./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0134.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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 ../sv-benchmarks/c/memsafety/test-0134.i -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 554aa7448188134a862651a68c0992659f18748881f2b6912b6dbf17d440798c --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:15:50,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:15:50,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:15:50,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:15:50,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:15:50,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:15:50,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:15:50,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:15:50,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:15:50,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:15:50,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:15:50,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:15:50,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:15:50,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:15:50,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:15:50,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:15:50,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:15:50,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:15:50,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:15:50,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:15:50,806 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:15:50,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:15:50,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:15:50,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:15:50,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:15:50,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:15:50,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:15:50,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:15:50,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:15:50,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:15:50,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:15:50,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:15:50,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:15:50,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:15:50,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:15:50,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:15:50,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:15:50,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:15:50,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:15:50,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:15:50,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:15:50,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:15:50,825 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:15:50,859 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:15:50,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:15:50,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:15:50,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:15:50,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:15:50,861 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:15:50,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:15:50,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:15:50,862 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:15:50,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:15:50,863 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:15:50,863 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:15:50,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:15:50,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:15:50,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:15:50,864 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:15:50,864 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:15:50,864 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:15:50,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:15:50,865 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:15:50,865 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:15:50,865 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:15:50,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:15:50,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:15:50,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:15:50,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:15:50,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:15:50,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:15:50,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:15:50,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:15:50,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 554aa7448188134a862651a68c0992659f18748881f2b6912b6dbf17d440798c [2022-07-14 06:15:51,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:15:51,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:15:51,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:15:51,084 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:15:51,085 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:15:51,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0134.i [2022-07-14 06:15:51,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702d13286/b4ba3c3ab2c6452786d051e44089833c/FLAG31319e7b8 [2022-07-14 06:15:51,555 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:15:51,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0134.i [2022-07-14 06:15:51,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702d13286/b4ba3c3ab2c6452786d051e44089833c/FLAG31319e7b8 [2022-07-14 06:15:51,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702d13286/b4ba3c3ab2c6452786d051e44089833c [2022-07-14 06:15:51,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:15:51,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:15:51,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:15:51,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:15:51,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:15:51,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:15:51" (1/1) ... [2022-07-14 06:15:51,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d64b79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:51, skipping insertion in model container [2022-07-14 06:15:51,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:15:51" (1/1) ... [2022-07-14 06:15:51,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:15:51,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:15:51,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:15:51,837 ERROR L326 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) [2022-07-14 06:15:51,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@59ad12d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:51, skipping insertion in model container [2022-07-14 06:15:51,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:15:51,838 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-14 06:15:51,840 INFO L158 Benchmark]: Toolchain (without parser) took 249.67ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 49.8MB in the beginning and 78.3MB in the end (delta: -28.5MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2022-07-14 06:15:51,843 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 86.0MB. Free memory was 56.2MB in the beginning and 56.1MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:15:51,844 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.84ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 49.7MB in the beginning and 78.3MB in the end (delta: -28.7MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2022-07-14 06:15:51,846 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 86.0MB. Free memory was 56.2MB in the beginning and 56.1MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 247.84ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 49.7MB in the beginning and 78.3MB in the end (delta: -28.7MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 585]: 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 ../sv-benchmarks/c/memsafety/test-0134.i -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 554aa7448188134a862651a68c0992659f18748881f2b6912b6dbf17d440798c --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:15:53,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:15:53,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:15:53,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:15:53,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:15:53,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:15:53,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:15:53,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:15:53,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:15:53,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:15:53,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:15:53,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:15:53,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:15:53,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:15:53,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:15:53,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:15:53,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:15:53,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:15:53,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:15:53,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:15:53,493 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:15:53,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:15:53,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:15:53,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:15:53,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:15:53,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:15:53,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:15:53,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:15:53,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:15:53,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:15:53,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:15:53,508 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:15:53,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:15:53,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:15:53,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:15:53,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:15:53,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:15:53,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:15:53,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:15:53,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:15:53,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:15:53,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:15:53,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 06:15:53,551 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:15:53,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:15:53,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:15:53,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:15:53,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:15:53,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:15:53,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:15:53,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:15:53,554 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:15:53,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:15:53,555 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:15:53,555 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:15:53,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:15:53,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:15:53,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:15:53,565 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:15:53,565 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:15:53,565 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:15:53,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:15:53,566 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:15:53,566 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 06:15:53,566 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 06:15:53,566 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:15:53,566 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:15:53,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:15:53,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:15:53,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:15:53,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:15:53,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:15:53,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:15:53,568 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 06:15:53,568 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 06:15:53,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 06:15:53,569 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 554aa7448188134a862651a68c0992659f18748881f2b6912b6dbf17d440798c [2022-07-14 06:15:53,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:15:53,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:15:53,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:15:53,891 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:15:53,891 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:15:53,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0134.i [2022-07-14 06:15:53,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9d076adb/40ab6f05ad544fa4a2d2a9b45b68a238/FLAGc0bad1923 [2022-07-14 06:15:54,390 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:15:54,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0134.i [2022-07-14 06:15:54,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9d076adb/40ab6f05ad544fa4a2d2a9b45b68a238/FLAGc0bad1923 [2022-07-14 06:15:54,788 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9d076adb/40ab6f05ad544fa4a2d2a9b45b68a238 [2022-07-14 06:15:54,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:15:54,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:15:54,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:15:54,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:15:54,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:15:54,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:15:54" (1/1) ... [2022-07-14 06:15:54,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c24883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:54, skipping insertion in model container [2022-07-14 06:15:54,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:15:54" (1/1) ... [2022-07-14 06:15:54,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:15:54,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:15:55,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:15:55,068 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-14 06:15:55,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:15:55,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:15:55,133 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:15:55,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:15:55,187 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:15:55,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:55 WrapperNode [2022-07-14 06:15:55,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:15:55,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:15:55,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:15:55,189 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:15:55,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:55" (1/1) ... [2022-07-14 06:15:55,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:55" (1/1) ... [2022-07-14 06:15:55,232 INFO L137 Inliner]: procedures = 140, calls = 54, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 133 [2022-07-14 06:15:55,232 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:15:55,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:15:55,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:15:55,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:15:55,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:55" (1/1) ... [2022-07-14 06:15:55,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:55" (1/1) ... [2022-07-14 06:15:55,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:55" (1/1) ... [2022-07-14 06:15:55,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:55" (1/1) ... [2022-07-14 06:15:55,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:55" (1/1) ... [2022-07-14 06:15:55,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:55" (1/1) ... [2022-07-14 06:15:55,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:55" (1/1) ... [2022-07-14 06:15:55,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:15:55,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:15:55,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:15:55,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:15:55,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:55" (1/1) ... [2022-07-14 06:15:55,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:15:55,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:15:55,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 06:15:55,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 06:15:55,380 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-07-14 06:15:55,380 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-07-14 06:15:55,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-14 06:15:55,381 INFO L130 BoogieDeclarations]: Found specification of procedure __list_del [2022-07-14 06:15:55,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_del [2022-07-14 06:15:55,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 06:15:55,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 06:15:55,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:15:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 06:15:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 06:15:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-07-14 06:15:55,383 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-07-14 06:15:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:15:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-14 06:15:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 06:15:55,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-14 06:15:55,384 INFO L130 BoogieDeclarations]: Found specification of procedure val_from_node [2022-07-14 06:15:55,384 INFO L138 BoogieDeclarations]: Found implementation of procedure val_from_node [2022-07-14 06:15:55,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:15:55,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:15:55,539 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:15:55,540 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:15:55,986 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:15:55,993 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:15:55,994 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-14 06:15:55,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:15:55 BoogieIcfgContainer [2022-07-14 06:15:55,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:15:55,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:15:55,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:15:56,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:15:56,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:15:54" (1/3) ... [2022-07-14 06:15:56,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b29dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:15:56, skipping insertion in model container [2022-07-14 06:15:56,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:15:55" (2/3) ... [2022-07-14 06:15:56,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b29dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:15:56, skipping insertion in model container [2022-07-14 06:15:56,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:15:55" (3/3) ... [2022-07-14 06:15:56,004 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0134.i [2022-07-14 06:15:56,015 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:15:56,015 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2022-07-14 06:15:56,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:15:56,071 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=FINITE_AUTOMATA, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@48c63ccc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7cc37175 [2022-07-14 06:15:56,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2022-07-14 06:15:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 69 states have (on average 1.8695652173913044) internal successors, (129), 117 states have internal predecessors, (129), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:15:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-14 06:15:56,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:15:56,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-14 06:15:56,084 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:15:56,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:15:56,089 INFO L85 PathProgramCache]: Analyzing trace with hash 66866992, now seen corresponding path program 1 times [2022-07-14 06:15:56,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:15:56,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362714994] [2022-07-14 06:15:56,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:15:56,099 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:15:56,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:15:56,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:15:56,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 06:15:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:15:56,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-14 06:15:56,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:15:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:15:56,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:15:56,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:15:56,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362714994] [2022-07-14 06:15:56,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362714994] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:15:56,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:15:56,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:15:56,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002361988] [2022-07-14 06:15:56,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:15:56,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-14 06:15:56,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:15:56,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-14 06:15:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-14 06:15:56,229 INFO L87 Difference]: Start difference. First operand has 131 states, 69 states have (on average 1.8695652173913044) internal successors, (129), 117 states have internal predecessors, (129), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:15:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:15:56,252 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2022-07-14 06:15:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-14 06:15:56,254 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-14 06:15:56,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:15:56,259 INFO L225 Difference]: With dead ends: 131 [2022-07-14 06:15:56,260 INFO L226 Difference]: Without dead ends: 129 [2022-07-14 06:15:56,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-14 06:15:56,263 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:15:56,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:15:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-14 06:15:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-14 06:15:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 68 states have (on average 1.7941176470588236) internal successors, (122), 115 states have internal predecessors, (122), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:15:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 140 transitions. [2022-07-14 06:15:56,293 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 140 transitions. Word has length 5 [2022-07-14 06:15:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:15:56,293 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 140 transitions. [2022-07-14 06:15:56,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:15:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 140 transitions. [2022-07-14 06:15:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-14 06:15:56,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:15:56,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-14 06:15:56,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:15:56,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:15:56,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:15:56,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:15:56,511 INFO L85 PathProgramCache]: Analyzing trace with hash 66867054, now seen corresponding path program 1 times [2022-07-14 06:15:56,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:15:56,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428136646] [2022-07-14 06:15:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:15:56,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:15:56,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:15:56,513 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:15:56,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 06:15:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:15:56,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:15:56,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:15:56,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:15:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:15:56,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:15:56,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:15:56,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428136646] [2022-07-14 06:15:56,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428136646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:15:56,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:15:56,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:15:56,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835508846] [2022-07-14 06:15:56,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:15:56,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:15:56,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:15:56,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:15:56,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:15:56,615 INFO L87 Difference]: Start difference. First operand 129 states and 140 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:15:56,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:15:56,755 INFO L93 Difference]: Finished difference Result 151 states and 162 transitions. [2022-07-14 06:15:56,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:15:56,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-14 06:15:56,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:15:56,757 INFO L225 Difference]: With dead ends: 151 [2022-07-14 06:15:56,757 INFO L226 Difference]: Without dead ends: 151 [2022-07-14 06:15:56,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:15:56,758 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 75 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:15:56,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 141 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:15:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-14 06:15:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 128. [2022-07-14 06:15:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.7794117647058822) internal successors, (121), 114 states have internal predecessors, (121), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:15:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 139 transitions. [2022-07-14 06:15:56,772 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 139 transitions. Word has length 5 [2022-07-14 06:15:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:15:56,772 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 139 transitions. [2022-07-14 06:15:56,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:15:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 139 transitions. [2022-07-14 06:15:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-14 06:15:56,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:15:56,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-14 06:15:56,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:15:56,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:15:56,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:15:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:15:56,983 INFO L85 PathProgramCache]: Analyzing trace with hash 66867055, now seen corresponding path program 1 times [2022-07-14 06:15:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:15:56,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415015229] [2022-07-14 06:15:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:15:56,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:15:56,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:15:56,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:15:56,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 06:15:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:15:57,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:15:57,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:15:57,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:15:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:15:57,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:15:57,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:15:57,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415015229] [2022-07-14 06:15:57,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415015229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:15:57,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:15:57,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:15:57,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73385745] [2022-07-14 06:15:57,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:15:57,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:15:57,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:15:57,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:15:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:15:57,084 INFO L87 Difference]: Start difference. First operand 128 states and 139 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:15:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:15:57,287 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2022-07-14 06:15:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:15:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-14 06:15:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:15:57,289 INFO L225 Difference]: With dead ends: 150 [2022-07-14 06:15:57,289 INFO L226 Difference]: Without dead ends: 150 [2022-07-14 06:15:57,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:15:57,290 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 28 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:15:57,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 211 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:15:57,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-14 06:15:57,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 127. [2022-07-14 06:15:57,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 68 states have (on average 1.7647058823529411) internal successors, (120), 113 states have internal predecessors, (120), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:15:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2022-07-14 06:15:57,297 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 5 [2022-07-14 06:15:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:15:57,297 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2022-07-14 06:15:57,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:15:57,298 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2022-07-14 06:15:57,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 06:15:57,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:15:57,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:15:57,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:15:57,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:15:57,505 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:15:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:15:57,506 INFO L85 PathProgramCache]: Analyzing trace with hash -828261384, now seen corresponding path program 1 times [2022-07-14 06:15:57,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:15:57,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669184914] [2022-07-14 06:15:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:15:57,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:15:57,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:15:57,507 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:15:57,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 06:15:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:15:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:15:57,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:15:57,616 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:15:57,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 [2022-07-14 06:15:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:15:57,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:15:57,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:15:57,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669184914] [2022-07-14 06:15:57,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669184914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:15:57,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:15:57,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:15:57,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414636945] [2022-07-14 06:15:57,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:15:57,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:15:57,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:15:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:15:57,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:15:57,667 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:15:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:15:57,968 INFO L93 Difference]: Finished difference Result 165 states and 175 transitions. [2022-07-14 06:15:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:15:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-14 06:15:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:15:57,970 INFO L225 Difference]: With dead ends: 165 [2022-07-14 06:15:57,970 INFO L226 Difference]: Without dead ends: 165 [2022-07-14 06:15:57,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:15:57,971 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 179 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:15:57,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 208 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:15:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-14 06:15:57,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2022-07-14 06:15:57,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 83 states have (on average 1.783132530120482) internal successors, (148), 127 states have internal predecessors, (148), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:15:57,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 166 transitions. [2022-07-14 06:15:57,992 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 166 transitions. Word has length 8 [2022-07-14 06:15:57,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:15:57,992 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 166 transitions. [2022-07-14 06:15:57,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:15:57,993 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 166 transitions. [2022-07-14 06:15:57,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 06:15:57,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:15:57,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:15:58,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:15:58,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:15:58,194 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:15:58,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:15:58,195 INFO L85 PathProgramCache]: Analyzing trace with hash -828261383, now seen corresponding path program 1 times [2022-07-14 06:15:58,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:15:58,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852539081] [2022-07-14 06:15:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:15:58,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:15:58,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:15:58,196 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:15:58,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 06:15:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:15:58,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:15:58,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:15:58,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:15:58,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:15:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:15:58,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:15:58,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:15:58,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852539081] [2022-07-14 06:15:58,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852539081] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:15:58,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:15:58,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:15:58,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490214892] [2022-07-14 06:15:58,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:15:58,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:15:58,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:15:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:15:58,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:15:58,363 INFO L87 Difference]: Start difference. First operand 142 states and 166 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:15:58,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:15:58,736 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2022-07-14 06:15:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:15:58,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-14 06:15:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:15:58,737 INFO L225 Difference]: With dead ends: 146 [2022-07-14 06:15:58,737 INFO L226 Difference]: Without dead ends: 146 [2022-07-14 06:15:58,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:15:58,738 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 302 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:15:58,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 146 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:15:58,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-14 06:15:58,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2022-07-14 06:15:58,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 119 states have internal predecessors, (134), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-14 06:15:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 152 transitions. [2022-07-14 06:15:58,744 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 152 transitions. Word has length 8 [2022-07-14 06:15:58,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:15:58,744 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 152 transitions. [2022-07-14 06:15:58,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:15:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 152 transitions. [2022-07-14 06:15:58,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:15:58,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:15:58,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:15:58,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-14 06:15:58,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:15:58,953 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:15:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:15:58,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1390240455, now seen corresponding path program 1 times [2022-07-14 06:15:58,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:15:58,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973009315] [2022-07-14 06:15:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:15:58,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:15:58,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:15:58,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:15:58,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 06:15:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:15:59,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:15:59,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:15:59,072 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-14 06:15:59,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 14 [2022-07-14 06:15:59,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 06:15:59,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:15:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:15:59,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:15:59,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:15:59,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973009315] [2022-07-14 06:15:59,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973009315] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:15:59,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:15:59,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:15:59,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615017529] [2022-07-14 06:15:59,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:15:59,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:15:59,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:15:59,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:15:59,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:15:59,175 INFO L87 Difference]: Start difference. First operand 134 states and 152 transitions. Second operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:15:59,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:15:59,636 INFO L93 Difference]: Finished difference Result 155 states and 173 transitions. [2022-07-14 06:15:59,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:15:59,637 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-14 06:15:59,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:15:59,638 INFO L225 Difference]: With dead ends: 155 [2022-07-14 06:15:59,639 INFO L226 Difference]: Without dead ends: 155 [2022-07-14 06:15:59,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:15:59,640 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 36 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:15:59,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 656 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:15:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-14 06:15:59,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2022-07-14 06:15:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 91 states have (on average 1.6813186813186813) internal successors, (153), 132 states have internal predecessors, (153), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:15:59,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 173 transitions. [2022-07-14 06:15:59,646 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 173 transitions. Word has length 10 [2022-07-14 06:15:59,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:15:59,646 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 173 transitions. [2022-07-14 06:15:59,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:15:59,646 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 173 transitions. [2022-07-14 06:15:59,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:15:59,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:15:59,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:15:59,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-14 06:15:59,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:15:59,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting list_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:15:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:15:59,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1390240454, now seen corresponding path program 1 times [2022-07-14 06:15:59,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:15:59,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791746899] [2022-07-14 06:15:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:15:59,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:15:59,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:15:59,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:15:59,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 06:15:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:15:59,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:15:59,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:15:59,978 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:15:59,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:15:59,997 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:15:59,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 06:16:00,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 06:16:00,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 06:16:00,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:16:00,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:16:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:00,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:16:00,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791746899] [2022-07-14 06:16:00,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791746899] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:00,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:00,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:16:00,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675086097] [2022-07-14 06:16:00,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:00,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:16:00,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:00,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:16:00,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:16:00,194 INFO L87 Difference]: Start difference. First operand 148 states and 173 transitions. Second operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:00,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:00,883 INFO L93 Difference]: Finished difference Result 154 states and 172 transitions. [2022-07-14 06:16:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:16:00,885 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-14 06:16:00,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:00,886 INFO L225 Difference]: With dead ends: 154 [2022-07-14 06:16:00,886 INFO L226 Difference]: Without dead ends: 154 [2022-07-14 06:16:00,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:16:00,886 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 39 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:00,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 599 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:16:00,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-14 06:16:00,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2022-07-14 06:16:00,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 91 states have (on average 1.6703296703296704) internal successors, (152), 132 states have internal predecessors, (152), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:16:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 172 transitions. [2022-07-14 06:16:00,902 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 172 transitions. Word has length 10 [2022-07-14 06:16:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:00,902 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 172 transitions. [2022-07-14 06:16:00,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:00,903 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 172 transitions. [2022-07-14 06:16:00,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:16:00,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:00,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:00,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-14 06:16:01,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:16:01,104 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting list_addErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:01,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:01,105 INFO L85 PathProgramCache]: Analyzing trace with hash -147781147, now seen corresponding path program 1 times [2022-07-14 06:16:01,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:01,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515343807] [2022-07-14 06:16:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:01,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:01,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:01,107 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:01,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-14 06:16:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:01,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:16:01,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:01,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:01,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:16:01,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:01,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515343807] [2022-07-14 06:16:01,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515343807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:01,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:01,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:16:01,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021508330] [2022-07-14 06:16:01,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:01,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:16:01,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:01,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:16:01,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:01,197 INFO L87 Difference]: Start difference. First operand 148 states and 172 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:01,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:01,496 INFO L93 Difference]: Finished difference Result 169 states and 183 transitions. [2022-07-14 06:16:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:16:01,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 06:16:01,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:01,497 INFO L225 Difference]: With dead ends: 169 [2022-07-14 06:16:01,497 INFO L226 Difference]: Without dead ends: 169 [2022-07-14 06:16:01,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:16:01,498 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 113 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:01,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 301 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:16:01,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-14 06:16:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 147. [2022-07-14 06:16:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 91 states have (on average 1.6153846153846154) internal successors, (147), 131 states have internal predecessors, (147), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:16:01,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2022-07-14 06:16:01,502 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 11 [2022-07-14 06:16:01,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:01,502 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2022-07-14 06:16:01,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2022-07-14 06:16:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:16:01,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:01,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:01,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:01,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:16:01,704 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting list_addErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:01,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash -147781146, now seen corresponding path program 1 times [2022-07-14 06:16:01,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:01,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962756354] [2022-07-14 06:16:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:01,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:01,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:01,706 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:01,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 06:16:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:01,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:16:01,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:01,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:01,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:16:01,837 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:01,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962756354] [2022-07-14 06:16:01,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962756354] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:01,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:01,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:16:01,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79854310] [2022-07-14 06:16:01,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:01,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:16:01,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:01,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:16:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:01,839 INFO L87 Difference]: Start difference. First operand 147 states and 167 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:02,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:02,143 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2022-07-14 06:16:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:16:02,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 06:16:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:02,145 INFO L225 Difference]: With dead ends: 169 [2022-07-14 06:16:02,145 INFO L226 Difference]: Without dead ends: 169 [2022-07-14 06:16:02,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:16:02,146 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 57 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:02,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 436 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:16:02,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-14 06:16:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 147. [2022-07-14 06:16:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 91 states have (on average 1.5714285714285714) internal successors, (143), 131 states have internal predecessors, (143), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:16:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2022-07-14 06:16:02,150 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 11 [2022-07-14 06:16:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:02,150 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2022-07-14 06:16:02,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2022-07-14 06:16:02,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:16:02,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:02,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:02,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:02,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:16:02,355 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting list_addErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:02,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:02,356 INFO L85 PathProgramCache]: Analyzing trace with hash -283761464, now seen corresponding path program 1 times [2022-07-14 06:16:02,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:02,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794297443] [2022-07-14 06:16:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:02,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:02,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:02,359 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:02,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 06:16:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:02,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:16:02,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:02,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:16:02,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:02,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794297443] [2022-07-14 06:16:02,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794297443] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:02,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:02,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:16:02,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378697705] [2022-07-14 06:16:02,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:02,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:16:02,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:02,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:16:02,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:16:02,458 INFO L87 Difference]: Start difference. First operand 147 states and 163 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:02,583 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2022-07-14 06:16:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:16:02,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:16:02,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:02,585 INFO L225 Difference]: With dead ends: 146 [2022-07-14 06:16:02,585 INFO L226 Difference]: Without dead ends: 146 [2022-07-14 06:16:02,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:02,585 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 22 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:02,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 269 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-14 06:16:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-07-14 06:16:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 91 states have (on average 1.5384615384615385) internal successors, (140), 130 states have internal predecessors, (140), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:16:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 160 transitions. [2022-07-14 06:16:02,589 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 160 transitions. Word has length 13 [2022-07-14 06:16:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:02,589 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 160 transitions. [2022-07-14 06:16:02,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:02,590 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 160 transitions. [2022-07-14 06:16:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:16:02,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:02,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:02,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:02,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:16:02,797 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting list_addErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:02,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:02,798 INFO L85 PathProgramCache]: Analyzing trace with hash -283761463, now seen corresponding path program 1 times [2022-07-14 06:16:02,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:02,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837562093] [2022-07-14 06:16:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:02,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:02,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:02,799 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:02,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-14 06:16:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:02,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:16:02,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:02,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:16:02,942 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:02,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837562093] [2022-07-14 06:16:02,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837562093] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:02,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:02,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:16:02,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468910618] [2022-07-14 06:16:02,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:02,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:16:02,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:02,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:16:02,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:16:02,944 INFO L87 Difference]: Start difference. First operand 146 states and 160 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:03,242 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2022-07-14 06:16:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:16:03,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:16:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:03,244 INFO L225 Difference]: With dead ends: 148 [2022-07-14 06:16:03,244 INFO L226 Difference]: Without dead ends: 148 [2022-07-14 06:16:03,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:16:03,244 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 162 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:03,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 514 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:16:03,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-14 06:16:03,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2022-07-14 06:16:03,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 130 states have internal predecessors, (138), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:16:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 158 transitions. [2022-07-14 06:16:03,248 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 158 transitions. Word has length 13 [2022-07-14 06:16:03,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:03,248 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 158 transitions. [2022-07-14 06:16:03,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:03,248 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 158 transitions. [2022-07-14 06:16:03,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:16:03,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:03,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:03,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:03,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:16:03,449 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:03,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:03,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1628861501, now seen corresponding path program 1 times [2022-07-14 06:16:03,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:03,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150498199] [2022-07-14 06:16:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:03,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:03,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:03,451 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:03,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 06:16:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:03,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:16:03,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:03,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:16:03,574 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:03,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150498199] [2022-07-14 06:16:03,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150498199] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:03,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:03,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:16:03,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292902144] [2022-07-14 06:16:03,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:03,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:16:03,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:03,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:16:03,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:16:03,576 INFO L87 Difference]: Start difference. First operand 146 states and 158 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:03,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:03,895 INFO L93 Difference]: Finished difference Result 145 states and 157 transitions. [2022-07-14 06:16:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:16:03,895 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-07-14 06:16:03,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:03,896 INFO L225 Difference]: With dead ends: 145 [2022-07-14 06:16:03,896 INFO L226 Difference]: Without dead ends: 145 [2022-07-14 06:16:03,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:16:03,897 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 151 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:03,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 294 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:16:03,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-14 06:16:03,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-07-14 06:16:03,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 91 states have (on average 1.5054945054945055) internal successors, (137), 129 states have internal predecessors, (137), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:16:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2022-07-14 06:16:03,900 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 22 [2022-07-14 06:16:03,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:03,900 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2022-07-14 06:16:03,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:03,900 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2022-07-14 06:16:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:16:03,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:03,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:03,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:04,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:16:04,108 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting list_emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:04,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:04,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1628861500, now seen corresponding path program 1 times [2022-07-14 06:16:04,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:04,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649000252] [2022-07-14 06:16:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:04,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:04,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:04,110 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:04,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 06:16:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:04,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:16:04,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:04,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:16:04,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:04,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649000252] [2022-07-14 06:16:04,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649000252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:04,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:04,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:16:04,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930344250] [2022-07-14 06:16:04,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:04,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:16:04,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:04,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:16:04,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:16:04,317 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:04,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:04,848 INFO L93 Difference]: Finished difference Result 144 states and 156 transitions. [2022-07-14 06:16:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:16:04,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-07-14 06:16:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:04,854 INFO L225 Difference]: With dead ends: 144 [2022-07-14 06:16:04,854 INFO L226 Difference]: Without dead ends: 144 [2022-07-14 06:16:04,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:16:04,855 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 154 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:04,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 299 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:16:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-14 06:16:04,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-07-14 06:16:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 91 states have (on average 1.4945054945054945) internal successors, (136), 128 states have internal predecessors, (136), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:16:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2022-07-14 06:16:04,859 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 22 [2022-07-14 06:16:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:04,860 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2022-07-14 06:16:04,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:04,860 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2022-07-14 06:16:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:16:04,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:04,861 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:04,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:05,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:16:05,064 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:05,065 INFO L85 PathProgramCache]: Analyzing trace with hash 508658616, now seen corresponding path program 1 times [2022-07-14 06:16:05,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:05,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508274745] [2022-07-14 06:16:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:05,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:05,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:05,066 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:05,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 06:16:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:05,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-14 06:16:05,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:05,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:05,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:05,457 INFO L356 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2022-07-14 06:16:05,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 50 [2022-07-14 06:16:05,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-07-14 06:16:05,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 26 treesize of output 14 [2022-07-14 06:16:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:05,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:16:05,848 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_345 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_345) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (_ bv1 1))) is different from false [2022-07-14 06:16:05,859 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_345 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_gl_insert_~node~0#1.base_10| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_10|) (_ bv0 1))) (= (select (store |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_10| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~0#1.base_10| v_ArrVal_345) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (_ bv1 1)))) is different from false [2022-07-14 06:16:06,080 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:16:06,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 23 treesize of output 24 [2022-07-14 06:16:06,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:16:06,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-14 06:16:06,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:06,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508274745] [2022-07-14 06:16:06,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508274745] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:16:06,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [897294391] [2022-07-14 06:16:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:06,115 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:16:06,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:16:06,116 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:16:06,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-07-14 06:16:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:06,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-14 06:16:06,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:06,502 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:16:06,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 [2022-07-14 06:16:06,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:06,971 INFO L356 Elim1Store]: treesize reduction 81, result has 35.7 percent of original size [2022-07-14 06:16:06,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 39 treesize of output 70 [2022-07-14 06:16:07,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-07-14 06:16:07,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-07-14 06:16:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:07,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:16:07,490 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_gl_insert_~node~0#1.base_13| (_ BitVec 32)) (v_ArrVal_410 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_409 (_ BitVec 1))) (or (= (select (store |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_13| v_ArrVal_409) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~0#1.base_13| v_ArrVal_410) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (_ bv1 1)) (not (= (select |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_13|) (_ bv0 1))))) is different from false [2022-07-14 06:16:07,671 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:16:07,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 23 treesize of output 24 [2022-07-14 06:16:07,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:16:07,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-14 06:16:09,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [897294391] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:16:09,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:16:09,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 26 [2022-07-14 06:16:09,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611566826] [2022-07-14 06:16:09,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:16:09,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-14 06:16:09,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:09,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-14 06:16:09,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1046, Unknown=8, NotChecked=204, Total=1406 [2022-07-14 06:16:09,727 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand has 27 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:16:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:10,931 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2022-07-14 06:16:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:16:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-14 06:16:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:10,933 INFO L225 Difference]: With dead ends: 161 [2022-07-14 06:16:10,933 INFO L226 Difference]: Without dead ends: 161 [2022-07-14 06:16:10,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=298, Invalid=1686, Unknown=8, NotChecked=264, Total=2256 [2022-07-14 06:16:10,934 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 198 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 529 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:10,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 864 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 531 Invalid, 0 Unknown, 529 Unchecked, 0.6s Time] [2022-07-14 06:16:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-14 06:16:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 144. [2022-07-14 06:16:10,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 91 states have (on average 1.4835164835164836) internal successors, (135), 128 states have internal predecessors, (135), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 06:16:10,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 155 transitions. [2022-07-14 06:16:10,938 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 155 transitions. Word has length 26 [2022-07-14 06:16:10,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:10,938 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 155 transitions. [2022-07-14 06:16:10,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:16:10,939 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 155 transitions. [2022-07-14 06:16:10,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:16:10,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:10,940 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:10,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:11,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:11,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:16:11,345 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting list_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:11,345 INFO L85 PathProgramCache]: Analyzing trace with hash 508658617, now seen corresponding path program 1 times [2022-07-14 06:16:11,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:11,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879916708] [2022-07-14 06:16:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:11,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:11,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:11,347 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:11,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-14 06:16:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:11,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-14 06:16:11,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:11,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:11,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:11,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:11,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:11,888 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-14 06:16:11,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 26 [2022-07-14 06:16:11,910 INFO L356 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-07-14 06:16:11,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 27 [2022-07-14 06:16:11,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-14 06:16:11,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 06:16:12,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:16:12,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-14 06:16:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:12,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:16:12,392 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_479 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_479) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_478 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_479 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_479) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_478) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))))) is different from false [2022-07-14 06:16:15,230 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:16:15,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 41 treesize of output 32 [2022-07-14 06:16:15,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:16:15,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-14 06:16:15,247 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:16:15,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 42 treesize of output 43 [2022-07-14 06:16:15,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:16:15,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-07-14 06:16:15,262 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:16:15,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 27 treesize of output 28 [2022-07-14 06:16:15,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:16:15,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-07-14 06:16:15,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:15,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879916708] [2022-07-14 06:16:15,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879916708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:16:15,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [812676763] [2022-07-14 06:16:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:15,419 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:16:15,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:16:15,420 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:16:15,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-07-14 06:16:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:15,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 06:16:15,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:15,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:15,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:16,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:16,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:16,678 INFO L356 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-07-14 06:16:16,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 27 [2022-07-14 06:16:16,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:16:16,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-14 06:16:16,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 06:16:16,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:16:16,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-14 06:16:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:16,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:16:17,021 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_551 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_551) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_552 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_551 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_551) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_552) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))))) is different from false [2022-07-14 06:16:17,088 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_550 (_ BitVec 32)) (|v_ULTIMATE.start_gl_insert_~node~0#1.base_19| (_ BitVec 32))) (or (and (forall ((v_ArrVal_551 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19| v_ArrVal_551) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_552 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_551 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19| v_ArrVal_551) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (select (store |c_#length| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19| v_ArrVal_550) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19| v_ArrVal_552) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))))) (not (= (select |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19|) (_ bv0 1))))) is different from false [2022-07-14 06:16:17,506 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:16:17,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 41 treesize of output 32 [2022-07-14 06:16:17,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:16:17,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-14 06:16:17,525 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:16:17,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 42 treesize of output 43 [2022-07-14 06:16:17,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:16:17,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-07-14 06:16:17,547 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:16:17,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 27 treesize of output 28 [2022-07-14 06:16:17,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:16:17,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-07-14 06:16:17,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [812676763] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:16:17,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:16:17,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-14 06:16:17,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094800825] [2022-07-14 06:16:17,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:16:17,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-14 06:16:17,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:17,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-14 06:16:17,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1058, Unknown=5, NotChecked=204, Total=1406 [2022-07-14 06:16:17,770 INFO L87 Difference]: Start difference. First operand 144 states and 155 transitions. Second operand has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:16:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:18,981 INFO L93 Difference]: Finished difference Result 255 states and 277 transitions. [2022-07-14 06:16:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:16:18,981 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-14 06:16:18,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:18,982 INFO L225 Difference]: With dead ends: 255 [2022-07-14 06:16:18,982 INFO L226 Difference]: Without dead ends: 255 [2022-07-14 06:16:18,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=226, Invalid=1421, Unknown=5, NotChecked=240, Total=1892 [2022-07-14 06:16:18,983 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 363 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 924 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:18,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 993 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 711 Invalid, 0 Unknown, 924 Unchecked, 0.8s Time] [2022-07-14 06:16:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-14 06:16:18,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 178. [2022-07-14 06:16:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 118 states have (on average 1.5847457627118644) internal successors, (187), 155 states have internal predecessors, (187), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-14 06:16:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 215 transitions. [2022-07-14 06:16:18,987 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 215 transitions. Word has length 26 [2022-07-14 06:16:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:18,988 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 215 transitions. [2022-07-14 06:16:18,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:16:18,988 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 215 transitions. [2022-07-14 06:16:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 06:16:18,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:18,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:18,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:19,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:19,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:16:19,399 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:19,399 INFO L85 PathProgramCache]: Analyzing trace with hash -961621695, now seen corresponding path program 1 times [2022-07-14 06:16:19,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:19,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510739698] [2022-07-14 06:16:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:19,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:19,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:19,401 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:19,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-14 06:16:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:19,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:16:19,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:19,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:19,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:16:19,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:19,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510739698] [2022-07-14 06:16:19,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510739698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:19,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:19,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 06:16:19,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219971558] [2022-07-14 06:16:19,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:19,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:16:19,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:19,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:16:19,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:16:19,758 INFO L87 Difference]: Start difference. First operand 178 states and 215 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:16:20,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:20,400 INFO L93 Difference]: Finished difference Result 200 states and 227 transitions. [2022-07-14 06:16:20,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:16:20,401 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-07-14 06:16:20,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:20,403 INFO L225 Difference]: With dead ends: 200 [2022-07-14 06:16:20,403 INFO L226 Difference]: Without dead ends: 200 [2022-07-14 06:16:20,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:16:20,404 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 206 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:20,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 621 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:16:20,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-14 06:16:20,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 176. [2022-07-14 06:16:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 116 states have (on average 1.5862068965517242) internal successors, (184), 153 states have internal predecessors, (184), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-14 06:16:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 212 transitions. [2022-07-14 06:16:20,408 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 212 transitions. Word has length 31 [2022-07-14 06:16:20,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:20,408 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 212 transitions. [2022-07-14 06:16:20,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:16:20,408 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 212 transitions. [2022-07-14 06:16:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-14 06:16:20,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:20,408 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:20,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-07-14 06:16:20,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:16:20,609 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:20,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:20,609 INFO L85 PathProgramCache]: Analyzing trace with hash -149006513, now seen corresponding path program 1 times [2022-07-14 06:16:20,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:20,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724434603] [2022-07-14 06:16:20,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:20,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:20,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:20,611 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:20,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-14 06:16:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:20,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-14 06:16:20,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:20,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:16:21,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:16:21,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:21,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724434603] [2022-07-14 06:16:21,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724434603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:21,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:21,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 06:16:21,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752814547] [2022-07-14 06:16:21,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:21,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:16:21,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:21,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:16:21,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:16:21,042 INFO L87 Difference]: Start difference. First operand 176 states and 212 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:16:21,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:21,802 INFO L93 Difference]: Finished difference Result 200 states and 226 transitions. [2022-07-14 06:16:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:16:21,803 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-07-14 06:16:21,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:21,804 INFO L225 Difference]: With dead ends: 200 [2022-07-14 06:16:21,804 INFO L226 Difference]: Without dead ends: 200 [2022-07-14 06:16:21,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:16:21,805 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 312 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:21,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 646 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:16:21,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-14 06:16:21,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 176. [2022-07-14 06:16:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 116 states have (on average 1.5775862068965518) internal successors, (183), 153 states have internal predecessors, (183), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-14 06:16:21,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 211 transitions. [2022-07-14 06:16:21,809 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 211 transitions. Word has length 37 [2022-07-14 06:16:21,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:21,809 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 211 transitions. [2022-07-14 06:16:21,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:16:21,809 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 211 transitions. [2022-07-14 06:16:21,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-14 06:16:21,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:21,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:21,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:22,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:16:22,018 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:22,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:22,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1437435270, now seen corresponding path program 1 times [2022-07-14 06:16:22,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:22,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025947557] [2022-07-14 06:16:22,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:22,019 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:22,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:22,020 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:22,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-14 06:16:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:22,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:16:22,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:22,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:22,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:22,327 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-14 06:16:22,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2022-07-14 06:16:22,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-07-14 06:16:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-14 06:16:22,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:16:22,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:22,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025947557] [2022-07-14 06:16:22,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025947557] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:22,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:22,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 06:16:22,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979907191] [2022-07-14 06:16:22,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:22,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:16:22,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:22,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:16:22,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:16:22,405 INFO L87 Difference]: Start difference. First operand 176 states and 211 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:16:22,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:22,494 INFO L93 Difference]: Finished difference Result 183 states and 217 transitions. [2022-07-14 06:16:22,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:16:22,495 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-07-14 06:16:22,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:22,496 INFO L225 Difference]: With dead ends: 183 [2022-07-14 06:16:22,496 INFO L226 Difference]: Without dead ends: 183 [2022-07-14 06:16:22,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:16:22,497 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 36 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:22,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 287 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-07-14 06:16:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-14 06:16:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2022-07-14 06:16:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 120 states have (on average 1.5666666666666667) internal successors, (188), 157 states have internal predecessors, (188), 14 states have call successors, (14), 10 states have call predecessors, (14), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-14 06:16:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2022-07-14 06:16:22,501 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 39 [2022-07-14 06:16:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:22,501 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2022-07-14 06:16:22,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:16:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2022-07-14 06:16:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-14 06:16:22,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:22,502 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:22,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-07-14 06:16:22,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:16:22,711 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:22,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1437435269, now seen corresponding path program 1 times [2022-07-14 06:16:22,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:22,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286887526] [2022-07-14 06:16:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:22,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:22,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:22,713 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:22,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-14 06:16:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:22,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-14 06:16:22,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:22,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:22,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:23,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:23,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:23,161 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 06:16:23,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 06:16:23,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:23,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:16:23,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-14 06:16:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:23,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:16:33,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:33,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286887526] [2022-07-14 06:16:33,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286887526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:16:33,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1978634686] [2022-07-14 06:16:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:33,773 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:16:33,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:16:33,775 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:16:33,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-07-14 06:16:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:34,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-14 06:16:34,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:34,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-14 06:16:34,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:34,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:34,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:35,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:16:35,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:35,337 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:16:35,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2022-07-14 06:16:35,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:16:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:35,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:16:35,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1978634686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:16:35,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:16:35,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-07-14 06:16:35,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961940993] [2022-07-14 06:16:35,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:16:35,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-14 06:16:35,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:35,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-14 06:16:35,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=890, Unknown=3, NotChecked=0, Total=992 [2022-07-14 06:16:35,989 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 06:16:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:36,805 INFO L93 Difference]: Finished difference Result 187 states and 220 transitions. [2022-07-14 06:16:36,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:16:36,806 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-07-14 06:16:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:36,807 INFO L225 Difference]: With dead ends: 187 [2022-07-14 06:16:36,807 INFO L226 Difference]: Without dead ends: 187 [2022-07-14 06:16:36,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=157, Invalid=1322, Unknown=3, NotChecked=0, Total=1482 [2022-07-14 06:16:36,808 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 43 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:36,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 932 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 253 Unchecked, 0.3s Time] [2022-07-14 06:16:36,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-14 06:16:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-07-14 06:16:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 124 states have (on average 1.5403225806451613) internal successors, (191), 161 states have internal predecessors, (191), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-14 06:16:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 219 transitions. [2022-07-14 06:16:36,811 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 219 transitions. Word has length 39 [2022-07-14 06:16:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:36,811 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 219 transitions. [2022-07-14 06:16:36,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 06:16:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 219 transitions. [2022-07-14 06:16:36,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-14 06:16:36,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:36,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:36,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:37,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-07-14 06:16:37,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:16:37,222 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:37,222 INFO L85 PathProgramCache]: Analyzing trace with hash -152973646, now seen corresponding path program 1 times [2022-07-14 06:16:37,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:37,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212746765] [2022-07-14 06:16:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:37,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:37,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:37,224 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:37,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-14 06:16:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:37,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:16:37,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-14 06:16:37,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:16:37,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:37,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212746765] [2022-07-14 06:16:37,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212746765] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:37,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:37,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:16:37,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143600225] [2022-07-14 06:16:37,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:37,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:16:37,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:37,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:16:37,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:37,376 INFO L87 Difference]: Start difference. First operand 186 states and 219 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:16:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:37,676 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2022-07-14 06:16:37,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:16:37,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-07-14 06:16:37,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:37,677 INFO L225 Difference]: With dead ends: 238 [2022-07-14 06:16:37,677 INFO L226 Difference]: Without dead ends: 238 [2022-07-14 06:16:37,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:37,678 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 42 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:37,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 348 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:16:37,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-14 06:16:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 185. [2022-07-14 06:16:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 124 states have (on average 1.5241935483870968) internal successors, (189), 160 states have internal predecessors, (189), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-14 06:16:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 217 transitions. [2022-07-14 06:16:37,682 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 217 transitions. Word has length 44 [2022-07-14 06:16:37,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:37,682 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 217 transitions. [2022-07-14 06:16:37,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 06:16:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 217 transitions. [2022-07-14 06:16:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-14 06:16:37,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:37,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:37,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:37,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:16:37,883 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:37,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:37,884 INFO L85 PathProgramCache]: Analyzing trace with hash -152973645, now seen corresponding path program 1 times [2022-07-14 06:16:37,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:37,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572868158] [2022-07-14 06:16:37,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:37,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:37,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:37,885 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:37,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-14 06:16:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:38,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-14 06:16:38,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:38,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:38,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:38,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:38,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:38,518 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 06:16:38,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 06:16:38,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:38,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:16:38,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-14 06:16:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:38,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:16:41,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:16:41,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572868158] [2022-07-14 06:16:41,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572868158] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:16:41,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [896327361] [2022-07-14 06:16:41,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:41,239 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:16:41,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:16:41,240 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:16:41,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-07-14 06:16:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:41,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-14 06:16:41,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:41,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-14 06:16:41,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:42,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:42,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:42,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:16:42,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-14 06:16:42,711 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:16:42,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2022-07-14 06:16:42,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:16:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:45,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:16:49,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [896327361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:16:49,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:16:49,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-07-14 06:16:49,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296457114] [2022-07-14 06:16:49,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:16:49,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-14 06:16:49,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:16:49,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-14 06:16:49,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=647, Unknown=2, NotChecked=0, Total=756 [2022-07-14 06:16:49,722 INFO L87 Difference]: Start difference. First operand 185 states and 217 transitions. Second operand has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:16:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:51,601 INFO L93 Difference]: Finished difference Result 188 states and 219 transitions. [2022-07-14 06:16:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:16:51,601 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) Word has length 44 [2022-07-14 06:16:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:51,602 INFO L225 Difference]: With dead ends: 188 [2022-07-14 06:16:51,602 INFO L226 Difference]: Without dead ends: 188 [2022-07-14 06:16:51,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=195, Invalid=1063, Unknown=2, NotChecked=0, Total=1260 [2022-07-14 06:16:51,603 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 64 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:51,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 845 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 205 Invalid, 0 Unknown, 282 Unchecked, 0.4s Time] [2022-07-14 06:16:51,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-14 06:16:51,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2022-07-14 06:16:51,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 124 states have (on average 1.5161290322580645) internal successors, (188), 160 states have internal predecessors, (188), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-14 06:16:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 216 transitions. [2022-07-14 06:16:51,607 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 216 transitions. Word has length 44 [2022-07-14 06:16:51,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:51,607 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 216 transitions. [2022-07-14 06:16:51,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:16:51,607 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 216 transitions. [2022-07-14 06:16:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 06:16:51,607 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:51,608 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:51,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-14 06:16:51,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-07-14 06:16:52,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:16:52,016 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-07-14 06:16:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:52,017 INFO L85 PathProgramCache]: Analyzing trace with hash -410698476, now seen corresponding path program 1 times [2022-07-14 06:16:52,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:16:52,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548873122] [2022-07-14 06:16:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:52,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:16:52,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:16:52,018 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:16:52,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-14 06:16:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:52,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 06:16:52,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:52,307 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:16:52,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 06:16:52,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 06:16:52,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 06:16:52,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2022-07-14 06:16:52,556 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-14 06:16:52,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 24 [2022-07-14 06:16:52,602 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-14 06:16:52,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 30 [2022-07-14 06:16:52,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-14 06:16:52,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-07-14 06:16:53,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-14 06:16:53,239 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:16:53,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-07-14 06:16:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:16:53,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:16:53,624 INFO L356 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2022-07-14 06:16:53,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-14 06:16:53,746 INFO L356 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2022-07-14 06:16:53,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-14 06:16:54,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2022-07-14 06:17:01,221 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 38 DAG size of output: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:17:04,645 INFO L356 Elim1Store]: treesize reduction 99, result has 63.7 percent of original size [2022-07-14 06:17:04,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 65832 treesize of output 59737 [2022-07-14 06:17:06,863 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:17:06,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548873122] [2022-07-14 06:17:06,864 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-14 06:17:06,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-14 06:17:07,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:17:07,066 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:545) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:348) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-14 06:17:07,069 INFO L158 Benchmark]: Toolchain (without parser) took 72278.00ms. Allocated memory was 60.8MB in the beginning and 337.6MB in the end (delta: 276.8MB). Free memory was 37.8MB in the beginning and 234.3MB in the end (delta: -196.5MB). Peak memory consumption was 169.0MB. Max. memory is 16.1GB. [2022-07-14 06:17:07,069 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 60.8MB. Free memory was 42.4MB in the beginning and 42.4MB in the end (delta: 52.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:17:07,069 INFO L158 Benchmark]: CACSL2BoogieTranslator took 392.44ms. Allocated memory is still 60.8MB. Free memory was 37.6MB in the beginning and 30.8MB in the end (delta: 6.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-14 06:17:07,069 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.19ms. Allocated memory is still 60.8MB. Free memory was 30.6MB in the beginning and 28.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:17:07,069 INFO L158 Benchmark]: Boogie Preprocessor took 59.75ms. Allocated memory is still 60.8MB. Free memory was 28.2MB in the beginning and 26.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:17:07,070 INFO L158 Benchmark]: RCFGBuilder took 696.09ms. Allocated memory is still 75.5MB. Free memory was 58.0MB in the beginning and 53.0MB in the end (delta: 5.0MB). Peak memory consumption was 23.0MB. Max. memory is 16.1GB. [2022-07-14 06:17:07,070 INFO L158 Benchmark]: TraceAbstraction took 71070.95ms. Allocated memory was 75.5MB in the beginning and 337.6MB in the end (delta: 262.1MB). Free memory was 52.6MB in the beginning and 234.3MB in the end (delta: -181.6MB). Peak memory consumption was 170.5MB. Max. memory is 16.1GB. [2022-07-14 06:17:07,070 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 60.8MB. Free memory was 42.4MB in the beginning and 42.4MB in the end (delta: 52.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 392.44ms. Allocated memory is still 60.8MB. Free memory was 37.6MB in the beginning and 30.8MB in the end (delta: 6.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.19ms. Allocated memory is still 60.8MB. Free memory was 30.6MB in the beginning and 28.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.75ms. Allocated memory is still 60.8MB. Free memory was 28.2MB in the beginning and 26.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 696.09ms. Allocated memory is still 75.5MB. Free memory was 58.0MB in the beginning and 53.0MB in the end (delta: 5.0MB). Peak memory consumption was 23.0MB. Max. memory is 16.1GB. * TraceAbstraction took 71070.95ms. Allocated memory was 75.5MB in the beginning and 337.6MB in the end (delta: 262.1MB). Free memory was 52.6MB in the beginning and 234.3MB in the end (delta: -181.6MB). Peak memory consumption was 170.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-14 06:17:07,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range