dbb598f174fb [2023-08-30 06:38:58,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:38:58,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:38:58,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:38:58,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:38:58,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:38:58,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:38:58" (1/1) ... [2023-08-30 06:38:58,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c278668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:58, skipping insertion in model container [2023-08-30 06:38:58,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:38:58" (1/1) ... [2023-08-30 06:38:58,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:38:58,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:38:58,607 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-more-array-sum.wvr.c[2835,2848] [2023-08-30 06:38:58,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:38:58,637 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:38:58,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:38:58,670 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-more-array-sum.wvr.c[2835,2848] [2023-08-30 06:38:58,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:38:58,685 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:38:58,719 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-more-array-sum.wvr.c[2835,2848] [2023-08-30 06:38:58,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:38:58,741 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:38:58,743 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:38:58,748 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:38:58,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:58 WrapperNode [2023-08-30 06:38:58,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:38:58,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:38:58,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:38:58,751 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:38:58,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:58" (1/1) ... [2023-08-30 06:38:58,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:58" (1/1) ... [2023-08-30 06:38:58,824 INFO L138 Inliner]: procedures = 27, calls = 58, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 274 [2023-08-30 06:38:58,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:38:58,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:38:58,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:38:58,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:38:58,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:58" (1/1) ... [2023-08-30 06:38:58,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:58" (1/1) ... [2023-08-30 06:38:58,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:58" (1/1) ... [2023-08-30 06:38:58,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:58" (1/1) ... [2023-08-30 06:38:58,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:58" (1/1) ... [2023-08-30 06:38:58,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:58" (1/1) ... [2023-08-30 06:38:58,883 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:58" (1/1) ... [2023-08-30 06:38:58,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:58" (1/1) ... [2023-08-30 06:38:58,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:38:58,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:38:58,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:38:58,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:38:58,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:58" (1/1) ... [2023-08-30 06:38:58,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:38:58,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:38:58,922 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) [2023-08-30 06:38:58,946 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 [2023-08-30 06:38:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:38:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:38:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:38:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:38:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:38:58,959 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:38:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:38:58,960 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:38:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:38:58,960 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:38:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:38:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:38:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:38:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:38:58,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:38:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:38:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:38:58,963 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:38:59,103 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:38:59,110 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:38:59,687 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:39:00,013 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:39:00,014 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 06:39:00,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:39:00 BoogieIcfgContainer [2023-08-30 06:39:00,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:39:00,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:39:00,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:39:00,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:39:00,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:38:58" (1/3) ... [2023-08-30 06:39:00,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385c7538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:39:00, skipping insertion in model container [2023-08-30 06:39:00,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:38:58" (2/3) ... [2023-08-30 06:39:00,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385c7538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:39:00, skipping insertion in model container [2023-08-30 06:39:00,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:39:00" (3/3) ... [2023-08-30 06:39:00,022 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum.wvr.c [2023-08-30 06:39:00,041 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:39:00,041 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 06:39:00,041 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:39:00,152 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 06:39:00,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 211 transitions, 446 flow [2023-08-30 06:39:00,282 INFO L130 PetriNetUnfolder]: 16/208 cut-off events. [2023-08-30 06:39:00,282 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:39:00,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 16/208 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 252 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 158. Up to 2 conditions per place. [2023-08-30 06:39:00,288 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 211 transitions, 446 flow [2023-08-30 06:39:00,297 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 204 transitions, 426 flow [2023-08-30 06:39:00,303 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:39:00,315 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 204 transitions, 426 flow [2023-08-30 06:39:00,321 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 204 transitions, 426 flow [2023-08-30 06:39:00,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 204 transitions, 426 flow [2023-08-30 06:39:00,372 INFO L130 PetriNetUnfolder]: 16/204 cut-off events. [2023-08-30 06:39:00,372 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:39:00,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 204 events. 16/204 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 250 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 158. Up to 2 conditions per place. [2023-08-30 06:39:00,376 INFO L119 LiptonReduction]: Number of co-enabled transitions 2970 [2023-08-30 06:39:24,933 INFO L134 LiptonReduction]: Checked pairs total: 4447 [2023-08-30 06:39:24,933 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-30 06:39:24,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:39:24,950 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;@f1427b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:39:24,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-08-30 06:39:24,953 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:39:24,953 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:39:24,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:24,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:39:24,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:39:24,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:24,958 INFO L85 PathProgramCache]: Analyzing trace with hash 35461, now seen corresponding path program 1 times [2023-08-30 06:39:24,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:24,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889160866] [2023-08-30 06:39:24,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:39:24,973 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 [2023-08-30 06:39:24,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:24,976 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) [2023-08-30 06:39:24,977 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 [2023-08-30 06:39:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:39:25,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:39:25,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:25,226 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:39:25,227 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 [2023-08-30 06:39:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:25,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:39:25,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:25,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889160866] [2023-08-30 06:39:25,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889160866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:39:25,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:39:25,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:39:25,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946459798] [2023-08-30 06:39:25,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:39:25,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:39:25,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:25,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:39:25,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:39:25,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 426 [2023-08-30 06:39:25,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:25,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:39:25,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 426 [2023-08-30 06:39:25,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:39:27,441 INFO L130 PetriNetUnfolder]: 9544/11885 cut-off events. [2023-08-30 06:39:27,442 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2023-08-30 06:39:27,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23920 conditions, 11885 events. 9544/11885 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 55218 event pairs, 4848 based on Foata normal form. 0/2845 useless extension candidates. Maximal degree in co-relation 21472. Up to 11829 conditions per place. [2023-08-30 06:39:27,515 INFO L137 encePairwiseOnDemand]: 422/426 looper letters, 50 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-08-30 06:39:27,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 54 transitions, 228 flow [2023-08-30 06:39:27,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:39:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:39:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-08-30 06:39:27,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44835680751173707 [2023-08-30 06:39:27,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-08-30 06:39:27,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-08-30 06:39:27,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:39:27,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-08-30 06:39:27,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:27,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:27,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:27,548 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 132 flow. Second operand 3 states and 573 transitions. [2023-08-30 06:39:27,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 54 transitions, 228 flow [2023-08-30 06:39:27,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 216 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 06:39:27,561 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 116 flow [2023-08-30 06:39:27,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-08-30 06:39:27,565 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -7 predicate places. [2023-08-30 06:39:27,566 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 116 flow [2023-08-30 06:39:27,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:27,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:27,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:39:27,580 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 (2)] Ended with exit code 0 [2023-08-30 06:39:27,775 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 [2023-08-30 06:39:27,776 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:39:27,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:27,779 INFO L85 PathProgramCache]: Analyzing trace with hash 35460, now seen corresponding path program 1 times [2023-08-30 06:39:27,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:27,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802377362] [2023-08-30 06:39:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:39:27,780 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 [2023-08-30 06:39:27,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:27,781 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) [2023-08-30 06:39:27,783 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 [2023-08-30 06:39:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:39:27,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:39:27,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:27,974 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:39:27,974 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 [2023-08-30 06:39:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:28,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:39:28,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802377362] [2023-08-30 06:39:28,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802377362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:39:28,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:39:28,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:39:28,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519133500] [2023-08-30 06:39:28,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:39:28,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:39:28,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:28,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:39:28,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:39:28,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 426 [2023-08-30 06:39:28,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:28,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:39:28,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 426 [2023-08-30 06:39:28,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:39:31,001 INFO L130 PetriNetUnfolder]: 19073/23753 cut-off events. [2023-08-30 06:39:31,001 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 06:39:31,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47525 conditions, 23753 events. 19073/23753 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 2192. Compared 119060 event pairs, 9693 based on Foata normal form. 0/5697 useless extension candidates. Maximal degree in co-relation 47519. Up to 11826 conditions per place. [2023-08-30 06:39:31,118 INFO L137 encePairwiseOnDemand]: 420/426 looper letters, 95 selfloop transitions, 4 changer transitions 0/102 dead transitions. [2023-08-30 06:39:31,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 102 transitions, 416 flow [2023-08-30 06:39:31,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:39:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:39:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-08-30 06:39:31,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48513302034428796 [2023-08-30 06:39:31,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-08-30 06:39:31,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-08-30 06:39:31,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:39:31,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-08-30 06:39:31,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:31,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:31,129 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:31,129 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 116 flow. Second operand 3 states and 620 transitions. [2023-08-30 06:39:31,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 102 transitions, 416 flow [2023-08-30 06:39:31,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 102 transitions, 415 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:39:31,133 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 147 flow [2023-08-30 06:39:31,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-08-30 06:39:31,135 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2023-08-30 06:39:31,136 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 147 flow [2023-08-30 06:39:31,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:31,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:31,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:39:31,151 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 [2023-08-30 06:39:31,347 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 [2023-08-30 06:39:31,348 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:39:31,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:31,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1103174, now seen corresponding path program 1 times [2023-08-30 06:39:31,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:31,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795399205] [2023-08-30 06:39:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:39:31,350 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 [2023-08-30 06:39:31,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:31,352 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) [2023-08-30 06:39:31,354 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 [2023-08-30 06:39:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:39:31,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:39:31,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:31,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:39:31,466 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:31,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795399205] [2023-08-30 06:39:31,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795399205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:39:31,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:39:31,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:39:31,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270479379] [2023-08-30 06:39:31,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:39:31,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:39:31,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:31,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:39:31,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:39:31,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 426 [2023-08-30 06:39:31,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:31,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:39:31,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 426 [2023-08-30 06:39:31,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:39:33,209 INFO L130 PetriNetUnfolder]: 9544/11888 cut-off events. [2023-08-30 06:39:33,209 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 06:39:33,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23802 conditions, 11888 events. 9544/11888 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 55298 event pairs, 4848 based on Foata normal form. 3/2853 useless extension candidates. Maximal degree in co-relation 23793. Up to 11830 conditions per place. [2023-08-30 06:39:33,259 INFO L137 encePairwiseOnDemand]: 419/426 looper letters, 49 selfloop transitions, 4 changer transitions 1/57 dead transitions. [2023-08-30 06:39:33,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 57 transitions, 255 flow [2023-08-30 06:39:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:39:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:39:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 757 transitions. [2023-08-30 06:39:33,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4442488262910798 [2023-08-30 06:39:33,262 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 757 transitions. [2023-08-30 06:39:33,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 757 transitions. [2023-08-30 06:39:33,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:39:33,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 757 transitions. [2023-08-30 06:39:33,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.25) internal successors, (757), 4 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:33,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:33,269 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:33,269 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 147 flow. Second operand 4 states and 757 transitions. [2023-08-30 06:39:33,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 57 transitions, 255 flow [2023-08-30 06:39:33,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:39:33,272 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 159 flow [2023-08-30 06:39:33,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-08-30 06:39:33,273 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2023-08-30 06:39:33,273 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 159 flow [2023-08-30 06:39:33,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:33,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:33,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:39:33,285 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 [2023-08-30 06:39:33,483 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 [2023-08-30 06:39:33,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:39:33,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:33,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1102015, now seen corresponding path program 1 times [2023-08-30 06:39:33,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:33,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843201341] [2023-08-30 06:39:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:39:33,484 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 [2023-08-30 06:39:33,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:33,486 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) [2023-08-30 06:39:33,489 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 [2023-08-30 06:39:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:39:33,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:39:33,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:33,650 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:39:33,650 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 [2023-08-30 06:39:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:33,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:39:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:33,886 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:33,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843201341] [2023-08-30 06:39:33,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843201341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:39:33,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:39:33,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:39:33,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702502574] [2023-08-30 06:39:33,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:39:33,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:39:33,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:33,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:39:33,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:39:34,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 426 [2023-08-30 06:39:34,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 159 flow. Second operand has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:34,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:39:34,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 426 [2023-08-30 06:39:34,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:39:37,876 INFO L130 PetriNetUnfolder]: 19081/23767 cut-off events. [2023-08-30 06:39:37,876 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 06:39:37,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47606 conditions, 23767 events. 19081/23767 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 2173. Compared 119918 event pairs, 9693 based on Foata normal form. 0/5711 useless extension candidates. Maximal degree in co-relation 47595. Up to 11825 conditions per place. [2023-08-30 06:39:37,976 INFO L137 encePairwiseOnDemand]: 417/426 looper letters, 94 selfloop transitions, 19 changer transitions 0/116 dead transitions. [2023-08-30 06:39:37,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 116 transitions, 574 flow [2023-08-30 06:39:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:39:37,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:39:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1097 transitions. [2023-08-30 06:39:37,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4291862284820031 [2023-08-30 06:39:37,982 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1097 transitions. [2023-08-30 06:39:37,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1097 transitions. [2023-08-30 06:39:37,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:39:37,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1097 transitions. [2023-08-30 06:39:37,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.83333333333334) internal successors, (1097), 6 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:37,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 426.0) internal successors, (2982), 7 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:37,990 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 426.0) internal successors, (2982), 7 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:37,990 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 159 flow. Second operand 6 states and 1097 transitions. [2023-08-30 06:39:37,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 116 transitions, 574 flow [2023-08-30 06:39:37,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 116 transitions, 536 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-30 06:39:37,998 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 305 flow [2023-08-30 06:39:37,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2023-08-30 06:39:37,999 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2023-08-30 06:39:37,999 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 305 flow [2023-08-30 06:39:38,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:38,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:38,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:39:38,015 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 [2023-08-30 06:39:38,216 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 [2023-08-30 06:39:38,216 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:39:38,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:38,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1059158904, now seen corresponding path program 1 times [2023-08-30 06:39:38,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:38,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942586617] [2023-08-30 06:39:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:39:38,218 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 [2023-08-30 06:39:38,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:38,220 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) [2023-08-30 06:39:38,224 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 [2023-08-30 06:39:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:39:38,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 06:39:38,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:38,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:39:38,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:39:38,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:39:38,487 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:39:38,487 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 17 treesize of output 34 [2023-08-30 06:39:38,525 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 06:39:38,526 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 90 treesize of output 89 [2023-08-30 06:39:38,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:39:38,778 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2023-08-30 06:39:38,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2023-08-30 06:39:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:39:38,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:39:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:39:39,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:39,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942586617] [2023-08-30 06:39:39,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942586617] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:39:39,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:39:39,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:39:39,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214159059] [2023-08-30 06:39:39,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:39:39,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:39:39,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:39:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:39:41,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 426 [2023-08-30 06:39:41,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 305 flow. Second operand has 8 states, 8 states have (on average 160.25) internal successors, (1282), 8 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:41,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:39:41,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 426 [2023-08-30 06:39:41,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:39:48,671 INFO L130 PetriNetUnfolder]: 44150/55505 cut-off events. [2023-08-30 06:39:48,672 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-08-30 06:39:48,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111233 conditions, 55505 events. 44150/55505 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 4036. Compared 311747 event pairs, 22359 based on Foata normal form. 0/14349 useless extension candidates. Maximal degree in co-relation 111219. Up to 18374 conditions per place. [2023-08-30 06:39:48,958 INFO L137 encePairwiseOnDemand]: 416/426 looper letters, 220 selfloop transitions, 39 changer transitions 0/262 dead transitions. [2023-08-30 06:39:48,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 262 transitions, 1397 flow [2023-08-30 06:39:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 06:39:48,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 06:39:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2798 transitions. [2023-08-30 06:39:48,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41050469483568075 [2023-08-30 06:39:48,967 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2798 transitions. [2023-08-30 06:39:48,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2798 transitions. [2023-08-30 06:39:48,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:39:48,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2798 transitions. [2023-08-30 06:39:48,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 174.875) internal successors, (2798), 16 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:48,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 426.0) internal successors, (7242), 17 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:48,985 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 426.0) internal successors, (7242), 17 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:48,985 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 305 flow. Second operand 16 states and 2798 transitions. [2023-08-30 06:39:48,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 262 transitions, 1397 flow [2023-08-30 06:39:48,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 262 transitions, 1336 flow, removed 26 selfloop flow, removed 1 redundant places. [2023-08-30 06:39:48,993 INFO L231 Difference]: Finished difference. Result has 81 places, 94 transitions, 545 flow [2023-08-30 06:39:48,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=545, PETRI_PLACES=81, PETRI_TRANSITIONS=94} [2023-08-30 06:39:48,996 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 19 predicate places. [2023-08-30 06:39:48,996 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 94 transitions, 545 flow [2023-08-30 06:39:48,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 160.25) internal successors, (1282), 8 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:48,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:48,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:39:49,010 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 [2023-08-30 06:39:49,207 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 [2023-08-30 06:39:49,207 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:39:49,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:49,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1059158905, now seen corresponding path program 1 times [2023-08-30 06:39:49,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:49,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350473239] [2023-08-30 06:39:49,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:39:49,208 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 [2023-08-30 06:39:49,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:49,209 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) [2023-08-30 06:39:49,210 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 [2023-08-30 06:39:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:39:49,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 06:39:49,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:49,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:39:49,414 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 06:39:49,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 06:39:49,938 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-08-30 06:39:49,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-08-30 06:39:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:39:50,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:39:50,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:50,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350473239] [2023-08-30 06:39:50,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350473239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:39:50,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:39:50,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:39:50,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163091613] [2023-08-30 06:39:50,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:39:50,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:39:50,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:50,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:39:50,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:39:50,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 426 [2023-08-30 06:39:50,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 94 transitions, 545 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:50,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:39:50,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 426 [2023-08-30 06:39:50,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:39:54,182 INFO L130 PetriNetUnfolder]: 31165/39825 cut-off events. [2023-08-30 06:39:54,182 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2023-08-30 06:39:54,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79863 conditions, 39825 events. 31165/39825 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 2597. Compared 226381 event pairs, 15660 based on Foata normal form. 0/11525 useless extension candidates. Maximal degree in co-relation 79846. Up to 39489 conditions per place. [2023-08-30 06:39:54,390 INFO L137 encePairwiseOnDemand]: 423/426 looper letters, 78 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-30 06:39:54,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 82 transitions, 601 flow [2023-08-30 06:39:54,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:39:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:39:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-08-30 06:39:54,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4522691705790297 [2023-08-30 06:39:54,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-08-30 06:39:54,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-08-30 06:39:54,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:39:54,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-08-30 06:39:54,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 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) [2023-08-30 06:39:54,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:54,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:54,398 INFO L175 Difference]: Start difference. First operand has 81 places, 94 transitions, 545 flow. Second operand 3 states and 578 transitions. [2023-08-30 06:39:54,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 82 transitions, 601 flow [2023-08-30 06:39:54,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 569 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-30 06:39:54,402 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 413 flow [2023-08-30 06:39:54,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=413, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2023-08-30 06:39:54,404 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 19 predicate places. [2023-08-30 06:39:54,405 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 413 flow [2023-08-30 06:39:54,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:54,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:39:54,405 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:39:54,417 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 (7)] Ended with exit code 0 [2023-08-30 06:39:54,617 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 [2023-08-30 06:39:54,617 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:39:54,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:39:54,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1526873788, now seen corresponding path program 2 times [2023-08-30 06:39:54,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:39:54,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232023282] [2023-08-30 06:39:54,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:39:54,618 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 [2023-08-30 06:39:54,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:39:54,620 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) [2023-08-30 06:39:54,624 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 [2023-08-30 06:39:54,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:39:54,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:39:54,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 06:39:54,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:39:54,793 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:39:54,793 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 [2023-08-30 06:39:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:54,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:39:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:39:55,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:39:55,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232023282] [2023-08-30 06:39:55,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232023282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:39:55,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:39:55,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:39:55,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76079055] [2023-08-30 06:39:55,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:39:55,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:39:55,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:39:55,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:39:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:39:58,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 426 [2023-08-30 06:39:58,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 413 flow. Second operand has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:39:58,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:39:58,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 426 [2023-08-30 06:39:58,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:01,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:02,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:04,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:06,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:08,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:10,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:12,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 06:40:26,161 INFO L130 PetriNetUnfolder]: 98447/125848 cut-off events. [2023-08-30 06:40:26,161 INFO L131 PetriNetUnfolder]: For 287/287 co-relation queries the response was YES. [2023-08-30 06:40:26,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252132 conditions, 125848 events. 98447/125848 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 5858. Compared 784980 event pairs, 49542 based on Foata normal form. 21/36607 useless extension candidates. Maximal degree in co-relation 252113. Up to 19730 conditions per place. [2023-08-30 06:40:26,819 INFO L137 encePairwiseOnDemand]: 418/426 looper letters, 401 selfloop transitions, 45 changer transitions 0/449 dead transitions. [2023-08-30 06:40:26,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 449 transitions, 2360 flow [2023-08-30 06:40:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 06:40:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 06:40:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2902 transitions. [2023-08-30 06:40:26,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541471048513302 [2023-08-30 06:40:26,834 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2902 transitions. [2023-08-30 06:40:26,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2902 transitions. [2023-08-30 06:40:26,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:26,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2902 transitions. [2023-08-30 06:40:26,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 193.46666666666667) internal successors, (2902), 15 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:26,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 426.0) internal successors, (6816), 16 states have internal predecessors, (6816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:26,851 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 426.0) internal successors, (6816), 16 states have internal predecessors, (6816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:26,851 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 413 flow. Second operand 15 states and 2902 transitions. [2023-08-30 06:40:26,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 449 transitions, 2360 flow [2023-08-30 06:40:26,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 449 transitions, 2359 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:40:26,859 INFO L231 Difference]: Finished difference. Result has 104 places, 108 transitions, 805 flow [2023-08-30 06:40:26,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=805, PETRI_PLACES=104, PETRI_TRANSITIONS=108} [2023-08-30 06:40:26,859 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 42 predicate places. [2023-08-30 06:40:26,860 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 108 transitions, 805 flow [2023-08-30 06:40:26,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:26,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:26,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:40:26,870 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 (8)] Ended with exit code 0 [2023-08-30 06:40:27,070 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 [2023-08-30 06:40:27,070 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:40:27,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:27,071 INFO L85 PathProgramCache]: Analyzing trace with hash -55512832, now seen corresponding path program 1 times [2023-08-30 06:40:27,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:27,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585852495] [2023-08-30 06:40:27,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:27,071 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 [2023-08-30 06:40:27,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:27,074 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) [2023-08-30 06:40:27,077 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 [2023-08-30 06:40:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:27,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 06:40:27,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:27,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:27,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:27,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:27,274 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:40:27,274 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 17 treesize of output 34 [2023-08-30 06:40:27,288 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 [2023-08-30 06:40:27,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:27,457 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2023-08-30 06:40:27,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2023-08-30 06:40:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:40:27,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:40:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:40:27,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:27,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585852495] [2023-08-30 06:40:27,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585852495] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:40:27,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:40:27,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:40:27,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167255819] [2023-08-30 06:40:27,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:40:27,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:40:27,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:27,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:40:27,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:40:29,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 426 [2023-08-30 06:40:29,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 108 transitions, 805 flow. Second operand has 8 states, 8 states have (on average 160.75) internal successors, (1286), 8 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:29,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:29,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 426 [2023-08-30 06:40:29,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:43,842 INFO L130 PetriNetUnfolder]: 94493/120728 cut-off events. [2023-08-30 06:40:43,843 INFO L131 PetriNetUnfolder]: For 435/435 co-relation queries the response was YES. [2023-08-30 06:40:44,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242078 conditions, 120728 events. 94493/120728 cut-off events. For 435/435 co-relation queries the response was YES. Maximal size of possible extension queue 5574. Compared 746863 event pairs, 47393 based on Foata normal form. 0/35759 useless extension candidates. Maximal degree in co-relation 242048. Up to 56453 conditions per place. [2023-08-30 06:40:44,689 INFO L137 encePairwiseOnDemand]: 415/426 looper letters, 236 selfloop transitions, 45 changer transitions 0/284 dead transitions. [2023-08-30 06:40:44,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 284 transitions, 1869 flow [2023-08-30 06:40:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 06:40:44,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 06:40:44,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2785 transitions. [2023-08-30 06:40:44,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40859741784037557 [2023-08-30 06:40:44,697 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2785 transitions. [2023-08-30 06:40:44,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2785 transitions. [2023-08-30 06:40:44,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:44,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2785 transitions. [2023-08-30 06:40:44,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 174.0625) internal successors, (2785), 16 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:44,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 426.0) internal successors, (7242), 17 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:44,712 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 426.0) internal successors, (7242), 17 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:44,713 INFO L175 Difference]: Start difference. First operand has 104 places, 108 transitions, 805 flow. Second operand 16 states and 2785 transitions. [2023-08-30 06:40:44,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 284 transitions, 1869 flow [2023-08-30 06:40:44,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 284 transitions, 1747 flow, removed 32 selfloop flow, removed 4 redundant places. [2023-08-30 06:40:44,722 INFO L231 Difference]: Finished difference. Result has 120 places, 108 transitions, 846 flow [2023-08-30 06:40:44,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=846, PETRI_PLACES=120, PETRI_TRANSITIONS=108} [2023-08-30 06:40:44,723 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 58 predicate places. [2023-08-30 06:40:44,723 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 108 transitions, 846 flow [2023-08-30 06:40:44,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 160.75) internal successors, (1286), 8 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:44,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:44,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:40:44,736 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 [2023-08-30 06:40:44,934 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 [2023-08-30 06:40:44,934 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:40:44,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:44,935 INFO L85 PathProgramCache]: Analyzing trace with hash -55512831, now seen corresponding path program 1 times [2023-08-30 06:40:44,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:44,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074936215] [2023-08-30 06:40:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:44,936 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 [2023-08-30 06:40:44,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:44,937 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) [2023-08-30 06:40:44,939 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 [2023-08-30 06:40:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:45,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:40:45,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:45,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:40:45,124 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 06:40:45,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 06:40:45,254 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 06:40:45,254 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:40:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:40:45,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:40:45,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:45,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074936215] [2023-08-30 06:40:45,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074936215] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:40:45,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:40:45,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:40:45,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481814440] [2023-08-30 06:40:45,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:40:45,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:40:45,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:45,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:40:45,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:40:45,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 426 [2023-08-30 06:40:45,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 108 transitions, 846 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:45,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:40:45,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 426 [2023-08-30 06:40:45,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:40:57,591 INFO L130 PetriNetUnfolder]: 90496/115326 cut-off events. [2023-08-30 06:40:57,592 INFO L131 PetriNetUnfolder]: For 1794/1794 co-relation queries the response was YES. [2023-08-30 06:40:58,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231767 conditions, 115326 events. 90496/115326 cut-off events. For 1794/1794 co-relation queries the response was YES. Maximal size of possible extension queue 5386. Compared 709562 event pairs, 45189 based on Foata normal form. 162/34903 useless extension candidates. Maximal degree in co-relation 231730. Up to 114254 conditions per place. [2023-08-30 06:40:58,547 INFO L137 encePairwiseOnDemand]: 423/426 looper letters, 102 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-08-30 06:40:58,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 106 transitions, 1048 flow [2023-08-30 06:40:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:40:58,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:40:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2023-08-30 06:40:58,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44992175273865415 [2023-08-30 06:40:58,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2023-08-30 06:40:58,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2023-08-30 06:40:58,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:40:58,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2023-08-30 06:40:58,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:58,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:58,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:58,553 INFO L175 Difference]: Start difference. First operand has 120 places, 108 transitions, 846 flow. Second operand 3 states and 575 transitions. [2023-08-30 06:40:58,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 106 transitions, 1048 flow [2023-08-30 06:40:58,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 106 transitions, 979 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-30 06:40:58,564 INFO L231 Difference]: Finished difference. Result has 109 places, 106 transitions, 775 flow [2023-08-30 06:40:58,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=775, PETRI_PLACES=109, PETRI_TRANSITIONS=106} [2023-08-30 06:40:58,565 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 47 predicate places. [2023-08-30 06:40:58,565 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 106 transitions, 775 flow [2023-08-30 06:40:58,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:40:58,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:40:58,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:40:58,577 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 [2023-08-30 06:40:58,776 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 [2023-08-30 06:40:58,776 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:40:58,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:40:58,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1720903423, now seen corresponding path program 1 times [2023-08-30 06:40:58,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:40:58,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408427208] [2023-08-30 06:40:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:40:58,778 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 [2023-08-30 06:40:58,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:40:58,780 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) [2023-08-30 06:40:58,782 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 [2023-08-30 06:40:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:40:58,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:40:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:40:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:40:58,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:40:59,054 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 25 treesize of output 21 [2023-08-30 06:40:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:40:59,103 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:40:59,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408427208] [2023-08-30 06:40:59,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408427208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:40:59,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:40:59,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 06:40:59,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946429246] [2023-08-30 06:40:59,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:40:59,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:40:59,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:40:59,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:40:59,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:41:00,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 426 [2023-08-30 06:41:00,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 775 flow. Second operand has 10 states, 10 states have (on average 166.4) internal successors, (1664), 10 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:00,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:41:00,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 426 [2023-08-30 06:41:00,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:41:19,802 INFO L130 PetriNetUnfolder]: 139153/182536 cut-off events. [2023-08-30 06:41:19,802 INFO L131 PetriNetUnfolder]: For 2880/2880 co-relation queries the response was YES. [2023-08-30 06:41:20,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367600 conditions, 182536 events. 139153/182536 cut-off events. For 2880/2880 co-relation queries the response was YES. Maximal size of possible extension queue 9177. Compared 1280607 event pairs, 45510 based on Foata normal form. 0/61015 useless extension candidates. Maximal degree in co-relation 367563. Up to 84572 conditions per place. [2023-08-30 06:41:21,425 INFO L137 encePairwiseOnDemand]: 417/426 looper letters, 170 selfloop transitions, 47 changer transitions 0/219 dead transitions. [2023-08-30 06:41:21,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 219 transitions, 1519 flow [2023-08-30 06:41:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 06:41:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 06:41:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1648 transitions. [2023-08-30 06:41:21,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298382889932186 [2023-08-30 06:41:21,429 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1648 transitions. [2023-08-30 06:41:21,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1648 transitions. [2023-08-30 06:41:21,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:41:21,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1648 transitions. [2023-08-30 06:41:21,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 183.11111111111111) internal successors, (1648), 9 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:21,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 426.0) internal successors, (4260), 10 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:21,437 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 426.0) internal successors, (4260), 10 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:21,437 INFO L175 Difference]: Start difference. First operand has 109 places, 106 transitions, 775 flow. Second operand 9 states and 1648 transitions. [2023-08-30 06:41:21,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 219 transitions, 1519 flow [2023-08-30 06:41:21,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 219 transitions, 1518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:41:21,451 INFO L231 Difference]: Finished difference. Result has 118 places, 111 transitions, 910 flow [2023-08-30 06:41:21,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=910, PETRI_PLACES=118, PETRI_TRANSITIONS=111} [2023-08-30 06:41:21,452 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 56 predicate places. [2023-08-30 06:41:21,452 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 111 transitions, 910 flow [2023-08-30 06:41:21,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 166.4) internal successors, (1664), 10 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:21,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:41:21,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:41:21,462 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 [2023-08-30 06:41:21,662 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 [2023-08-30 06:41:21,662 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:41:21,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:41:21,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1720903424, now seen corresponding path program 1 times [2023-08-30 06:41:21,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:41:21,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760017292] [2023-08-30 06:41:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:41:21,664 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 [2023-08-30 06:41:21,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:41:21,664 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) [2023-08-30 06:41:21,669 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 [2023-08-30 06:41:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:41:21,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:41:21,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:41:21,773 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 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 06:41:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:41:21,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:41:21,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:41:21,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760017292] [2023-08-30 06:41:21,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760017292] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:41:21,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:41:21,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:41:21,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046391278] [2023-08-30 06:41:21,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:41:21,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:41:21,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:41:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:41:21,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:41:21,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 426 [2023-08-30 06:41:21,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 111 transitions, 910 flow. Second operand has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:21,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:41:21,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 426 [2023-08-30 06:41:21,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:41:33,209 INFO L130 PetriNetUnfolder]: 79226/106245 cut-off events. [2023-08-30 06:41:33,209 INFO L131 PetriNetUnfolder]: For 14185/16456 co-relation queries the response was YES. [2023-08-30 06:41:33,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227897 conditions, 106245 events. 79226/106245 cut-off events. For 14185/16456 co-relation queries the response was YES. Maximal size of possible extension queue 5545. Compared 744079 event pairs, 47883 based on Foata normal form. 2271/45617 useless extension candidates. Maximal degree in co-relation 227857. Up to 105031 conditions per place. [2023-08-30 06:41:34,043 INFO L137 encePairwiseOnDemand]: 420/426 looper letters, 79 selfloop transitions, 25 changer transitions 0/108 dead transitions. [2023-08-30 06:41:34,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 1112 flow [2023-08-30 06:41:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:41:34,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:41:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 729 transitions. [2023-08-30 06:41:34,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278169014084507 [2023-08-30 06:41:34,045 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 729 transitions. [2023-08-30 06:41:34,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 729 transitions. [2023-08-30 06:41:34,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:41:34,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 729 transitions. [2023-08-30 06:41:34,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:34,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:34,049 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:34,049 INFO L175 Difference]: Start difference. First operand has 118 places, 111 transitions, 910 flow. Second operand 4 states and 729 transitions. [2023-08-30 06:41:34,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 1112 flow [2023-08-30 06:41:34,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 108 transitions, 1052 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-30 06:41:34,078 INFO L231 Difference]: Finished difference. Result has 114 places, 108 transitions, 894 flow [2023-08-30 06:41:34,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=894, PETRI_PLACES=114, PETRI_TRANSITIONS=108} [2023-08-30 06:41:34,079 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 52 predicate places. [2023-08-30 06:41:34,079 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 108 transitions, 894 flow [2023-08-30 06:41:34,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:34,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:41:34,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:41:34,093 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 [2023-08-30 06:41:34,289 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 [2023-08-30 06:41:34,290 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:41:34,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:41:34,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1720903425, now seen corresponding path program 1 times [2023-08-30 06:41:34,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:41:34,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215247568] [2023-08-30 06:41:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:41:34,290 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 [2023-08-30 06:41:34,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:41:34,291 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) [2023-08-30 06:41:34,292 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 [2023-08-30 06:41:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:41:34,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 06:41:34,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:41:34,497 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-08-30 06:41:34,498 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 [2023-08-30 06:41:34,581 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:41:34,581 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 [2023-08-30 06:41:34,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:41:34,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 06:41:34,672 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:41:34,672 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 13 treesize of output 13 [2023-08-30 06:41:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:41:34,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:41:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:41:37,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:41:37,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215247568] [2023-08-30 06:41:37,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215247568] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:41:37,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:41:37,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-08-30 06:41:37,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361990761] [2023-08-30 06:41:37,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:41:37,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:41:37,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:41:37,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:41:37,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:41:40,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 426 [2023-08-30 06:41:40,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 108 transitions, 894 flow. Second operand has 10 states, 10 states have (on average 153.6) internal successors, (1536), 10 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:41:40,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:41:40,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 426 [2023-08-30 06:41:40,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:08,170 INFO L130 PetriNetUnfolder]: 119445/158790 cut-off events. [2023-08-30 06:42:08,170 INFO L131 PetriNetUnfolder]: For 23753/23753 co-relation queries the response was YES. [2023-08-30 06:42:08,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342990 conditions, 158790 events. 119445/158790 cut-off events. For 23753/23753 co-relation queries the response was YES. Maximal size of possible extension queue 7272. Compared 1116411 event pairs, 46132 based on Foata normal form. 0/67272 useless extension candidates. Maximal degree in co-relation 342951. Up to 32996 conditions per place. [2023-08-30 06:42:09,441 INFO L137 encePairwiseOnDemand]: 414/426 looper letters, 624 selfloop transitions, 68 changer transitions 0/694 dead transitions. [2023-08-30 06:42:09,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 694 transitions, 3838 flow [2023-08-30 06:42:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 06:42:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 06:42:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5369 transitions. [2023-08-30 06:42:09,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40655762532182343 [2023-08-30 06:42:09,449 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5369 transitions. [2023-08-30 06:42:09,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5369 transitions. [2023-08-30 06:42:09,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:09,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5369 transitions. [2023-08-30 06:42:09,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 173.19354838709677) internal successors, (5369), 31 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:09,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 426.0) internal successors, (13632), 32 states have internal predecessors, (13632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:09,469 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 426.0) internal successors, (13632), 32 states have internal predecessors, (13632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:09,469 INFO L175 Difference]: Start difference. First operand has 114 places, 108 transitions, 894 flow. Second operand 31 states and 5369 transitions. [2023-08-30 06:42:09,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 694 transitions, 3838 flow [2023-08-30 06:42:09,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 694 transitions, 3812 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:42:09,537 INFO L231 Difference]: Finished difference. Result has 148 places, 132 transitions, 1179 flow [2023-08-30 06:42:09,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1179, PETRI_PLACES=148, PETRI_TRANSITIONS=132} [2023-08-30 06:42:09,538 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 86 predicate places. [2023-08-30 06:42:09,538 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 132 transitions, 1179 flow [2023-08-30 06:42:09,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 153.6) internal successors, (1536), 10 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:09,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:42:09,538 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 06:42:09,550 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 (13)] Forceful destruction successful, exit code 0 [2023-08-30 06:42:09,750 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 [2023-08-30 06:42:09,750 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:42:09,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:42:09,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1553227453, now seen corresponding path program 2 times [2023-08-30 06:42:09,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:42:09,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229816479] [2023-08-30 06:42:09,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:42:09,751 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 [2023-08-30 06:42:09,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:42:09,752 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) [2023-08-30 06:42:09,753 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 [2023-08-30 06:42:09,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:42:09,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:42:09,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 06:42:09,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:42:09,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:09,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:09,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:09,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:42:09,915 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 06:42:09,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2023-08-30 06:42:09,935 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 06:42:09,935 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 [2023-08-30 06:42:10,038 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-08-30 06:42:10,038 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 06:42:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 06:42:10,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:42:10,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:42:10,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229816479] [2023-08-30 06:42:10,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229816479] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:42:10,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:42:10,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:42:10,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519617221] [2023-08-30 06:42:10,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:42:10,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:42:10,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:42:10,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:42:10,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:42:12,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 06:42:13,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 426 [2023-08-30 06:42:13,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 132 transitions, 1179 flow. Second operand has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:13,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:42:13,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 426 [2023-08-30 06:42:13,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:42:29,236 INFO L130 PetriNetUnfolder]: 106034/141932 cut-off events. [2023-08-30 06:42:29,236 INFO L131 PetriNetUnfolder]: For 187340/197699 co-relation queries the response was YES. [2023-08-30 06:42:30,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340195 conditions, 141932 events. 106034/141932 cut-off events. For 187340/197699 co-relation queries the response was YES. Maximal size of possible extension queue 6732. Compared 1017249 event pairs, 63648 based on Foata normal form. 8573/75020 useless extension candidates. Maximal degree in co-relation 340150. Up to 140506 conditions per place. [2023-08-30 06:42:30,652 INFO L137 encePairwiseOnDemand]: 423/426 looper letters, 104 selfloop transitions, 11 changer transitions 0/126 dead transitions. [2023-08-30 06:42:30,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 126 transitions, 1319 flow [2023-08-30 06:42:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:42:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:42:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 734 transitions. [2023-08-30 06:42:30,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307511737089202 [2023-08-30 06:42:30,654 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 734 transitions. [2023-08-30 06:42:30,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 734 transitions. [2023-08-30 06:42:30,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:42:30,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 734 transitions. [2023-08-30 06:42:30,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:30,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:30,657 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:30,657 INFO L175 Difference]: Start difference. First operand has 148 places, 132 transitions, 1179 flow. Second operand 4 states and 734 transitions. [2023-08-30 06:42:30,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 126 transitions, 1319 flow [2023-08-30 06:42:30,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 126 transitions, 1232 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-30 06:42:30,993 INFO L231 Difference]: Finished difference. Result has 141 places, 126 transitions, 1024 flow [2023-08-30 06:42:30,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1024, PETRI_PLACES=141, PETRI_TRANSITIONS=126} [2023-08-30 06:42:30,994 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 79 predicate places. [2023-08-30 06:42:30,994 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 126 transitions, 1024 flow [2023-08-30 06:42:30,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:30,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:42:30,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:42:31,003 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 [2023-08-30 06:42:31,194 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 [2023-08-30 06:42:31,195 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-08-30 06:42:31,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:42:31,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1720903426, now seen corresponding path program 1 times [2023-08-30 06:42:31,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:42:31,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428867428] [2023-08-30 06:42:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:42:31,196 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 [2023-08-30 06:42:31,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:42:31,199 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) [2023-08-30 06:42:31,200 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 [2023-08-30 06:42:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:42:31,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:42:31,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:42:31,388 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 06:42:31,388 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 [2023-08-30 06:42:31,423 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 06:42:31,424 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 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 06:42:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 06:42:31,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:42:31,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:42:31,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428867428] [2023-08-30 06:42:31,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428867428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:42:31,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:42:31,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:42:31,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043513954] [2023-08-30 06:42:31,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:42:31,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:42:31,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:42:31,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:42:31,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:42:31,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 426 [2023-08-30 06:42:31,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 126 transitions, 1024 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:42:31,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:42:31,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 426 [2023-08-30 06:42:31,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand