./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.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/parallel-parallel-sum-2.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 c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 --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 05:56:25,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:56:25,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:56:25,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:56:25,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:56:25,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:56:25,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:56:25,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:56:25,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:56:25,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:56:25,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:56:25,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:56:25,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:56:25,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:56:25,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:56:25,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:56:25,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:56:25,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:56:25,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:56:25,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:56:25,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:56:25,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:56:25,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:56:25,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:56:25,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:56:25,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:56:25,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:56:25,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:56:25,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:56:25,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:56:25,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:56:25,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:56:25,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:56:25,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:56:25,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:56:25,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:56:25,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:56:25,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:56:25,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:56:25,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:56:25,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:56:25,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 05:56:25,851 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:56:25,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:56:25,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:56:25,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:56:25,852 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:56:25,853 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:56:25,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:56:25,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:56:25,854 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:56:25,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:56:25,854 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:56:25,854 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:56:25,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:56:25,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:56:25,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:56:25,855 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:56:25,855 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:56:25,856 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:56:25,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:56:25,856 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:56:25,856 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:56:25,856 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:56:25,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:56:25,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:56:25,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:56:25,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:56:25,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:56:25,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:56:25,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 05:56:25,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 05:56:25,858 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:56:25,859 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:56:25,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:56:25,859 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:56:25,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:56:26,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:56:26,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:56:26,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:56:26,207 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:56:26,207 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:56:26,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-08-30 05:56:27,389 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:56:27,588 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:56:27,588 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-08-30 05:56:27,594 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65cf8df23/3de218f908f54c6f9b6795c9c798f25c/FLAG9b51298ce [2023-08-30 05:56:27,968 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65cf8df23/3de218f908f54c6f9b6795c9c798f25c [2023-08-30 05:56:27,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:56:27,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:56:27,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:56:27,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:56:27,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:56:27,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:56:27" (1/1) ... [2023-08-30 05:56:27,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577573f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:27, skipping insertion in model container [2023-08-30 05:56:27,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:56:27" (1/1) ... [2023-08-30 05:56:27,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:56:28,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:56:28,171 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-08-30 05:56:28,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:56:28,190 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 05:56:28,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9f8fc29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:28, skipping insertion in model container [2023-08-30 05:56:28,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:56:28,191 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 05:56:28,192 INFO L158 Benchmark]: Toolchain (without parser) took 220.30ms. Allocated memory is still 77.6MB. Free memory was 46.9MB in the beginning and 54.0MB in the end (delta: -7.1MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2023-08-30 05:56:28,193 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory was 34.1MB in the beginning and 34.0MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 05:56:28,193 INFO L158 Benchmark]: CACSL2BoogieTranslator took 218.48ms. Allocated memory is still 77.6MB. Free memory was 46.6MB in the beginning and 54.0MB in the end (delta: -7.5MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. [2023-08-30 05:56:28,195 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 was 34.1MB in the beginning and 34.0MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 218.48ms. Allocated memory is still 77.6MB. Free memory was 46.6MB in the beginning and 54.0MB in the end (delta: -7.5MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 175]: 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/parallel-parallel-sum-2.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 c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 --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 05:56:29,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:56:29,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:56:29,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:56:29,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:56:29,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:56:29,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:56:29,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:56:29,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:56:29,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:56:29,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:56:29,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:56:29,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:56:29,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:56:29,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:56:29,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:56:29,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:56:29,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:56:29,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:56:29,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:56:29,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:56:29,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:56:29,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:56:29,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:56:29,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:56:29,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:56:29,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:56:29,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:56:29,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:56:29,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:56:29,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:56:29,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:56:29,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:56:29,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:56:29,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:56:29,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:56:29,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:56:29,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:56:29,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:56:29,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:56:29,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:56:29,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 05:56:30,017 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:56:30,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:56:30,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:56:30,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:56:30,019 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:56:30,019 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:56:30,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:56:30,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:56:30,020 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:56:30,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:56:30,022 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:56:30,022 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:56:30,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:56:30,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:56:30,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:56:30,022 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:56:30,023 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:56:30,023 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:56:30,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:56:30,023 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:56:30,023 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 05:56:30,024 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 05:56:30,024 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:56:30,024 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:56:30,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:56:30,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:56:30,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:56:30,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:56:30,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:56:30,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:56:30,025 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 05:56:30,026 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 05:56:30,026 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:56:30,026 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:56:30,026 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:56:30,027 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 05:56:30,027 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:56:30,027 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b350b5c7953744a22c8334b20c4dc8efdff09f1ecb36de8b1744d1e20f0260 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:56:30,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:56:30,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:56:30,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:56:30,359 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:56:30,360 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:56:30,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-08-30 05:56:31,450 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:56:31,675 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:56:31,676 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-08-30 05:56:31,687 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df65236be/8f44c39600244daa810a52325c5f006c/FLAG1aa970260 [2023-08-30 05:56:31,699 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df65236be/8f44c39600244daa810a52325c5f006c [2023-08-30 05:56:31,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:56:31,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:56:31,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:56:31,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:56:31,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:56:31,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:56:31" (1/1) ... [2023-08-30 05:56:31,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eabd119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:31, skipping insertion in model container [2023-08-30 05:56:31,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:56:31" (1/1) ... [2023-08-30 05:56:31,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:56:31,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:56:31,884 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-08-30 05:56:31,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:56:31,908 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 05:56:31,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:56:31,929 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-08-30 05:56:31,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:56:31,938 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 05:56:31,960 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-08-30 05:56:31,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:56:31,974 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 05:56:31,975 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 05:56:31,980 INFO L208 MainTranslator]: Completed translation [2023-08-30 05:56:31,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:31 WrapperNode [2023-08-30 05:56:31,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:56:31,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 05:56:31,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 05:56:31,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 05:56:31,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:31" (1/1) ... [2023-08-30 05:56:31,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:31" (1/1) ... [2023-08-30 05:56:32,028 INFO L138 Inliner]: procedures = 31, calls = 88, calls flagged for inlining = 22, calls inlined = 32, statements flattened = 384 [2023-08-30 05:56:32,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 05:56:32,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 05:56:32,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 05:56:32,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 05:56:32,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:31" (1/1) ... [2023-08-30 05:56:32,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:31" (1/1) ... [2023-08-30 05:56:32,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:31" (1/1) ... [2023-08-30 05:56:32,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:31" (1/1) ... [2023-08-30 05:56:32,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:31" (1/1) ... [2023-08-30 05:56:32,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:31" (1/1) ... [2023-08-30 05:56:32,063 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:31" (1/1) ... [2023-08-30 05:56:32,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:31" (1/1) ... [2023-08-30 05:56:32,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 05:56:32,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 05:56:32,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 05:56:32,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 05:56:32,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:31" (1/1) ... [2023-08-30 05:56:32,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:56:32,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:56:32,111 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 05:56:32,128 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 05:56:32,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 05:56:32,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 05:56:32,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 05:56:32,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 05:56:32,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 05:56:32,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 05:56:32,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 05:56:32,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 05:56:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 05:56:32,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 05:56:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 05:56:32,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 05:56:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-30 05:56:32,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-30 05:56:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-30 05:56:32,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-30 05:56:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 05:56:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 05:56:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 05:56:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 05:56:32,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 05:56:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 05:56:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 05:56:32,159 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 05:56:32,413 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 05:56:32,418 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 05:56:33,140 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 05:56:33,373 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 05:56:33,373 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 05:56:33,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:56:33 BoogieIcfgContainer [2023-08-30 05:56:33,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 05:56:33,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 05:56:33,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 05:56:33,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 05:56:33,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:56:31" (1/3) ... [2023-08-30 05:56:33,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a7228d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:56:33, skipping insertion in model container [2023-08-30 05:56:33,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:56:31" (2/3) ... [2023-08-30 05:56:33,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a7228d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:56:33, skipping insertion in model container [2023-08-30 05:56:33,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:56:33" (3/3) ... [2023-08-30 05:56:33,387 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-2.wvr.c [2023-08-30 05:56:33,404 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 05:56:33,404 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-08-30 05:56:33,404 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 05:56:33,579 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-30 05:56:33,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 339 transitions, 750 flow [2023-08-30 05:56:33,761 INFO L130 PetriNetUnfolder]: 21/291 cut-off events. [2023-08-30 05:56:33,762 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:56:33,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 291 events. 21/291 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 488 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 244. Up to 3 conditions per place. [2023-08-30 05:56:33,771 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 339 transitions, 750 flow [2023-08-30 05:56:33,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 285 places, 287 transitions, 622 flow [2023-08-30 05:56:33,788 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 05:56:33,800 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 285 places, 287 transitions, 622 flow [2023-08-30 05:56:33,804 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 285 places, 287 transitions, 622 flow [2023-08-30 05:56:33,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 287 transitions, 622 flow [2023-08-30 05:56:33,880 INFO L130 PetriNetUnfolder]: 21/287 cut-off events. [2023-08-30 05:56:33,880 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:56:33,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 287 events. 21/287 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 483 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 244. Up to 3 conditions per place. [2023-08-30 05:56:33,892 INFO L119 LiptonReduction]: Number of co-enabled transitions 14104 [2023-08-30 05:56:55,392 INFO L134 LiptonReduction]: Checked pairs total: 54760 [2023-08-30 05:56:55,392 INFO L136 LiptonReduction]: Total number of compositions: 264 [2023-08-30 05:56:55,403 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 05:56:55,408 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;@52dcb7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 05:56:55,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2023-08-30 05:56:55,411 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 05:56:55,411 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:56:55,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:56:55,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:56:55,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:56:55,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:56:55,421 INFO L85 PathProgramCache]: Analyzing trace with hash 48378, now seen corresponding path program 1 times [2023-08-30 05:56:55,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:56:55,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486037707] [2023-08-30 05:56:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:56:55,432 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 05:56:55,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:56:55,439 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 05:56:55,449 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 05:56:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:56:55,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:56:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:56:55,784 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:56:55,785 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:56:55,821 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 05:56:55,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:56:55,822 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:56:55,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486037707] [2023-08-30 05:56:55,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486037707] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:56:55,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:56:55,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:56:55,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677275299] [2023-08-30 05:56:55,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:56:55,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:56:55,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:56:55,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:56:55,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:56:56,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 607 [2023-08-30 05:56:56,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 96 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 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 05:56:56,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:56:56,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 607 [2023-08-30 05:56:56,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:57:10,613 INFO L130 PetriNetUnfolder]: 132970/172130 cut-off events. [2023-08-30 05:57:10,613 INFO L131 PetriNetUnfolder]: For 12616/12616 co-relation queries the response was YES. [2023-08-30 05:57:11,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346008 conditions, 172130 events. 132970/172130 cut-off events. For 12616/12616 co-relation queries the response was YES. Maximal size of possible extension queue 6624. Compared 986401 event pairs, 105827 based on Foata normal form. 0/58464 useless extension candidates. Maximal degree in co-relation 343421. Up to 160367 conditions per place. [2023-08-30 05:57:11,832 INFO L137 encePairwiseOnDemand]: 601/607 looper letters, 72 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2023-08-30 05:57:11,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 422 flow [2023-08-30 05:57:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:57:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:57:11,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 900 transitions. [2023-08-30 05:57:11,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942339373970346 [2023-08-30 05:57:11,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 900 transitions. [2023-08-30 05:57:11,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 900 transitions. [2023-08-30 05:57:11,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:57:11,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 900 transitions. [2023-08-30 05:57:11,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 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 05:57:11,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:57:11,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:57:11,872 INFO L175 Difference]: Start difference. First operand has 106 places, 96 transitions, 240 flow. Second operand 3 states and 900 transitions. [2023-08-30 05:57:11,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 422 flow [2023-08-30 05:57:12,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 386 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-30 05:57:12,312 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 232 flow [2023-08-30 05:57:12,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2023-08-30 05:57:12,317 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -10 predicate places. [2023-08-30 05:57:12,317 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 232 flow [2023-08-30 05:57:12,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 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 05:57:12,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:57:12,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:57:12,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-30 05:57:12,528 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 05:57:12,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:57:12,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:57:12,529 INFO L85 PathProgramCache]: Analyzing trace with hash 48377, now seen corresponding path program 1 times [2023-08-30 05:57:12,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:57:12,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374658265] [2023-08-30 05:57:12,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:57:12,530 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 05:57:12,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:57:12,531 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 05:57:12,535 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 05:57:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:57:12,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 05:57:12,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:57:12,653 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:57:12,654 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:57:12,667 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 05:57:12,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:57:12,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:57:12,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374658265] [2023-08-30 05:57:12,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374658265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:57:12,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:57:12,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:57:12,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431307541] [2023-08-30 05:57:12,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:57:12,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:57:12,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:57:12,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:57:12,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:57:12,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 607 [2023-08-30 05:57:12,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 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 05:57:12,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:57:12,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 607 [2023-08-30 05:57:12,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:57:24,610 INFO L130 PetriNetUnfolder]: 129376/167015 cut-off events. [2023-08-30 05:57:24,611 INFO L131 PetriNetUnfolder]: For 2896/2896 co-relation queries the response was YES. [2023-08-30 05:57:24,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326152 conditions, 167015 events. 129376/167015 cut-off events. For 2896/2896 co-relation queries the response was YES. Maximal size of possible extension queue 6624. Compared 955800 event pairs, 99066 based on Foata normal form. 0/55804 useless extension candidates. Maximal degree in co-relation 323786. Up to 149066 conditions per place. [2023-08-30 05:57:25,543 INFO L137 encePairwiseOnDemand]: 603/607 looper letters, 99 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2023-08-30 05:57:25,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 140 transitions, 533 flow [2023-08-30 05:57:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:57:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:57:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 912 transitions. [2023-08-30 05:57:25,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500823723228995 [2023-08-30 05:57:25,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 912 transitions. [2023-08-30 05:57:25,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 912 transitions. [2023-08-30 05:57:25,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:57:25,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 912 transitions. [2023-08-30 05:57:25,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:57:25,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:57:25,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:57:25,554 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 232 flow. Second operand 3 states and 912 transitions. [2023-08-30 05:57:25,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 140 transitions, 533 flow [2023-08-30 05:57:25,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 140 transitions, 529 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:57:25,558 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 243 flow [2023-08-30 05:57:25,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=243, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2023-08-30 05:57:25,560 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -9 predicate places. [2023-08-30 05:57:25,560 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 243 flow [2023-08-30 05:57:25,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 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 05:57:25,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:57:25,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:57:25,573 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 (3)] Ended with exit code 0 [2023-08-30 05:57:25,769 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 05:57:25,769 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:57:25,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:57:25,772 INFO L85 PathProgramCache]: Analyzing trace with hash 48469, now seen corresponding path program 1 times [2023-08-30 05:57:25,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:57:25,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286281864] [2023-08-30 05:57:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:57:25,773 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 05:57:25,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:57:25,774 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 05:57:25,777 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 05:57:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:57:25,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:57:25,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:57:25,903 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 05:57:25,904 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 3 case distinctions, treesize of input 22 treesize of output 29 [2023-08-30 05:57:25,944 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 05:57:25,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:57:25,945 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:57:25,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286281864] [2023-08-30 05:57:25,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286281864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:57:25,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:57:25,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:57:25,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364379998] [2023-08-30 05:57:25,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:57:25,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:57:25,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:57:25,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:57:25,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:57:26,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 607 [2023-08-30 05:57:26,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 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 05:57:26,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:57:26,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 607 [2023-08-30 05:57:26,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:57:35,301 INFO L130 PetriNetUnfolder]: 96720/125415 cut-off events. [2023-08-30 05:57:35,301 INFO L131 PetriNetUnfolder]: For 2685/2685 co-relation queries the response was YES. [2023-08-30 05:57:35,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245912 conditions, 125415 events. 96720/125415 cut-off events. For 2685/2685 co-relation queries the response was YES. Maximal size of possible extension queue 5018. Compared 702286 event pairs, 73008 based on Foata normal form. 0/44096 useless extension candidates. Maximal degree in co-relation 240389. Up to 110403 conditions per place. [2023-08-30 05:57:35,941 INFO L137 encePairwiseOnDemand]: 602/607 looper letters, 97 selfloop transitions, 3 changer transitions 0/138 dead transitions. [2023-08-30 05:57:35,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 138 transitions, 534 flow [2023-08-30 05:57:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:57:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:57:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 911 transitions. [2023-08-30 05:57:35,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500274574409665 [2023-08-30 05:57:35,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 911 transitions. [2023-08-30 05:57:35,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 911 transitions. [2023-08-30 05:57:35,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:57:35,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 911 transitions. [2023-08-30 05:57:35,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 0 states have call successors, (0), 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 05:57:35,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:57:35,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:57:35,958 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 243 flow. Second operand 3 states and 911 transitions. [2023-08-30 05:57:35,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 138 transitions, 534 flow [2023-08-30 05:57:35,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 138 transitions, 531 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:57:35,968 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 249 flow [2023-08-30 05:57:35,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2023-08-30 05:57:35,974 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -8 predicate places. [2023-08-30 05:57:35,975 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 249 flow [2023-08-30 05:57:35,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 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 05:57:35,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:57:35,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 05:57:35,987 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 05:57:36,184 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 05:57:36,185 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:57:36,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:57:36,185 INFO L85 PathProgramCache]: Analyzing trace with hash 48468, now seen corresponding path program 1 times [2023-08-30 05:57:36,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:57:36,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629592258] [2023-08-30 05:57:36,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:57:36,186 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 05:57:36,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:57:36,187 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 05:57:36,188 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 05:57:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:57:36,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 05:57:36,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:57:36,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:57:36,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:57:36,321 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 05:57:36,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 05:57:36,336 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 10 treesize of output 8 [2023-08-30 05:57:36,387 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 05:57:36,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:57:36,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:57:36,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629592258] [2023-08-30 05:57:36,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629592258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:57:36,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:57:36,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:57:36,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545215706] [2023-08-30 05:57:36,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:57:36,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:57:36,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:57:36,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:57:36,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:57:36,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 607 [2023-08-30 05:57:36,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 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 05:57:36,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:57:36,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 607 [2023-08-30 05:57:36,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:57:42,462 INFO L130 PetriNetUnfolder]: 63071/82538 cut-off events. [2023-08-30 05:57:42,462 INFO L131 PetriNetUnfolder]: For 2665/2665 co-relation queries the response was YES. [2023-08-30 05:57:42,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162417 conditions, 82538 events. 63071/82538 cut-off events. For 2665/2665 co-relation queries the response was YES. Maximal size of possible extension queue 3408. Compared 450562 event pairs, 49781 based on Foata normal form. 0/32294 useless extension candidates. Maximal degree in co-relation 158362. Up to 76835 conditions per place. [2023-08-30 05:57:42,876 INFO L137 encePairwiseOnDemand]: 604/607 looper letters, 57 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2023-08-30 05:57:42,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 96 transitions, 361 flow [2023-08-30 05:57:42,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:57:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:57:42,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2023-08-30 05:57:42,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48929159802306427 [2023-08-30 05:57:42,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2023-08-30 05:57:42,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2023-08-30 05:57:42,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:57:42,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2023-08-30 05:57:42,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 0 states have call successors, (0), 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 05:57:42,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:57:42,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:57:42,886 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 249 flow. Second operand 3 states and 891 transitions. [2023-08-30 05:57:42,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 96 transitions, 361 flow [2023-08-30 05:57:42,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 96 transitions, 355 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:57:42,897 INFO L231 Difference]: Finished difference. Result has 96 places, 96 transitions, 241 flow [2023-08-30 05:57:42,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=96, PETRI_TRANSITIONS=96} [2023-08-30 05:57:42,898 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -10 predicate places. [2023-08-30 05:57:42,898 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 96 transitions, 241 flow [2023-08-30 05:57:42,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 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 05:57:42,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:57:42,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:57:42,911 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 05:57:43,107 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 05:57:43,108 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:57:43,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:57:43,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1502991, now seen corresponding path program 1 times [2023-08-30 05:57:43,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:57:43,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900495508] [2023-08-30 05:57:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:57:43,109 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 05:57:43,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:57:43,111 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 05:57:43,113 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 05:57:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:57:43,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:57:43,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:57:43,247 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:57:43,247 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:57:43,305 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 05:57:43,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:57:43,501 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 05:57:43,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:57:43,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900495508] [2023-08-30 05:57:43,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900495508] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:57:43,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:57:43,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 05:57:43,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615277182] [2023-08-30 05:57:43,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:57:43,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:57:43,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:57:43,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:57:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:57:44,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 607 [2023-08-30 05:57:44,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 96 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 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 05:57:44,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:57:44,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 607 [2023-08-30 05:57:44,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:57:51,025 INFO L130 PetriNetUnfolder]: 64778/84987 cut-off events. [2023-08-30 05:57:51,025 INFO L131 PetriNetUnfolder]: For 2394/2394 co-relation queries the response was YES. [2023-08-30 05:57:51,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167185 conditions, 84987 events. 64778/84987 cut-off events. For 2394/2394 co-relation queries the response was YES. Maximal size of possible extension queue 3408. Compared 463977 event pairs, 50654 based on Foata normal form. 0/33788 useless extension candidates. Maximal degree in co-relation 167174. Up to 79037 conditions per place. [2023-08-30 05:57:51,664 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 76 selfloop transitions, 17 changer transitions 0/125 dead transitions. [2023-08-30 05:57:51,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 125 transitions, 509 flow [2023-08-30 05:57:51,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:57:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:57:51,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1708 transitions. [2023-08-30 05:57:51,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46897309170785284 [2023-08-30 05:57:51,669 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1708 transitions. [2023-08-30 05:57:51,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1708 transitions. [2023-08-30 05:57:51,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:57:51,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1708 transitions. [2023-08-30 05:57:51,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 284.6666666666667) internal successors, (1708), 6 states have internal predecessors, (1708), 0 states have call successors, (0), 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 05:57:51,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 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 05:57:51,683 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 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 05:57:51,684 INFO L175 Difference]: Start difference. First operand has 96 places, 96 transitions, 241 flow. Second operand 6 states and 1708 transitions. [2023-08-30 05:57:51,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 125 transitions, 509 flow [2023-08-30 05:57:51,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 125 transitions, 508 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:57:51,690 INFO L231 Difference]: Finished difference. Result has 104 places, 109 transitions, 368 flow [2023-08-30 05:57:51,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=368, PETRI_PLACES=104, PETRI_TRANSITIONS=109} [2023-08-30 05:57:51,691 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -2 predicate places. [2023-08-30 05:57:51,691 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 109 transitions, 368 flow [2023-08-30 05:57:51,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 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 05:57:51,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:57:51,693 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 05:57:51,702 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 05:57:51,901 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 05:57:51,902 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:57:51,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:57:51,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1829182010, now seen corresponding path program 2 times [2023-08-30 05:57:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:57:51,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256663090] [2023-08-30 05:57:51,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:57:51,903 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 05:57:51,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:57:51,904 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 05:57:51,905 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 05:57:51,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:57:51,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:57:52,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 05:57:52,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:57:52,068 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:57:52,068 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:57:52,224 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 05:57:52,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:57:52,817 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 05:57:52,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:57:52,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256663090] [2023-08-30 05:57:52,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256663090] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:57:52,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:57:52,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 05:57:52,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662004235] [2023-08-30 05:57:52,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:57:52,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 05:57:52,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:57:52,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 05:57:52,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 05:57:57,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 607 [2023-08-30 05:57:57,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 109 transitions, 368 flow. Second operand has 12 states, 12 states have (on average 271.0) internal successors, (3252), 12 states have internal predecessors, (3252), 0 states have call successors, (0), 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 05:57:57,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:57:57,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 607 [2023-08-30 05:57:57,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:58:07,039 INFO L130 PetriNetUnfolder]: 64827/85125 cut-off events. [2023-08-30 05:58:07,039 INFO L131 PetriNetUnfolder]: For 3701/3701 co-relation queries the response was YES. [2023-08-30 05:58:07,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168344 conditions, 85125 events. 64827/85125 cut-off events. For 3701/3701 co-relation queries the response was YES. Maximal size of possible extension queue 3408. Compared 465065 event pairs, 44016 based on Foata normal form. 6/33910 useless extension candidates. Maximal degree in co-relation 168328. Up to 79065 conditions per place. [2023-08-30 05:58:07,533 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 114 selfloop transitions, 40 changer transitions 0/186 dead transitions. [2023-08-30 05:58:07,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 186 transitions, 1003 flow [2023-08-30 05:58:07,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 05:58:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 05:58:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3938 transitions. [2023-08-30 05:58:07,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634031536832196 [2023-08-30 05:58:07,542 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3938 transitions. [2023-08-30 05:58:07,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3938 transitions. [2023-08-30 05:58:07,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:58:07,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3938 transitions. [2023-08-30 05:58:07,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 281.2857142857143) internal successors, (3938), 14 states have internal predecessors, (3938), 0 states have call successors, (0), 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 05:58:07,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 607.0) internal successors, (9105), 15 states have internal predecessors, (9105), 0 states have call successors, (0), 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 05:58:07,564 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 607.0) internal successors, (9105), 15 states have internal predecessors, (9105), 0 states have call successors, (0), 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 05:58:07,565 INFO L175 Difference]: Start difference. First operand has 104 places, 109 transitions, 368 flow. Second operand 14 states and 3938 transitions. [2023-08-30 05:58:07,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 186 transitions, 1003 flow [2023-08-30 05:58:07,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 186 transitions, 953 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-08-30 05:58:07,574 INFO L231 Difference]: Finished difference. Result has 124 places, 134 transitions, 654 flow [2023-08-30 05:58:07,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=654, PETRI_PLACES=124, PETRI_TRANSITIONS=134} [2023-08-30 05:58:07,575 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 18 predicate places. [2023-08-30 05:58:07,576 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 134 transitions, 654 flow [2023-08-30 05:58:07,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 271.0) internal successors, (3252), 12 states have internal predecessors, (3252), 0 states have call successors, (0), 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 05:58:07,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:58:07,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 05:58:07,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 05:58:07,786 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 05:58:07,787 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:58:07,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:58:07,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1847298388, now seen corresponding path program 1 times [2023-08-30 05:58:07,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:58:07,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130663940] [2023-08-30 05:58:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:58:07,788 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 05:58:07,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:58:07,789 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 05:58:07,794 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 05:58:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:58:07,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:58:07,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:58:07,913 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-08-30 05:58:07,913 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 2 case distinctions, treesize of input 12 treesize of output 22 [2023-08-30 05:58:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:58:07,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:58:07,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:58:07,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130663940] [2023-08-30 05:58:07,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130663940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:58:07,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:58:07,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:58:07,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571054457] [2023-08-30 05:58:07,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:58:07,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:58:07,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:58:07,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:58:07,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:58:08,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 607 [2023-08-30 05:58:08,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 134 transitions, 654 flow. Second operand has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 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 05:58:08,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:58:08,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 607 [2023-08-30 05:58:08,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:58:14,654 INFO L130 PetriNetUnfolder]: 65465/86111 cut-off events. [2023-08-30 05:58:14,654 INFO L131 PetriNetUnfolder]: For 2455/2457 co-relation queries the response was YES. [2023-08-30 05:58:14,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169440 conditions, 86111 events. 65465/86111 cut-off events. For 2455/2457 co-relation queries the response was YES. Maximal size of possible extension queue 3414. Compared 472393 event pairs, 48560 based on Foata normal form. 1/34109 useless extension candidates. Maximal degree in co-relation 169415. Up to 75070 conditions per place. [2023-08-30 05:58:15,264 INFO L137 encePairwiseOnDemand]: 598/607 looper letters, 113 selfloop transitions, 8 changer transitions 0/183 dead transitions. [2023-08-30 05:58:15,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 183 transitions, 1013 flow [2023-08-30 05:58:15,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:58:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:58:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 910 transitions. [2023-08-30 05:58:15,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.499725425590335 [2023-08-30 05:58:15,266 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 910 transitions. [2023-08-30 05:58:15,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 910 transitions. [2023-08-30 05:58:15,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:58:15,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 910 transitions. [2023-08-30 05:58:15,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 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 05:58:15,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:58:15,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:58:15,272 INFO L175 Difference]: Start difference. First operand has 124 places, 134 transitions, 654 flow. Second operand 3 states and 910 transitions. [2023-08-30 05:58:15,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 183 transitions, 1013 flow [2023-08-30 05:58:15,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 183 transitions, 981 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-30 05:58:15,280 INFO L231 Difference]: Finished difference. Result has 126 places, 139 transitions, 680 flow [2023-08-30 05:58:15,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=680, PETRI_PLACES=126, PETRI_TRANSITIONS=139} [2023-08-30 05:58:15,281 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 20 predicate places. [2023-08-30 05:58:15,282 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 139 transitions, 680 flow [2023-08-30 05:58:15,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 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 05:58:15,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:58:15,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 05:58:15,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 05:58:15,491 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 05:58:15,491 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:58:15,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:58:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1847298389, now seen corresponding path program 1 times [2023-08-30 05:58:15,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:58:15,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113419347] [2023-08-30 05:58:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:58:15,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:58:15,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:58:15,494 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 05:58:15,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 05:58:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:58:15,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 05:58:15,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:58:15,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:58:15,599 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-30 05:58:15,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-30 05:58:15,617 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 39 treesize of output 37 [2023-08-30 05:58:15,645 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 05:58:15,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:58:15,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:58:15,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113419347] [2023-08-30 05:58:15,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113419347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:58:15,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:58:15,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:58:15,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423717504] [2023-08-30 05:58:15,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:58:15,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:58:15,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:58:15,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:58:15,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:58:15,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 607 [2023-08-30 05:58:15,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 139 transitions, 680 flow. Second operand has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 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 05:58:15,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:58:15,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 607 [2023-08-30 05:58:15,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:58:22,551 INFO L130 PetriNetUnfolder]: 64841/85226 cut-off events. [2023-08-30 05:58:22,551 INFO L131 PetriNetUnfolder]: For 5216/5222 co-relation queries the response was YES. [2023-08-30 05:58:22,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169617 conditions, 85226 events. 64841/85226 cut-off events. For 5216/5222 co-relation queries the response was YES. Maximal size of possible extension queue 3413. Compared 468250 event pairs, 50886 based on Foata normal form. 248/34137 useless extension candidates. Maximal degree in co-relation 169589. Up to 79263 conditions per place. [2023-08-30 05:58:23,235 INFO L137 encePairwiseOnDemand]: 604/607 looper letters, 72 selfloop transitions, 1 changer transitions 0/137 dead transitions. [2023-08-30 05:58:23,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 137 transitions, 822 flow [2023-08-30 05:58:23,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:58:23,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:58:23,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 890 transitions. [2023-08-30 05:58:23,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4887424492037342 [2023-08-30 05:58:23,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 890 transitions. [2023-08-30 05:58:23,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 890 transitions. [2023-08-30 05:58:23,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:58:23,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 890 transitions. [2023-08-30 05:58:23,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 0 states have call successors, (0), 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 05:58:23,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:58:23,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:58:23,243 INFO L175 Difference]: Start difference. First operand has 126 places, 139 transitions, 680 flow. Second operand 3 states and 890 transitions. [2023-08-30 05:58:23,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 137 transitions, 822 flow [2023-08-30 05:58:23,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 137 transitions, 806 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:58:23,261 INFO L231 Difference]: Finished difference. Result has 124 places, 137 transitions, 662 flow [2023-08-30 05:58:23,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=662, PETRI_PLACES=124, PETRI_TRANSITIONS=137} [2023-08-30 05:58:23,262 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 18 predicate places. [2023-08-30 05:58:23,262 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 137 transitions, 662 flow [2023-08-30 05:58:23,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 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 05:58:23,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:58:23,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:58:23,274 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 05:58:23,472 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 05:58:23,473 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:58:23,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:58:23,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1170462127, now seen corresponding path program 1 times [2023-08-30 05:58:23,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:58:23,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149297310] [2023-08-30 05:58:23,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:58:23,474 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 05:58:23,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:58:23,475 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 05:58:23,477 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 05:58:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:58:23,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 05:58:23,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:58:23,568 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 05:58:23,585 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 05:58:23,585 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 05:58:23,597 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 05:58:23,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:58:23,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:58:23,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149297310] [2023-08-30 05:58:23,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149297310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:58:23,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:58:23,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:58:23,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883035434] [2023-08-30 05:58:23,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:58:23,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:58:23,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:58:23,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:58:23,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:58:23,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 607 [2023-08-30 05:58:23,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 137 transitions, 662 flow. Second operand has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 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 05:58:23,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:58:23,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 607 [2023-08-30 05:58:23,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:58:29,398 INFO L130 PetriNetUnfolder]: 53592/71286 cut-off events. [2023-08-30 05:58:29,398 INFO L131 PetriNetUnfolder]: For 5236/5240 co-relation queries the response was YES. [2023-08-30 05:58:29,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142570 conditions, 71286 events. 53592/71286 cut-off events. For 5236/5240 co-relation queries the response was YES. Maximal size of possible extension queue 2576. Compared 391924 event pairs, 35084 based on Foata normal form. 0/30194 useless extension candidates. Maximal degree in co-relation 142542. Up to 58421 conditions per place. [2023-08-30 05:58:30,138 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 112 selfloop transitions, 19 changer transitions 0/180 dead transitions. [2023-08-30 05:58:30,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 180 transitions, 1034 flow [2023-08-30 05:58:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:58:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:58:30,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-08-30 05:58:30,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975288303130148 [2023-08-30 05:58:30,140 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-08-30 05:58:30,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-08-30 05:58:30,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:58:30,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-08-30 05:58:30,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 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 05:58:30,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:58:30,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:58:30,144 INFO L175 Difference]: Start difference. First operand has 124 places, 137 transitions, 662 flow. Second operand 3 states and 906 transitions. [2023-08-30 05:58:30,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 180 transitions, 1034 flow [2023-08-30 05:58:30,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 180 transitions, 1033 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:58:30,153 INFO L231 Difference]: Finished difference. Result has 127 places, 142 transitions, 770 flow [2023-08-30 05:58:30,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=770, PETRI_PLACES=127, PETRI_TRANSITIONS=142} [2023-08-30 05:58:30,154 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 21 predicate places. [2023-08-30 05:58:30,154 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 142 transitions, 770 flow [2023-08-30 05:58:30,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 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 05:58:30,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:58:30,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:58:30,164 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 05:58:30,364 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 05:58:30,364 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:58:30,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:58:30,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1170462128, now seen corresponding path program 1 times [2023-08-30 05:58:30,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:58:30,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532084755] [2023-08-30 05:58:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:58:30,365 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 05:58:30,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:58:30,367 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 05:58:30,369 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 05:58:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:58:30,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 05:58:30,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:58:30,454 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 5 [2023-08-30 05:58:30,474 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 05:58:30,475 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 12 treesize of output 14 [2023-08-30 05:58:30,488 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 05:58:30,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:58:30,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:58:30,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532084755] [2023-08-30 05:58:30,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532084755] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:58:30,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:58:30,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:58:30,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893642012] [2023-08-30 05:58:30,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:58:30,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:58:30,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:58:30,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:58:30,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:58:30,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 607 [2023-08-30 05:58:30,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 142 transitions, 770 flow. Second operand has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 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 05:58:30,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:58:30,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 607 [2023-08-30 05:58:30,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:58:34,976 INFO L130 PetriNetUnfolder]: 39663/53555 cut-off events. [2023-08-30 05:58:34,976 INFO L131 PetriNetUnfolder]: For 11848/11848 co-relation queries the response was YES. [2023-08-30 05:58:35,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112133 conditions, 53555 events. 39663/53555 cut-off events. For 11848/11848 co-relation queries the response was YES. Maximal size of possible extension queue 1726. Compared 293806 event pairs, 29791 based on Foata normal form. 2922/27474 useless extension candidates. Maximal degree in co-relation 112104. Up to 45471 conditions per place. [2023-08-30 05:58:35,448 INFO L137 encePairwiseOnDemand]: 603/607 looper letters, 99 selfloop transitions, 15 changer transitions 0/165 dead transitions. [2023-08-30 05:58:35,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 165 transitions, 1065 flow [2023-08-30 05:58:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:58:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:58:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 917 transitions. [2023-08-30 05:58:35,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035694673256452 [2023-08-30 05:58:35,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 917 transitions. [2023-08-30 05:58:35,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 917 transitions. [2023-08-30 05:58:35,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:58:35,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 917 transitions. [2023-08-30 05:58:35,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 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 05:58:35,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:58:35,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:58:35,454 INFO L175 Difference]: Start difference. First operand has 127 places, 142 transitions, 770 flow. Second operand 3 states and 917 transitions. [2023-08-30 05:58:35,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 165 transitions, 1065 flow [2023-08-30 05:58:35,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 165 transitions, 1027 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:58:35,475 INFO L231 Difference]: Finished difference. Result has 125 places, 140 transitions, 758 flow [2023-08-30 05:58:35,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=758, PETRI_PLACES=125, PETRI_TRANSITIONS=140} [2023-08-30 05:58:35,476 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 19 predicate places. [2023-08-30 05:58:35,476 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 140 transitions, 758 flow [2023-08-30 05:58:35,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 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 05:58:35,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:58:35,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:58:35,486 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 05:58:35,682 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 05:58:35,683 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:58:35,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:58:35,683 INFO L85 PathProgramCache]: Analyzing trace with hash -467289919, now seen corresponding path program 1 times [2023-08-30 05:58:35,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:58:35,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736486827] [2023-08-30 05:58:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:58:35,684 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 05:58:35,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:58:35,685 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 05:58:35,686 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 05:58:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:58:35,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:58:35,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:58:36,111 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 05:58:36,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:58:36,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:58:36,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736486827] [2023-08-30 05:58:36,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736486827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:58:36,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:58:36,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:58:36,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243055910] [2023-08-30 05:58:36,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:58:36,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:58:36,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:58:36,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:58:36,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:58:36,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 607 [2023-08-30 05:58:36,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 140 transitions, 758 flow. Second operand has 4 states, 4 states have (on average 279.25) internal successors, (1117), 4 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:36,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:58:36,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 607 [2023-08-30 05:58:36,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:58:42,011 INFO L130 PetriNetUnfolder]: 49896/67216 cut-off events. [2023-08-30 05:58:42,012 INFO L131 PetriNetUnfolder]: For 10959/10966 co-relation queries the response was YES. [2023-08-30 05:58:42,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139796 conditions, 67216 events. 49896/67216 cut-off events. For 10959/10966 co-relation queries the response was YES. Maximal size of possible extension queue 2087. Compared 378566 event pairs, 38655 based on Foata normal form. 122/32321 useless extension candidates. Maximal degree in co-relation 139767. Up to 48823 conditions per place. [2023-08-30 05:58:42,542 INFO L137 encePairwiseOnDemand]: 597/607 looper letters, 113 selfloop transitions, 3 changer transitions 0/180 dead transitions. [2023-08-30 05:58:42,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 180 transitions, 1118 flow [2023-08-30 05:58:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:58:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:58:42,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1210 transitions. [2023-08-30 05:58:42,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49835255354200986 [2023-08-30 05:58:42,545 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1210 transitions. [2023-08-30 05:58:42,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1210 transitions. [2023-08-30 05:58:42,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:58:42,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1210 transitions. [2023-08-30 05:58:42,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 302.5) internal successors, (1210), 4 states have internal predecessors, (1210), 0 states have call successors, (0), 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 05:58:42,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 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 05:58:42,550 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 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 05:58:42,550 INFO L175 Difference]: Start difference. First operand has 125 places, 140 transitions, 758 flow. Second operand 4 states and 1210 transitions. [2023-08-30 05:58:42,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 180 transitions, 1118 flow [2023-08-30 05:58:42,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 180 transitions, 1088 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:58:42,560 INFO L231 Difference]: Finished difference. Result has 128 places, 141 transitions, 764 flow [2023-08-30 05:58:42,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=764, PETRI_PLACES=128, PETRI_TRANSITIONS=141} [2023-08-30 05:58:42,560 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 22 predicate places. [2023-08-30 05:58:42,561 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 141 transitions, 764 flow [2023-08-30 05:58:42,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 279.25) internal successors, (1117), 4 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:42,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:58:42,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:58:42,571 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 05:58:42,771 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 05:58:42,771 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:58:42,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:58:42,771 INFO L85 PathProgramCache]: Analyzing trace with hash -175700522, now seen corresponding path program 1 times [2023-08-30 05:58:42,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:58:42,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093960181] [2023-08-30 05:58:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:58:42,772 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 05:58:42,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:58:42,773 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 05:58:42,776 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 05:58:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:58:42,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 05:58:42,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:58:43,046 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 05:58:43,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:58:43,167 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 05:58:43,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:58:43,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093960181] [2023-08-30 05:58:43,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093960181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:58:43,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:58:43,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 05:58:43,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888988288] [2023-08-30 05:58:43,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:58:43,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:58:43,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:58:43,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:58:43,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:58:43,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 607 [2023-08-30 05:58:43,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 141 transitions, 764 flow. Second operand has 8 states, 8 states have (on average 275.5) internal successors, (2204), 8 states have internal predecessors, (2204), 0 states have call successors, (0), 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 05:58:43,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:58:43,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 607 [2023-08-30 05:58:43,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:58:51,523 INFO L130 PetriNetUnfolder]: 64257/87523 cut-off events. [2023-08-30 05:58:51,524 INFO L131 PetriNetUnfolder]: For 18900/18909 co-relation queries the response was YES. [2023-08-30 05:58:51,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192278 conditions, 87523 events. 64257/87523 cut-off events. For 18900/18909 co-relation queries the response was YES. Maximal size of possible extension queue 2402. Compared 520945 event pairs, 48344 based on Foata normal form. 1894/48764 useless extension candidates. Maximal degree in co-relation 192246. Up to 43781 conditions per place. [2023-08-30 05:58:52,279 INFO L137 encePairwiseOnDemand]: 596/607 looper letters, 180 selfloop transitions, 13 changer transitions 0/257 dead transitions. [2023-08-30 05:58:52,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 257 transitions, 1532 flow [2023-08-30 05:58:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:58:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:58:52,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2632 transitions. [2023-08-30 05:58:52,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48178656415888704 [2023-08-30 05:58:52,284 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2632 transitions. [2023-08-30 05:58:52,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2632 transitions. [2023-08-30 05:58:52,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:58:52,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2632 transitions. [2023-08-30 05:58:52,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 292.44444444444446) internal successors, (2632), 9 states have internal predecessors, (2632), 0 states have call successors, (0), 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 05:58:52,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 607.0) internal successors, (6070), 10 states have internal predecessors, (6070), 0 states have call successors, (0), 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 05:58:52,293 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 607.0) internal successors, (6070), 10 states have internal predecessors, (6070), 0 states have call successors, (0), 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 05:58:52,293 INFO L175 Difference]: Start difference. First operand has 128 places, 141 transitions, 764 flow. Second operand 9 states and 2632 transitions. [2023-08-30 05:58:52,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 257 transitions, 1532 flow [2023-08-30 05:58:52,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 257 transitions, 1524 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 05:58:52,317 INFO L231 Difference]: Finished difference. Result has 137 places, 145 transitions, 843 flow [2023-08-30 05:58:52,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=843, PETRI_PLACES=137, PETRI_TRANSITIONS=145} [2023-08-30 05:58:52,318 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 31 predicate places. [2023-08-30 05:58:52,318 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 145 transitions, 843 flow [2023-08-30 05:58:52,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 275.5) internal successors, (2204), 8 states have internal predecessors, (2204), 0 states have call successors, (0), 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 05:58:52,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:58:52,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:58:52,331 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 05:58:52,528 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 05:58:52,528 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:58:52,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:58:52,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1905922592, now seen corresponding path program 1 times [2023-08-30 05:58:52,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:58:52,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804273025] [2023-08-30 05:58:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:58:52,529 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 05:58:52,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:58:52,530 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 05:58:52,531 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 05:58:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:58:52,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 05:58:52,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:58:52,632 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 5 [2023-08-30 05:58:52,663 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 05:58:52,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:58:52,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:58:52,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804273025] [2023-08-30 05:58:52,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804273025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:58:52,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:58:52,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:58:52,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936343919] [2023-08-30 05:58:52,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:58:52,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:58:52,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:58:52,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:58:52,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:58:52,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 607 [2023-08-30 05:58:52,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 145 transitions, 843 flow. Second operand has 3 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 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 05:58:52,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:58:52,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 607 [2023-08-30 05:58:52,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:59:00,637 INFO L130 PetriNetUnfolder]: 65047/88660 cut-off events. [2023-08-30 05:59:00,638 INFO L131 PetriNetUnfolder]: For 27175/27189 co-relation queries the response was YES. [2023-08-30 05:59:01,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206257 conditions, 88660 events. 65047/88660 cut-off events. For 27175/27189 co-relation queries the response was YES. Maximal size of possible extension queue 2345. Compared 528657 event pairs, 49577 based on Foata normal form. 2701/50664 useless extension candidates. Maximal degree in co-relation 206222. Up to 72517 conditions per place. [2023-08-30 05:59:01,618 INFO L137 encePairwiseOnDemand]: 603/607 looper letters, 106 selfloop transitions, 5 changer transitions 0/170 dead transitions. [2023-08-30 05:59:01,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 170 transitions, 1147 flow [2023-08-30 05:59:01,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:59:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:59:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 917 transitions. [2023-08-30 05:59:01,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035694673256452 [2023-08-30 05:59:01,621 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 917 transitions. [2023-08-30 05:59:01,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 917 transitions. [2023-08-30 05:59:01,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:59:01,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 917 transitions. [2023-08-30 05:59:01,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 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 05:59:01,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:59:01,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:59:01,625 INFO L175 Difference]: Start difference. First operand has 137 places, 145 transitions, 843 flow. Second operand 3 states and 917 transitions. [2023-08-30 05:59:01,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 170 transitions, 1147 flow [2023-08-30 05:59:01,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 170 transitions, 1125 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 05:59:01,659 INFO L231 Difference]: Finished difference. Result has 134 places, 143 transitions, 827 flow [2023-08-30 05:59:01,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=827, PETRI_PLACES=134, PETRI_TRANSITIONS=143} [2023-08-30 05:59:01,660 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 28 predicate places. [2023-08-30 05:59:01,660 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 143 transitions, 827 flow [2023-08-30 05:59:01,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 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 05:59:01,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:59:01,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:59:01,672 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 (14)] Ended with exit code 0 [2023-08-30 05:59:01,870 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 05:59:01,871 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:59:01,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:59:01,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1905922591, now seen corresponding path program 1 times [2023-08-30 05:59:01,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:59:01,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501154612] [2023-08-30 05:59:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:59:01,871 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 05:59:01,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:59:01,873 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 05:59:01,874 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 05:59:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:59:01,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 05:59:01,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:59:01,969 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 05:59:01,983 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 05:59:01,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:59:01,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:59:01,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501154612] [2023-08-30 05:59:01,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501154612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:59:01,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:59:01,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:59:01,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983812405] [2023-08-30 05:59:01,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:59:01,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:59:01,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:59:01,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:59:01,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:59:02,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 607 [2023-08-30 05:59:02,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 143 transitions, 827 flow. Second operand has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 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 05:59:02,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:59:02,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 607 [2023-08-30 05:59:02,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:59:10,822 INFO L130 PetriNetUnfolder]: 77023/105269 cut-off events. [2023-08-30 05:59:10,822 INFO L131 PetriNetUnfolder]: For 34559/34581 co-relation queries the response was YES. [2023-08-30 05:59:11,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244777 conditions, 105269 events. 77023/105269 cut-off events. For 34559/34581 co-relation queries the response was YES. Maximal size of possible extension queue 2663. Compared 645724 event pairs, 50102 based on Foata normal form. 9/58771 useless extension candidates. Maximal degree in co-relation 244744. Up to 80058 conditions per place. [2023-08-30 05:59:11,925 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 120 selfloop transitions, 14 changer transitions 0/189 dead transitions. [2023-08-30 05:59:11,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 189 transitions, 1262 flow [2023-08-30 05:59:11,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:59:11,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:59:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2023-08-30 05:59:11,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986271279516749 [2023-08-30 05:59:11,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2023-08-30 05:59:11,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2023-08-30 05:59:11,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:59:11,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2023-08-30 05:59:11,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 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 05:59:11,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:59:11,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 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 05:59:11,931 INFO L175 Difference]: Start difference. First operand has 134 places, 143 transitions, 827 flow. Second operand 3 states and 908 transitions. [2023-08-30 05:59:11,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 189 transitions, 1262 flow [2023-08-30 05:59:11,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 189 transitions, 1252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:59:11,993 INFO L231 Difference]: Finished difference. Result has 136 places, 150 transitions, 937 flow [2023-08-30 05:59:11,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=937, PETRI_PLACES=136, PETRI_TRANSITIONS=150} [2023-08-30 05:59:11,994 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 30 predicate places. [2023-08-30 05:59:11,994 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 150 transitions, 937 flow [2023-08-30 05:59:11,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 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 05:59:11,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:59:11,995 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:59:12,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 05:59:12,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:59:12,205 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:59:12,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:59:12,205 INFO L85 PathProgramCache]: Analyzing trace with hash 273636192, now seen corresponding path program 1 times [2023-08-30 05:59:12,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:59:12,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846383402] [2023-08-30 05:59:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:59:12,206 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 05:59:12,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:59:12,207 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:59:12,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 05:59:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:59:12,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:59:12,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:59:12,374 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:59:12,375 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:59:12,409 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 05:59:12,409 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 05:59:12,430 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 05:59:12,431 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 05:59:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:59:12,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:59:12,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:59:12,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846383402] [2023-08-30 05:59:12,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846383402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:59:12,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:59:12,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:59:12,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250245779] [2023-08-30 05:59:12,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:59:12,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:59:12,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:59:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:59:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:59:12,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 607 [2023-08-30 05:59:12,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 150 transitions, 937 flow. Second operand has 4 states, 4 states have (on average 269.5) internal successors, (1078), 4 states have internal predecessors, (1078), 0 states have call successors, (0), 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 05:59:12,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:59:12,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 607 [2023-08-30 05:59:12,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:59:18,452 INFO L130 PetriNetUnfolder]: 45092/64243 cut-off events. [2023-08-30 05:59:18,452 INFO L131 PetriNetUnfolder]: For 33957/33962 co-relation queries the response was YES. [2023-08-30 05:59:18,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153720 conditions, 64243 events. 45092/64243 cut-off events. For 33957/33962 co-relation queries the response was YES. Maximal size of possible extension queue 1755. Compared 403512 event pairs, 22390 based on Foata normal form. 0/39007 useless extension candidates. Maximal degree in co-relation 153686. Up to 31405 conditions per place. [2023-08-30 05:59:19,191 INFO L137 encePairwiseOnDemand]: 593/607 looper letters, 139 selfloop transitions, 27 changer transitions 0/230 dead transitions. [2023-08-30 05:59:19,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 230 transitions, 1578 flow [2023-08-30 05:59:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:59:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:59:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1474 transitions. [2023-08-30 05:59:19,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485667215815486 [2023-08-30 05:59:19,194 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1474 transitions. [2023-08-30 05:59:19,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1474 transitions. [2023-08-30 05:59:19,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:59:19,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1474 transitions. [2023-08-30 05:59:19,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.8) internal successors, (1474), 5 states have internal predecessors, (1474), 0 states have call successors, (0), 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 05:59:19,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 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 05:59:19,199 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 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 05:59:19,199 INFO L175 Difference]: Start difference. First operand has 136 places, 150 transitions, 937 flow. Second operand 5 states and 1474 transitions. [2023-08-30 05:59:19,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 230 transitions, 1578 flow [2023-08-30 05:59:19,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 230 transitions, 1542 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:59:19,235 INFO L231 Difference]: Finished difference. Result has 141 places, 165 transitions, 1163 flow [2023-08-30 05:59:19,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1163, PETRI_PLACES=141, PETRI_TRANSITIONS=165} [2023-08-30 05:59:19,236 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 35 predicate places. [2023-08-30 05:59:19,236 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 165 transitions, 1163 flow [2023-08-30 05:59:19,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 269.5) internal successors, (1078), 4 states have internal predecessors, (1078), 0 states have call successors, (0), 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 05:59:19,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:59:19,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:59:19,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 05:59:19,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:59:19,447 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:59:19,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:59:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash 273636193, now seen corresponding path program 2 times [2023-08-30 05:59:19,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:59:19,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538600516] [2023-08-30 05:59:19,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:59:19,448 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 05:59:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:59:19,450 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:59:19,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 05:59:19,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:59:19,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:59:19,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 05:59:19,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:59:19,655 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2023-08-30 05:59:19,656 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 2 case distinctions, treesize of input 16 treesize of output 31 [2023-08-30 05:59:19,712 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 05:59:19,713 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 05:59:19,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:59:19,925 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 16 treesize of output 18 [2023-08-30 05:59:19,944 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:59:19,945 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 05:59:19,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:59:19,988 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 16 treesize of output 18 [2023-08-30 05:59:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 05:59:20,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:59:20,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:59:20,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538600516] [2023-08-30 05:59:20,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538600516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:59:20,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:59:20,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:59:20,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763957365] [2023-08-30 05:59:20,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:59:20,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:59:20,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:59:20,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:59:20,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:59:21,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 607 [2023-08-30 05:59:21,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 165 transitions, 1163 flow. Second operand has 6 states, 6 states have (on average 260.3333333333333) internal successors, (1562), 6 states have internal predecessors, (1562), 0 states have call successors, (0), 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 05:59:21,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:59:21,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 607 [2023-08-30 05:59:21,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:59:30,538 INFO L130 PetriNetUnfolder]: 60539/84592 cut-off events. [2023-08-30 05:59:30,539 INFO L131 PetriNetUnfolder]: For 89707/90009 co-relation queries the response was YES. [2023-08-30 05:59:31,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230260 conditions, 84592 events. 60539/84592 cut-off events. For 89707/90009 co-relation queries the response was YES. Maximal size of possible extension queue 2234. Compared 530552 event pairs, 20680 based on Foata normal form. 1404/65923 useless extension candidates. Maximal degree in co-relation 230222. Up to 24701 conditions per place. [2023-08-30 05:59:31,323 INFO L137 encePairwiseOnDemand]: 592/607 looper letters, 243 selfloop transitions, 46 changer transitions 0/321 dead transitions. [2023-08-30 05:59:31,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 321 transitions, 2413 flow [2023-08-30 05:59:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 05:59:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 05:59:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2021 transitions. [2023-08-30 05:59:31,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47564132737114617 [2023-08-30 05:59:31,328 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2021 transitions. [2023-08-30 05:59:31,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2021 transitions. [2023-08-30 05:59:31,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:59:31,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2021 transitions. [2023-08-30 05:59:31,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 288.7142857142857) internal successors, (2021), 7 states have internal predecessors, (2021), 0 states have call successors, (0), 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 05:59:31,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 607.0) internal successors, (4856), 8 states have internal predecessors, (4856), 0 states have call successors, (0), 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 05:59:31,336 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 607.0) internal successors, (4856), 8 states have internal predecessors, (4856), 0 states have call successors, (0), 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 05:59:31,336 INFO L175 Difference]: Start difference. First operand has 141 places, 165 transitions, 1163 flow. Second operand 7 states and 2021 transitions. [2023-08-30 05:59:31,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 321 transitions, 2413 flow [2023-08-30 05:59:31,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 321 transitions, 2384 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-30 05:59:31,399 INFO L231 Difference]: Finished difference. Result has 148 places, 179 transitions, 1445 flow [2023-08-30 05:59:31,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1445, PETRI_PLACES=148, PETRI_TRANSITIONS=179} [2023-08-30 05:59:31,399 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 42 predicate places. [2023-08-30 05:59:31,399 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 179 transitions, 1445 flow [2023-08-30 05:59:31,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 260.3333333333333) internal successors, (1562), 6 states have internal predecessors, (1562), 0 states have call successors, (0), 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 05:59:31,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:59:31,400 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 05:59:31,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 05:59:31,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:59:31,605 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 05:59:31,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:59:31,605 INFO L85 PathProgramCache]: Analyzing trace with hash 893811226, now seen corresponding path program 3 times [2023-08-30 05:59:31,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:59:31,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825741636] [2023-08-30 05:59:31,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:59:31,606 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 05:59:31,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:59:31,607 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:59:31,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 05:59:31,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 05:59:31,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:59:31,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 05:59:31,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:59:31,868 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 05:59:31,868 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 05:59:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:59:32,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:59:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:59:34,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:59:34,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825741636] [2023-08-30 05:59:34,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825741636] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:59:34,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:59:34,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 05:59:34,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473512571] [2023-08-30 05:59:34,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:59:34,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 05:59:34,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:59:34,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 05:59:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 05:59:51,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 607 [2023-08-30 05:59:51,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 179 transitions, 1445 flow. Second operand has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 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 05:59:51,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:59:51,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 607 [2023-08-30 05:59:51,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:00:22,002 INFO L130 PetriNetUnfolder]: 60608/85908 cut-off events. [2023-08-30 06:00:22,003 INFO L131 PetriNetUnfolder]: For 151209/151327 co-relation queries the response was YES. [2023-08-30 06:00:22,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248873 conditions, 85908 events. 60608/85908 cut-off events. For 151209/151327 co-relation queries the response was YES. Maximal size of possible extension queue 2208. Compared 555893 event pairs, 41564 based on Foata normal form. 12/65124 useless extension candidates. Maximal degree in co-relation 248832. Up to 78979 conditions per place. [2023-08-30 06:00:22,967 INFO L137 encePairwiseOnDemand]: 599/607 looper letters, 217 selfloop transitions, 80 changer transitions 0/329 dead transitions. [2023-08-30 06:00:22,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 329 transitions, 3013 flow [2023-08-30 06:00:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 06:00:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 06:00:22,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 7278 transitions. [2023-08-30 06:00:22,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46115828158661765 [2023-08-30 06:00:22,978 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 7278 transitions. [2023-08-30 06:00:22,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 7278 transitions. [2023-08-30 06:00:22,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:00:22,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 7278 transitions. [2023-08-30 06:00:22,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 279.9230769230769) internal successors, (7278), 26 states have internal predecessors, (7278), 0 states have call successors, (0), 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 06:00:22,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 607.0) internal successors, (16389), 27 states have internal predecessors, (16389), 0 states have call successors, (0), 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 06:00:23,000 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 607.0) internal successors, (16389), 27 states have internal predecessors, (16389), 0 states have call successors, (0), 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 06:00:23,000 INFO L175 Difference]: Start difference. First operand has 148 places, 179 transitions, 1445 flow. Second operand 26 states and 7278 transitions. [2023-08-30 06:00:23,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 329 transitions, 3013 flow [2023-08-30 06:00:23,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 329 transitions, 3006 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:00:23,740 INFO L231 Difference]: Finished difference. Result has 186 places, 220 transitions, 2229 flow [2023-08-30 06:00:23,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2229, PETRI_PLACES=186, PETRI_TRANSITIONS=220} [2023-08-30 06:00:23,741 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 80 predicate places. [2023-08-30 06:00:23,741 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 220 transitions, 2229 flow [2023-08-30 06:00:23,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 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 06:00:23,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:00:23,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:00:23,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:00:23,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:00:23,953 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 06:00:23,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:00:23,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1114389204, now seen corresponding path program 1 times [2023-08-30 06:00:23,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:00:23,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012932679] [2023-08-30 06:00:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:00:23,954 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 06:00:23,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:00:23,955 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:00:23,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 06:00:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:00:24,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 06:00:24,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:00:24,076 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 06:00:24,082 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 5 [2023-08-30 06:00:24,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:00:24,109 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 12 treesize of output 14 [2023-08-30 06:00:24,122 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:00:24,122 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 06:00:24,136 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 06:00:24,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:00:24,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:00:24,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012932679] [2023-08-30 06:00:24,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012932679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:00:24,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:00:24,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 06:00:24,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439381658] [2023-08-30 06:00:24,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:00:24,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:00:24,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:00:24,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:00:24,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:00:24,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 607 [2023-08-30 06:00:24,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 220 transitions, 2229 flow. Second operand has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 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 06:00:24,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:00:24,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 607 [2023-08-30 06:00:24,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:00:32,507 INFO L130 PetriNetUnfolder]: 46156/70087 cut-off events. [2023-08-30 06:00:32,507 INFO L131 PetriNetUnfolder]: For 125540/125666 co-relation queries the response was YES. [2023-08-30 06:00:33,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202768 conditions, 70087 events. 46156/70087 cut-off events. For 125540/125666 co-relation queries the response was YES. Maximal size of possible extension queue 2132. Compared 508806 event pairs, 13866 based on Foata normal form. 6/56076 useless extension candidates. Maximal degree in co-relation 202712. Up to 37512 conditions per place. [2023-08-30 06:00:33,521 INFO L137 encePairwiseOnDemand]: 597/607 looper letters, 164 selfloop transitions, 53 changer transitions 0/280 dead transitions. [2023-08-30 06:00:33,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 280 transitions, 3040 flow [2023-08-30 06:00:33,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:00:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:00:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1166 transitions. [2023-08-30 06:00:33,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802306425041186 [2023-08-30 06:00:33,524 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1166 transitions. [2023-08-30 06:00:33,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1166 transitions. [2023-08-30 06:00:33,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:00:33,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1166 transitions. [2023-08-30 06:00:33,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.5) internal successors, (1166), 4 states have internal predecessors, (1166), 0 states have call successors, (0), 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 06:00:33,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 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 06:00:33,527 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 607.0) internal successors, (3035), 5 states have internal predecessors, (3035), 0 states have call successors, (0), 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 06:00:33,527 INFO L175 Difference]: Start difference. First operand has 186 places, 220 transitions, 2229 flow. Second operand 4 states and 1166 transitions. [2023-08-30 06:00:33,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 280 transitions, 3040 flow [2023-08-30 06:00:34,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 280 transitions, 2952 flow, removed 23 selfloop flow, removed 10 redundant places. [2023-08-30 06:00:34,004 INFO L231 Difference]: Finished difference. Result has 179 places, 233 transitions, 2492 flow [2023-08-30 06:00:34,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2492, PETRI_PLACES=179, PETRI_TRANSITIONS=233} [2023-08-30 06:00:34,005 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 73 predicate places. [2023-08-30 06:00:34,005 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 233 transitions, 2492 flow [2023-08-30 06:00:34,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 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 06:00:34,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:00:34,005 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:00:34,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-08-30 06:00:34,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:00:34,206 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 06:00:34,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:00:34,206 INFO L85 PathProgramCache]: Analyzing trace with hash -107211231, now seen corresponding path program 1 times [2023-08-30 06:00:34,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:00:34,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465948925] [2023-08-30 06:00:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:00:34,207 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 06:00:34,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:00:34,209 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:00:34,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 06:00:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:00:34,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:00:34,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:00:34,406 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:00:34,406 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 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:00:34,482 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 13 treesize of output 9 [2023-08-30 06:00:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:00:34,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:00:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:00:34,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:00:34,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465948925] [2023-08-30 06:00:34,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465948925] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:00:34,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:00:34,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:00:34,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638636453] [2023-08-30 06:00:34,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:00:34,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:00:34,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:00:34,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:00:34,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:00:37,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 607 [2023-08-30 06:00:37,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 233 transitions, 2492 flow. Second operand has 12 states, 12 states have (on average 266.6666666666667) internal successors, (3200), 12 states have internal predecessors, (3200), 0 states have call successors, (0), 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 06:00:37,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:00:37,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 607 [2023-08-30 06:00:37,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:00:51,224 INFO L130 PetriNetUnfolder]: 63587/94949 cut-off events. [2023-08-30 06:00:51,225 INFO L131 PetriNetUnfolder]: For 220876/221408 co-relation queries the response was YES. [2023-08-30 06:00:52,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290697 conditions, 94949 events. 63587/94949 cut-off events. For 220876/221408 co-relation queries the response was YES. Maximal size of possible extension queue 2908. Compared 694763 event pairs, 32584 based on Foata normal form. 3003/80408 useless extension candidates. Maximal degree in co-relation 290639. Up to 23584 conditions per place. [2023-08-30 06:00:52,903 INFO L137 encePairwiseOnDemand]: 592/607 looper letters, 398 selfloop transitions, 36 changer transitions 0/466 dead transitions. [2023-08-30 06:00:52,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 466 transitions, 4907 flow [2023-08-30 06:00:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 06:00:52,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 06:00:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3682 transitions. [2023-08-30 06:00:52,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666075275630465 [2023-08-30 06:00:52,907 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3682 transitions. [2023-08-30 06:00:52,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3682 transitions. [2023-08-30 06:00:52,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:00:52,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3682 transitions. [2023-08-30 06:00:52,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 283.2307692307692) internal successors, (3682), 13 states have internal predecessors, (3682), 0 states have call successors, (0), 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 06:00:52,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 607.0) internal successors, (8498), 14 states have internal predecessors, (8498), 0 states have call successors, (0), 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 06:00:52,915 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 607.0) internal successors, (8498), 14 states have internal predecessors, (8498), 0 states have call successors, (0), 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 06:00:52,915 INFO L175 Difference]: Start difference. First operand has 179 places, 233 transitions, 2492 flow. Second operand 13 states and 3682 transitions. [2023-08-30 06:00:52,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 466 transitions, 4907 flow [2023-08-30 06:00:53,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 466 transitions, 4824 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 06:00:53,776 INFO L231 Difference]: Finished difference. Result has 194 places, 251 transitions, 2866 flow [2023-08-30 06:00:53,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2866, PETRI_PLACES=194, PETRI_TRANSITIONS=251} [2023-08-30 06:00:53,776 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 88 predicate places. [2023-08-30 06:00:53,777 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 251 transitions, 2866 flow [2023-08-30 06:00:53,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 266.6666666666667) internal successors, (3200), 12 states have internal predecessors, (3200), 0 states have call successors, (0), 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 06:00:53,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:00:53,777 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:00:53,785 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 (20)] Ended with exit code 0 [2023-08-30 06:00:53,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:00:53,978 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 06:00:53,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:00:53,978 INFO L85 PathProgramCache]: Analyzing trace with hash -2086325012, now seen corresponding path program 2 times [2023-08-30 06:00:53,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:00:53,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494414851] [2023-08-30 06:00:53,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:00:53,979 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 06:00:53,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:00:53,980 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:00:53,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 06:00:54,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:00:54,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:00:54,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 06:00:54,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:00:54,175 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 06:00:54,175 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 2 case distinctions, treesize of input 12 treesize of output 27 [2023-08-30 06:00:54,211 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 06:00:54,212 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 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 06:00:54,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:00:54,330 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 12 treesize of output 14 [2023-08-30 06:00:54,341 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 06:00:54,341 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 06:00:54,372 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 06:00:54,373 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 12 treesize of output 18 [2023-08-30 06:00:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:00:54,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:01:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:01:02,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:01:02,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494414851] [2023-08-30 06:01:02,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494414851] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:01:02,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:01:02,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-08-30 06:01:02,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393116004] [2023-08-30 06:01:02,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:01:02,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 06:01:02,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:01:02,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 06:01:02,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=248, Unknown=3, NotChecked=0, Total=306 [2023-08-30 06:01:05,240 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 [1] [2023-08-30 06:01:07,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:09,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:11,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:14,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:16,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:19,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:21,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:24,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 06:01:26,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:29,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:31,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:34,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:36,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:39,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:41,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:44,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:46,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:50,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:52,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:54,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:01:57,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:00,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:02,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:06,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:08,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:11,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:14,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:18,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:21,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:23,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:26,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:28,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:31,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:34,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:37,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:39,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:42,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:45,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:47,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:50,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:53,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:55,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:02:58,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:03:01,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:03:03,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:03:06,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:03:10,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:03:13,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:03:15,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:03:18,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:03:20,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:03:23,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:03:25,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:03:28,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:03:30,766 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 [1] [2023-08-30 06:03:30,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 607 [2023-08-30 06:03:30,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 251 transitions, 2866 flow. Second operand has 18 states, 18 states have (on average 201.33333333333334) internal successors, (3624), 18 states have internal predecessors, (3624), 0 states have call successors, (0), 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 06:03:30,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:03:30,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 607 [2023-08-30 06:03:30,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:04:07,076 INFO L130 PetriNetUnfolder]: 122669/171399 cut-off events. [2023-08-30 06:04:07,077 INFO L131 PetriNetUnfolder]: For 434957/435051 co-relation queries the response was YES. [2023-08-30 06:04:08,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540945 conditions, 171399 events. 122669/171399 cut-off events. For 434957/435051 co-relation queries the response was YES. Maximal size of possible extension queue 4143. Compared 1169545 event pairs, 52152 based on Foata normal form. 2019/142098 useless extension candidates. Maximal degree in co-relation 540882. Up to 54083 conditions per place. [2023-08-30 06:04:09,521 INFO L137 encePairwiseOnDemand]: 589/607 looper letters, 711 selfloop transitions, 113 changer transitions 0/835 dead transitions. [2023-08-30 06:04:09,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 835 transitions, 7493 flow [2023-08-30 06:04:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 06:04:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 06:04:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3394 transitions. [2023-08-30 06:04:09,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39938809131560365 [2023-08-30 06:04:09,526 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3394 transitions. [2023-08-30 06:04:09,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3394 transitions. [2023-08-30 06:04:09,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:04:09,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3394 transitions. [2023-08-30 06:04:09,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 242.42857142857142) internal successors, (3394), 14 states have internal predecessors, (3394), 0 states have call successors, (0), 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 06:04:09,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 607.0) internal successors, (9105), 15 states have internal predecessors, (9105), 0 states have call successors, (0), 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 06:04:09,536 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 607.0) internal successors, (9105), 15 states have internal predecessors, (9105), 0 states have call successors, (0), 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 06:04:09,536 INFO L175 Difference]: Start difference. First operand has 194 places, 251 transitions, 2866 flow. Second operand 14 states and 3394 transitions. [2023-08-30 06:04:09,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 835 transitions, 7493 flow [2023-08-30 06:04:11,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 835 transitions, 7398 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-30 06:04:11,980 INFO L231 Difference]: Finished difference. Result has 207 places, 300 transitions, 3818 flow [2023-08-30 06:04:11,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=2771, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3818, PETRI_PLACES=207, PETRI_TRANSITIONS=300} [2023-08-30 06:04:11,981 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 101 predicate places. [2023-08-30 06:04:11,982 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 300 transitions, 3818 flow [2023-08-30 06:04:11,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 201.33333333333334) internal successors, (3624), 18 states have internal predecessors, (3624), 0 states have call successors, (0), 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 06:04:11,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:04:11,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:04:11,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 06:04:12,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:04:12,191 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread5Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-08-30 06:04:12,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:04:12,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1481131628, now seen corresponding path program 1 times [2023-08-30 06:04:12,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:04:12,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878414713] [2023-08-30 06:04:12,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:04:12,192 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 06:04:12,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:04:12,192 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:04:12,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 06:04:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:04:12,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:04:12,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:04:12,487 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 06:04:12,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:04:12,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:04:12,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878414713] [2023-08-30 06:04:12,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878414713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:04:12,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:04:12,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:04:12,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942427591] [2023-08-30 06:04:12,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:04:12,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:04:12,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:04:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:04:12,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:04:12,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 607 [2023-08-30 06:04:12,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 300 transitions, 3818 flow. Second operand has 4 states, 4 states have (on average 279.75) internal successors, (1119), 4 states have internal predecessors, (1119), 0 states have call successors, (0), 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 06:04:12,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:04:12,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 607 [2023-08-30 06:04:12,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand