./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0102-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e1ff0e6 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-0102-2.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 d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-15 01:01:28,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 01:01:28,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 01:01:28,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 01:01:28,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 01:01:28,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 01:01:28,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 01:01:28,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 01:01:28,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 01:01:28,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 01:01:28,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 01:01:28,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 01:01:28,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 01:01:28,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 01:01:28,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 01:01:28,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 01:01:28,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 01:01:28,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 01:01:28,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 01:01:28,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 01:01:28,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 01:01:28,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 01:01:28,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 01:01:28,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 01:01:28,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 01:01:28,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 01:01:28,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 01:01:28,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 01:01:28,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 01:01:28,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 01:01:28,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 01:01:28,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 01:01:28,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 01:01:28,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 01:01:28,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 01:01:28,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 01:01:28,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 01:01:28,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 01:01:28,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 01:01:28,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 01:01:28,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 01:01:28,865 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 01:01:28,885 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 01:01:28,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 01:01:28,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 01:01:28,885 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 01:01:28,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 01:01:28,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 01:01:28,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 01:01:28,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 01:01:28,887 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 01:01:28,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 01:01:28,888 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 01:01:28,888 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 01:01:28,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 01:01:28,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 01:01:28,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 01:01:28,888 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 01:01:28,888 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 01:01:28,888 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 01:01:28,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 01:01:28,889 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 01:01:28,889 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 01:01:28,889 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 01:01:28,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 01:01:28,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 01:01:28,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 01:01:28,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 01:01:28,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 01:01:28,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 01:01:28,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 01:01:28,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 01:01:28,890 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 01:01:28,890 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 01:01:28,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 01:01:28,890 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 01:01:28,890 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 [2023-02-15 01:01:29,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 01:01:29,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 01:01:29,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 01:01:29,125 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 01:01:29,126 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 01:01:29,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0102-2.i [2023-02-15 01:01:30,068 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 01:01:30,268 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 01:01:30,268 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0102-2.i [2023-02-15 01:01:30,276 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/589950f54/efbfa828598f406bb7c8fb8c8440c278/FLAG1efa86f69 [2023-02-15 01:01:30,287 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/589950f54/efbfa828598f406bb7c8fb8c8440c278 [2023-02-15 01:01:30,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 01:01:30,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 01:01:30,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 01:01:30,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 01:01:30,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 01:01:30,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:01:30" (1/1) ... [2023-02-15 01:01:30,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53db773c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:30, skipping insertion in model container [2023-02-15 01:01:30,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:01:30" (1/1) ... [2023-02-15 01:01:30,300 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 01:01:30,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 01:01:30,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 01:01:30,576 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) [2023-02-15 01:01:30,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e2eaba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:30, skipping insertion in model container [2023-02-15 01:01:30,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 01:01:30,578 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-02-15 01:01:30,579 INFO L158 Benchmark]: Toolchain (without parser) took 289.15ms. Allocated memory is still 157.3MB. Free memory was 124.0MB in the beginning and 111.0MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-15 01:01:30,580 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 123.7MB. Free memory is still 95.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 01:01:30,580 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.61ms. Allocated memory is still 157.3MB. Free memory was 124.0MB in the beginning and 111.0MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-15 01:01:30,581 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 123.7MB. Free memory is still 95.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 287.61ms. Allocated memory is still 157.3MB. Free memory was 124.0MB in the beginning and 111.0MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 551]: 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-0102-2.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 d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-15 01:01:32,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 01:01:32,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 01:01:32,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 01:01:32,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 01:01:32,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 01:01:32,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 01:01:32,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 01:01:32,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 01:01:32,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 01:01:32,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 01:01:32,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 01:01:32,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 01:01:32,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 01:01:32,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 01:01:32,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 01:01:32,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 01:01:32,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 01:01:32,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 01:01:32,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 01:01:32,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 01:01:32,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 01:01:32,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 01:01:32,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 01:01:32,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 01:01:32,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 01:01:32,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 01:01:32,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 01:01:32,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 01:01:32,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 01:01:32,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 01:01:32,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 01:01:32,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 01:01:32,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 01:01:32,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 01:01:32,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 01:01:32,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 01:01:32,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 01:01:32,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 01:01:32,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 01:01:32,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 01:01:32,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-02-15 01:01:32,388 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 01:01:32,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 01:01:32,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 01:01:32,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 01:01:32,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 01:01:32,391 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 01:01:32,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 01:01:32,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 01:01:32,391 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 01:01:32,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 01:01:32,392 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 01:01:32,392 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 01:01:32,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 01:01:32,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 01:01:32,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 01:01:32,393 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 01:01:32,393 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 01:01:32,393 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 01:01:32,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 01:01:32,394 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 01:01:32,394 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-15 01:01:32,394 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-15 01:01:32,394 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 01:01:32,394 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 01:01:32,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 01:01:32,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 01:01:32,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 01:01:32,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 01:01:32,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 01:01:32,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 01:01:32,395 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-15 01:01:32,395 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-15 01:01:32,396 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 01:01:32,396 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 01:01:32,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 01:01:32,396 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-15 01:01:32,396 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 01:01:32,396 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 [2023-02-15 01:01:32,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 01:01:32,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 01:01:32,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 01:01:32,701 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 01:01:32,701 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 01:01:32,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0102-2.i [2023-02-15 01:01:33,676 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 01:01:33,866 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 01:01:33,870 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0102-2.i [2023-02-15 01:01:33,881 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d002feada/ca9128cc8cb54f13a521a0253495ec74/FLAG84d62ce86 [2023-02-15 01:01:33,896 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d002feada/ca9128cc8cb54f13a521a0253495ec74 [2023-02-15 01:01:33,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 01:01:33,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 01:01:33,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 01:01:33,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 01:01:33,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 01:01:33,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:01:33" (1/1) ... [2023-02-15 01:01:33,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19bbb418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:33, skipping insertion in model container [2023-02-15 01:01:33,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:01:33" (1/1) ... [2023-02-15 01:01:33,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 01:01:33,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 01:01:34,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 01:01:34,229 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-02-15 01:01:34,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 01:01:34,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 01:01:34,295 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 01:01:34,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 01:01:34,348 INFO L208 MainTranslator]: Completed translation [2023-02-15 01:01:34,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:34 WrapperNode [2023-02-15 01:01:34,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 01:01:34,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 01:01:34,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 01:01:34,350 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 01:01:34,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:34" (1/1) ... [2023-02-15 01:01:34,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:34" (1/1) ... [2023-02-15 01:01:34,403 INFO L138 Inliner]: procedures = 136, calls = 37, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 101 [2023-02-15 01:01:34,403 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 01:01:34,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 01:01:34,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 01:01:34,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 01:01:34,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:34" (1/1) ... [2023-02-15 01:01:34,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:34" (1/1) ... [2023-02-15 01:01:34,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:34" (1/1) ... [2023-02-15 01:01:34,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:34" (1/1) ... [2023-02-15 01:01:34,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:34" (1/1) ... [2023-02-15 01:01:34,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:34" (1/1) ... [2023-02-15 01:01:34,421 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:34" (1/1) ... [2023-02-15 01:01:34,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:34" (1/1) ... [2023-02-15 01:01:34,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 01:01:34,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 01:01:34,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 01:01:34,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 01:01:34,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:34" (1/1) ... [2023-02-15 01:01:34,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 01:01:34,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:01:34,454 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 01:01:34,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 01:01:34,484 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2023-02-15 01:01:34,484 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2023-02-15 01:01:34,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 01:01:34,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 01:01:34,485 INFO L130 BoogieDeclarations]: Found specification of procedure create_sub_list [2023-02-15 01:01:34,485 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sub_list [2023-02-15 01:01:34,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 01:01:34,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 01:01:34,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 01:01:34,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-02-15 01:01:34,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 01:01:34,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-15 01:01:34,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-15 01:01:34,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 01:01:34,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 01:01:34,577 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 01:01:34,579 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 01:01:34,942 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 01:01:34,948 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 01:01:34,949 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-15 01:01:34,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:01:34 BoogieIcfgContainer [2023-02-15 01:01:34,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 01:01:34,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 01:01:34,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 01:01:34,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 01:01:34,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:01:33" (1/3) ... [2023-02-15 01:01:34,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c214b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:01:34, skipping insertion in model container [2023-02-15 01:01:34,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:01:34" (2/3) ... [2023-02-15 01:01:34,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c214b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:01:34, skipping insertion in model container [2023-02-15 01:01:34,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:01:34" (3/3) ... [2023-02-15 01:01:34,959 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0102-2.i [2023-02-15 01:01:34,975 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 01:01:34,976 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2023-02-15 01:01:35,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 01:01:35,033 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2e977237, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 01:01:35,033 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-02-15 01:01:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 76 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:01:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-15 01:01:35,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:35,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-15 01:01:35,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:35,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:35,047 INFO L85 PathProgramCache]: Analyzing trace with hash 60205689, now seen corresponding path program 1 times [2023-02-15 01:01:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:35,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096674548] [2023-02-15 01:01:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:35,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:35,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:35,060 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:35,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-02-15 01:01:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:35,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 01:01:35,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:35,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:01:35,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:01:35,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096674548] [2023-02-15 01:01:35,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096674548] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:35,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:35,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:01:35,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517590706] [2023-02-15 01:01:35,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:35,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 01:01:35,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:01:35,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 01:01:35,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 01:01:35,197 INFO L87 Difference]: Start difference. First operand has 83 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 76 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2023-02-15 01:01:35,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:35,231 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2023-02-15 01:01:35,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 01:01:35,232 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 [2023-02-15 01:01:35,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:35,236 INFO L225 Difference]: With dead ends: 83 [2023-02-15 01:01:35,237 INFO L226 Difference]: Without dead ends: 81 [2023-02-15 01:01:35,238 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 [2023-02-15 01:01:35,240 INFO L413 NwaCegarLoop]: 88 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, 88 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 [2023-02-15 01:01:35,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:01:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-15 01:01:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-02-15 01:01:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 74 states have internal predecessors, (78), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:01:35,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2023-02-15 01:01:35,272 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 5 [2023-02-15 01:01:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:35,273 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2023-02-15 01:01:35,273 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) [2023-02-15 01:01:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2023-02-15 01:01:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 01:01:35,274 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:35,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:35,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:35,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:35,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:35,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:35,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2005144647, now seen corresponding path program 1 times [2023-02-15 01:01:35,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:35,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096225850] [2023-02-15 01:01:35,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:35,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:35,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:35,488 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:35,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-02-15 01:01:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:35,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 01:01:35,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:35,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:01:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:35,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:01:35,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:01:35,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096225850] [2023-02-15 01:01:35,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096225850] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:35,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:35,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:01:35,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69855907] [2023-02-15 01:01:35,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:35,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 01:01:35,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:01:35,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 01:01:35,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:01:35,683 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-02-15 01:01:35,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:35,921 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2023-02-15 01:01:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 01:01:35,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2023-02-15 01:01:35,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:35,923 INFO L225 Difference]: With dead ends: 108 [2023-02-15 01:01:35,924 INFO L226 Difference]: Without dead ends: 108 [2023-02-15 01:01:35,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:01:35,925 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 60 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:35,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 162 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:01:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-15 01:01:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 79. [2023-02-15 01:01:35,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:01:35,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2023-02-15 01:01:35,932 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 7 [2023-02-15 01:01:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:35,932 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2023-02-15 01:01:35,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-02-15 01:01:35,933 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2023-02-15 01:01:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 01:01:35,933 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:35,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:35,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:36,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:36,141 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:36,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:36,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2005144648, now seen corresponding path program 1 times [2023-02-15 01:01:36,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:36,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606868671] [2023-02-15 01:01:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:36,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:36,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:36,143 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:36,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-02-15 01:01:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:36,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 01:01:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:36,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:01:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:36,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:01:36,243 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:01:36,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606868671] [2023-02-15 01:01:36,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606868671] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:36,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:36,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:01:36,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037488988] [2023-02-15 01:01:36,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:36,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 01:01:36,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:01:36,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 01:01:36,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:01:36,245 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-02-15 01:01:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:36,543 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2023-02-15 01:01:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 01:01:36,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2023-02-15 01:01:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:36,545 INFO L225 Difference]: With dead ends: 83 [2023-02-15 01:01:36,545 INFO L226 Difference]: Without dead ends: 83 [2023-02-15 01:01:36,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:01:36,546 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 5 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:36,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 234 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:01:36,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-15 01:01:36,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2023-02-15 01:01:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 74 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:01:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2023-02-15 01:01:36,558 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 7 [2023-02-15 01:01:36,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:36,558 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2023-02-15 01:01:36,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-02-15 01:01:36,560 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2023-02-15 01:01:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 01:01:36,560 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:36,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:36,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:36,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:36,768 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting create_sub_listErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:36,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash 859208239, now seen corresponding path program 1 times [2023-02-15 01:01:36,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:36,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801334466] [2023-02-15 01:01:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:36,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:36,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:36,773 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:36,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-02-15 01:01:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:36,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 01:01:36,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:36,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:01:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:36,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:01:36,846 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:01:36,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801334466] [2023-02-15 01:01:36,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801334466] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:36,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:36,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:01:36,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492769274] [2023-02-15 01:01:36,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:36,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:01:36,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:01:36,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:01:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:01:36,848 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2023-02-15 01:01:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:36,951 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2023-02-15 01:01:36,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:01:36,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 [2023-02-15 01:01:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:36,953 INFO L225 Difference]: With dead ends: 82 [2023-02-15 01:01:36,953 INFO L226 Difference]: Without dead ends: 82 [2023-02-15 01:01:36,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:01:36,954 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:36,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 122 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:36,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-15 01:01:36,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2023-02-15 01:01:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 73 states have internal predecessors, (78), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:01:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2023-02-15 01:01:36,962 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 11 [2023-02-15 01:01:36,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:36,962 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2023-02-15 01:01:36,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2023-02-15 01:01:36,963 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2023-02-15 01:01:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 01:01:36,963 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:36,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:36,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:37,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:37,173 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting create_sub_listErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:37,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash 859208240, now seen corresponding path program 1 times [2023-02-15 01:01:37,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:37,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944671311] [2023-02-15 01:01:37,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:37,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:37,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:37,175 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:37,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-02-15 01:01:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:37,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 01:01:37,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:37,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:01:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:37,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:01:37,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:01:37,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944671311] [2023-02-15 01:01:37,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944671311] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:37,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:37,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:01:37,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204915550] [2023-02-15 01:01:37,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:37,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:01:37,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:01:37,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:01:37,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:01:37,269 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2023-02-15 01:01:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:37,361 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2023-02-15 01:01:37,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:01:37,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 [2023-02-15 01:01:37,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:37,365 INFO L225 Difference]: With dead ends: 81 [2023-02-15 01:01:37,365 INFO L226 Difference]: Without dead ends: 81 [2023-02-15 01:01:37,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:01:37,366 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:37,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 126 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:37,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-15 01:01:37,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2023-02-15 01:01:37,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 72 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:01:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2023-02-15 01:01:37,370 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 11 [2023-02-15 01:01:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:37,370 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2023-02-15 01:01:37,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2023-02-15 01:01:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2023-02-15 01:01:37,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 01:01:37,371 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:37,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:37,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:37,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:37,574 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting list_add_tailErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:37,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1332328513, now seen corresponding path program 1 times [2023-02-15 01:01:37,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:37,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504667567] [2023-02-15 01:01:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:37,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:37,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:37,576 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:37,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-02-15 01:01:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:37,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 01:01:37,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:37,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:01:37,713 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-15 01:01:37,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-02-15 01:01:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:37,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:01:37,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:01:37,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504667567] [2023-02-15 01:01:37,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504667567] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:37,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:37,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 01:01:37,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480324039] [2023-02-15 01:01:37,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:37,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 01:01:37,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:01:37,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 01:01:37,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:01:37,753 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:38,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:38,069 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2023-02-15 01:01:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 01:01:38,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-15 01:01:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:38,070 INFO L225 Difference]: With dead ends: 129 [2023-02-15 01:01:38,070 INFO L226 Difference]: Without dead ends: 129 [2023-02-15 01:01:38,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-15 01:01:38,071 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 108 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:38,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 235 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:01:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-15 01:01:38,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 90. [2023-02-15 01:01:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 81 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:01:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2023-02-15 01:01:38,075 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 14 [2023-02-15 01:01:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:38,076 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2023-02-15 01:01:38,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2023-02-15 01:01:38,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 01:01:38,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:38,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:38,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:38,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:38,277 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting list_add_tailErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:38,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:38,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1332328512, now seen corresponding path program 1 times [2023-02-15 01:01:38,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:38,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668665996] [2023-02-15 01:01:38,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:38,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:38,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:38,279 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:38,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-02-15 01:01:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:38,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 01:01:38,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:38,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:01:38,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:01:38,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:01:38,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 01:01:38,460 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:01:38,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:01:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:38,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:01:38,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:01:38,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668665996] [2023-02-15 01:01:38,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668665996] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:38,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:38,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 01:01:38,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679021143] [2023-02-15 01:01:38,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:38,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 01:01:38,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:01:38,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 01:01:38,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:01:38,529 INFO L87 Difference]: Start difference. First operand 90 states and 103 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:38,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:38,932 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2023-02-15 01:01:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 01:01:38,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-15 01:01:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:38,933 INFO L225 Difference]: With dead ends: 117 [2023-02-15 01:01:38,933 INFO L226 Difference]: Without dead ends: 117 [2023-02-15 01:01:38,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-15 01:01:38,934 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 52 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:38,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 298 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:01:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-15 01:01:38,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 108. [2023-02-15 01:01:38,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.676056338028169) internal successors, (119), 97 states have internal predecessors, (119), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 01:01:38,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2023-02-15 01:01:38,939 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 14 [2023-02-15 01:01:38,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:38,939 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2023-02-15 01:01:38,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2023-02-15 01:01:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 01:01:38,939 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:38,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:38,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:39,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:39,147 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting list_add_tailErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:39,148 INFO L85 PathProgramCache]: Analyzing trace with hash -467443808, now seen corresponding path program 1 times [2023-02-15 01:01:39,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:39,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508259613] [2023-02-15 01:01:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:39,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:39,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:39,150 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:39,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-02-15 01:01:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:39,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 01:01:39,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:39,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:01:39,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:01:39,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508259613] [2023-02-15 01:01:39,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508259613] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:39,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:39,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:01:39,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064950772] [2023-02-15 01:01:39,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:39,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:01:39,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:01:39,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:01:39,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:01:39,265 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:39,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:39,352 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2023-02-15 01:01:39,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:01:39,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 01:01:39,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:39,354 INFO L225 Difference]: With dead ends: 107 [2023-02-15 01:01:39,354 INFO L226 Difference]: Without dead ends: 107 [2023-02-15 01:01:39,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:01:39,355 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 27 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:39,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 154 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:01:39,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-15 01:01:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-02-15 01:01:39,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.6338028169014085) internal successors, (116), 96 states have internal predecessors, (116), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 01:01:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2023-02-15 01:01:39,359 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 16 [2023-02-15 01:01:39,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:39,359 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2023-02-15 01:01:39,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:39,359 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2023-02-15 01:01:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 01:01:39,359 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:39,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:39,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:39,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:39,570 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting list_add_tailErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:39,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:39,571 INFO L85 PathProgramCache]: Analyzing trace with hash -467443807, now seen corresponding path program 1 times [2023-02-15 01:01:39,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:39,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413343565] [2023-02-15 01:01:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:39,571 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:39,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:39,573 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:39,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-02-15 01:01:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:39,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 01:01:39,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:39,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:01:39,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:01:39,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413343565] [2023-02-15 01:01:39,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413343565] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:39,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:39,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 01:01:39,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353934029] [2023-02-15 01:01:39,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:39,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 01:01:39,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:01:39,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 01:01:39,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-02-15 01:01:39,738 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:39,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:39,998 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2023-02-15 01:01:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 01:01:39,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 01:01:39,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:40,000 INFO L225 Difference]: With dead ends: 115 [2023-02-15 01:01:40,000 INFO L226 Difference]: Without dead ends: 115 [2023-02-15 01:01:40,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-02-15 01:01:40,000 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 113 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:40,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 456 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:01:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-15 01:01:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2023-02-15 01:01:40,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.619718309859155) internal successors, (115), 96 states have internal predecessors, (115), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 01:01:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2023-02-15 01:01:40,005 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 16 [2023-02-15 01:01:40,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:40,005 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2023-02-15 01:01:40,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2023-02-15 01:01:40,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 01:01:40,006 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:40,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:40,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-02-15 01:01:40,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:40,214 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting list_add_tailErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:40,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:40,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1605856063, now seen corresponding path program 1 times [2023-02-15 01:01:40,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:40,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560614351] [2023-02-15 01:01:40,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:40,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:40,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:40,219 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:40,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-02-15 01:01:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:40,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 01:01:40,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:40,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:01:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:40,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:01:40,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:01:40,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560614351] [2023-02-15 01:01:40,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560614351] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:40,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:40,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 01:01:40,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278846847] [2023-02-15 01:01:40,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:40,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:01:40,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:01:40,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:01:40,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:01:40,335 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:40,521 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2023-02-15 01:01:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:01:40,522 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-15 01:01:40,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:40,522 INFO L225 Difference]: With dead ends: 114 [2023-02-15 01:01:40,522 INFO L226 Difference]: Without dead ends: 114 [2023-02-15 01:01:40,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:01:40,523 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 49 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:40,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 226 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:01:40,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-15 01:01:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2023-02-15 01:01:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.5492957746478873) internal successors, (110), 95 states have internal predecessors, (110), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 01:01:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2023-02-15 01:01:40,527 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 17 [2023-02-15 01:01:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:40,527 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2023-02-15 01:01:40,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:40,527 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2023-02-15 01:01:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 01:01:40,527 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:40,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:40,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:40,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:40,733 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting list_add_tailErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:40,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:40,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1605856062, now seen corresponding path program 1 times [2023-02-15 01:01:40,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:40,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249066876] [2023-02-15 01:01:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:40,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:40,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:40,735 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:40,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-02-15 01:01:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:40,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 01:01:40,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:40,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:01:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:40,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:01:40,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:01:40,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249066876] [2023-02-15 01:01:40,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249066876] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:40,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:40,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 01:01:40,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225064253] [2023-02-15 01:01:40,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:40,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:01:40,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:01:40,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:01:40,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:01:40,914 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:41,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:41,155 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2023-02-15 01:01:41,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:01:41,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-15 01:01:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:41,157 INFO L225 Difference]: With dead ends: 112 [2023-02-15 01:01:41,157 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 01:01:41,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:01:41,158 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 36 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:41,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 246 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:01:41,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 01:01:41,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2023-02-15 01:01:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.4929577464788732) internal successors, (106), 95 states have internal predecessors, (106), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 01:01:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2023-02-15 01:01:41,161 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 17 [2023-02-15 01:01:41,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:41,161 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2023-02-15 01:01:41,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2023-02-15 01:01:41,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 01:01:41,161 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:41,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:41,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:41,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:41,372 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting list_add_tailErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:41,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:41,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1334414076, now seen corresponding path program 1 times [2023-02-15 01:01:41,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:41,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036402432] [2023-02-15 01:01:41,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:41,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:41,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:41,373 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:41,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-02-15 01:01:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:41,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 01:01:41,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:41,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:01:41,592 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:01:41,621 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:01:41,639 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:01:41,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:01:41,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:01:41,712 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 7 [2023-02-15 01:01:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:41,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:01:41,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:01:41,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036402432] [2023-02-15 01:01:41,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036402432] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:41,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:41,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 01:01:41,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927666607] [2023-02-15 01:01:41,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:41,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 01:01:41,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:01:41,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 01:01:41,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:01:41,744 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:42,398 INFO L93 Difference]: Finished difference Result 162 states and 177 transitions. [2023-02-15 01:01:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 01:01:42,399 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 01:01:42,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:42,401 INFO L225 Difference]: With dead ends: 162 [2023-02-15 01:01:42,401 INFO L226 Difference]: Without dead ends: 162 [2023-02-15 01:01:42,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-02-15 01:01:42,401 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 80 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:42,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 356 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 01:01:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-15 01:01:42,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 128. [2023-02-15 01:01:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 91 states have (on average 1.4285714285714286) internal successors, (130), 115 states have internal predecessors, (130), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 01:01:42,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2023-02-15 01:01:42,406 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 19 [2023-02-15 01:01:42,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:42,406 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2023-02-15 01:01:42,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:42,407 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2023-02-15 01:01:42,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 01:01:42,407 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:42,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:01:42,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-02-15 01:01:42,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:42,613 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:42,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:42,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1334414075, now seen corresponding path program 1 times [2023-02-15 01:01:42,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:42,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377665866] [2023-02-15 01:01:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:42,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:42,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:42,615 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:42,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-02-15 01:01:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:42,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 01:01:42,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:42,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:01:42,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:01:42,823 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:01:42,828 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:01:42,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:01:42,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:01:42,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:01:42,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:01:42,887 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:01:42,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:01:42,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 01:01:42,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 01:01:42,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 01:01:43,016 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 01:01:43,019 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 01:01:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:43,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:01:43,066 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:01:43,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377665866] [2023-02-15 01:01:43,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377665866] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:01:43,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:01:43,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 01:01:43,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729458147] [2023-02-15 01:01:43,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:01:43,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 01:01:43,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:01:43,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 01:01:43,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:01:43,067 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:43,758 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2023-02-15 01:01:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 01:01:43,759 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 01:01:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:43,760 INFO L225 Difference]: With dead ends: 131 [2023-02-15 01:01:43,760 INFO L226 Difference]: Without dead ends: 131 [2023-02-15 01:01:43,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-02-15 01:01:43,761 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 33 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:43,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 426 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 01:01:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-15 01:01:43,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-02-15 01:01:43,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 93 states have (on average 1.4086021505376345) internal successors, (131), 118 states have internal predecessors, (131), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 01:01:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2023-02-15 01:01:43,765 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 19 [2023-02-15 01:01:43,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:43,765 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2023-02-15 01:01:43,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:01:43,765 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2023-02-15 01:01:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 01:01:43,766 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:43,766 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 01:01:43,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:43,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:43,975 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:43,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:43,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1965497160, now seen corresponding path program 1 times [2023-02-15 01:01:43,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:43,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973772326] [2023-02-15 01:01:43,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:43,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:43,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:43,976 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:43,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-02-15 01:01:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:44,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 01:01:44,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:44,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:01:44,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:01:44,178 WARN L859 $PredicateComparison]: unable to prove that (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_448 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_448))) (= (_ bv0 1) (select |c_old(#valid)| |create_sub_list_insert_sub_~sub~0#1.base|)))) is different from true [2023-02-15 01:01:44,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:01:44,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:01:44,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 01:01:44,263 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:01:44,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:01:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:44,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:01:46,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:01:46,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973772326] [2023-02-15 01:01:46,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973772326] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:01:46,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1592469929] [2023-02-15 01:01:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:46,590 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-15 01:01:46,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-15 01:01:46,592 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) [2023-02-15 01:01:46,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-02-15 01:01:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:46,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 01:01:46,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:46,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:01:46,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:01:47,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:01:47,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:01:47,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 01:01:47,253 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:01:47,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:01:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:47,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:01:47,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1592469929] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:01:47,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 01:01:47,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 13 [2023-02-15 01:01:47,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103783685] [2023-02-15 01:01:47,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 01:01:47,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 01:01:47,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:01:47,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 01:01:47,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=4, NotChecked=32, Total=342 [2023-02-15 01:01:47,779 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 01:01:50,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 01:01:54,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 01:01:56,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:01:56,966 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2023-02-15 01:01:56,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 01:01:56,967 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2023-02-15 01:01:56,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:01:56,968 INFO L225 Difference]: With dead ends: 146 [2023-02-15 01:01:56,968 INFO L226 Difference]: Without dead ends: 146 [2023-02-15 01:01:56,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=80, Invalid=470, Unknown=6, NotChecked=44, Total=600 [2023-02-15 01:01:56,968 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 65 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-15 01:01:56,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 394 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 412 Invalid, 2 Unknown, 90 Unchecked, 4.8s Time] [2023-02-15 01:01:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-15 01:01:56,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2023-02-15 01:01:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 99 states have (on average 1.393939393939394) internal successors, (138), 123 states have internal predecessors, (138), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-15 01:01:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2023-02-15 01:01:56,972 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 29 [2023-02-15 01:01:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:01:56,972 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2023-02-15 01:01:56,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 01:01:56,972 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2023-02-15 01:01:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 01:01:56,973 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:01:56,973 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2023-02-15 01:01:57,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:57,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-02-15 01:01:57,375 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 -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:57,375 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting list_add_tailErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:01:57,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:01:57,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1572542800, now seen corresponding path program 1 times [2023-02-15 01:01:57,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:01:57,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687310964] [2023-02-15 01:01:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:01:57,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:01:57,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:01:57,377 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:01:57,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-02-15 01:01:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:01:57,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-15 01:01:57,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:01:57,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:01:57,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 01:01:57,966 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:01:57,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:01:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:01:58,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:01:59,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2023-02-15 01:01:59,249 INFO L321 Elim1Store]: treesize reduction 7, result has 77.4 percent of original size [2023-02-15 01:01:59,249 INFO L350 Elim1Store]: Elim1 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 50 treesize of output 67 [2023-02-15 01:01:59,727 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 01:01:59,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2023-02-15 01:01:59,743 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-15 01:01:59,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-02-15 01:02:00,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 01:02:00,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2023-02-15 01:02:00,288 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-15 01:02:00,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-02-15 01:02:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:00,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:02:00,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687310964] [2023-02-15 01:02:00,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687310964] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:02:00,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 01:02:00,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2023-02-15 01:02:00,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637109737] [2023-02-15 01:02:00,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 01:02:00,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 01:02:00,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:02:00,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 01:02:00,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2023-02-15 01:02:00,490 INFO L87 Difference]: Start difference. First operand 139 states and 155 transitions. Second operand has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:02:04,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:04,678 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2023-02-15 01:02:04,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 01:02:04,679 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2023-02-15 01:02:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:04,680 INFO L225 Difference]: With dead ends: 168 [2023-02-15 01:02:04,680 INFO L226 Difference]: Without dead ends: 168 [2023-02-15 01:02:04,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 01:02:04,681 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 296 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:04,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 597 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-02-15 01:02:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-15 01:02:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2023-02-15 01:02:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 98 states have (on average 1.336734693877551) internal successors, (131), 120 states have internal predecessors, (131), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-15 01:02:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2023-02-15 01:02:04,686 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 36 [2023-02-15 01:02:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:04,687 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2023-02-15 01:02:04,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 01:02:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2023-02-15 01:02:04,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 01:02:04,687 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:04,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:04,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-02-15 01:02:04,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:02:04,888 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting list_add_tailErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:02:04,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:04,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1746009876, now seen corresponding path program 1 times [2023-02-15 01:02:04,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:02:04,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236601240] [2023-02-15 01:02:04,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:04,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:02:04,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:02:04,890 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:02:04,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-02-15 01:02:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:05,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-15 01:02:05,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:05,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:02:05,342 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:02:05,369 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:02:05,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:05,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:02:05,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:05,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:02:05,428 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-15 01:02:05,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-02-15 01:02:05,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:02:05,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:02:05,553 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2023-02-15 01:02:05,558 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2023-02-15 01:02:06,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2023-02-15 01:02:06,351 INFO L321 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2023-02-15 01:02:06,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 128 [2023-02-15 01:02:06,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 96 [2023-02-15 01:02:06,367 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 24 [2023-02-15 01:02:06,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 30 [2023-02-15 01:02:06,553 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2023-02-15 01:02:06,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2023-02-15 01:02:06,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-02-15 01:02:06,943 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 19 [2023-02-15 01:02:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:07,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:02:10,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:02:10,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236601240] [2023-02-15 01:02:10,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236601240] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:10,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [876719347] [2023-02-15 01:02:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:10,860 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-15 01:02:10,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-15 01:02:10,861 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-15 01:02:10,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-02-15 01:02:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-15 01:02:11,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:11,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:02:11,436 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:02:11,444 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:02:11,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:11,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:02:11,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:11,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:02:11,513 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-15 01:02:11,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-02-15 01:02:11,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:02:11,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:02:11,628 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2023-02-15 01:02:11,633 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2023-02-15 01:02:12,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2023-02-15 01:02:12,310 INFO L321 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2023-02-15 01:02:12,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 128 [2023-02-15 01:02:12,318 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 26 [2023-02-15 01:02:12,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:12,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 84 [2023-02-15 01:02:12,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 22 [2023-02-15 01:02:12,429 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2023-02-15 01:02:12,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2023-02-15 01:02:12,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-02-15 01:02:12,851 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 15 [2023-02-15 01:02:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:13,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:02:13,078 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_835 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_835) |c_create_sub_list_insert_sub_~head#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (_ bv1 1)))) is different from false [2023-02-15 01:02:14,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [876719347] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:14,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 01:02:14,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 27 [2023-02-15 01:02:14,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546779481] [2023-02-15 01:02:14,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 01:02:14,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 01:02:14,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:02:14,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 01:02:14,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1247, Unknown=48, NotChecked=72, Total=1482 [2023-02-15 01:02:14,272 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 28 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:20,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:02:20,315 INFO L93 Difference]: Finished difference Result 156 states and 169 transitions. [2023-02-15 01:02:20,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 01:02:20,316 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2023-02-15 01:02:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:02:20,316 INFO L225 Difference]: With dead ends: 156 [2023-02-15 01:02:20,317 INFO L226 Difference]: Without dead ends: 156 [2023-02-15 01:02:20,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=309, Invalid=2805, Unknown=82, NotChecked=110, Total=3306 [2023-02-15 01:02:20,318 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 74 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 23 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:02:20,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1048 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1179 Invalid, 18 Unknown, 0 Unchecked, 3.2s Time] [2023-02-15 01:02:20,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-15 01:02:20,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2023-02-15 01:02:20,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 110 states have (on average 1.309090909090909) internal successors, (144), 133 states have internal predecessors, (144), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-15 01:02:20,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 163 transitions. [2023-02-15 01:02:20,323 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 163 transitions. Word has length 35 [2023-02-15 01:02:20,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:02:20,323 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 163 transitions. [2023-02-15 01:02:20,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:02:20,323 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 163 transitions. [2023-02-15 01:02:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 01:02:20,326 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:02:20,326 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:02:20,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2023-02-15 01:02:20,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-02-15 01:02:20,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:02:20,729 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:02:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:02:20,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1746009877, now seen corresponding path program 1 times [2023-02-15 01:02:20,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:02:20,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215556941] [2023-02-15 01:02:20,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:20,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:02:20,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:02:20,731 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:02:20,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-02-15 01:02:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:21,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-15 01:02:21,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:21,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:02:21,128 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:02:21,132 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:02:21,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:21,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:02:21,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:21,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:02:21,187 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-15 01:02:21,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-02-15 01:02:21,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:02:21,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:02:21,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:02:21,291 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2023-02-15 01:02:21,295 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2023-02-15 01:02:22,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 79 [2023-02-15 01:02:22,664 INFO L321 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2023-02-15 01:02:22,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 162 treesize of output 188 [2023-02-15 01:02:22,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 60 [2023-02-15 01:02:22,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:22,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 106 [2023-02-15 01:02:22,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:22,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2023-02-15 01:02:22,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:22,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2023-02-15 01:02:22,903 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-02-15 01:02:22,903 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 26 [2023-02-15 01:02:22,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:02:23,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 01:02:23,038 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 01:02:23,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 64 [2023-02-15 01:02:23,290 INFO L350 Elim1Store]: Elim1 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 13 [2023-02-15 01:02:23,294 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2023-02-15 01:02:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:23,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:02:24,179 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (and (forall ((v_ArrVal_965 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_965) |c_create_sub_list_insert_sub_~head#1.base|) .cse1))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_964 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_965 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_965) |c_create_sub_list_insert_sub_~head#1.base|) .cse1) (_ bv4 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_964) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)))))) is different from false [2023-02-15 01:02:31,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:02:31,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215556941] [2023-02-15 01:02:31,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215556941] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:31,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1311349887] [2023-02-15 01:02:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:02:31,676 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-15 01:02:31,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-15 01:02:31,677 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-15 01:02:31,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2023-02-15 01:02:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:02:32,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 100 conjunts are in the unsatisfiable core [2023-02-15 01:02:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:02:32,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:02:32,486 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:02:32,491 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:02:32,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:32,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:02:32,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:32,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:02:32,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:02:32,534 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-15 01:02:32,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-02-15 01:02:32,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:02:32,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:02:32,610 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2023-02-15 01:02:32,614 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2023-02-15 01:02:36,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 86 [2023-02-15 01:02:36,237 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 71 [2023-02-15 01:02:36,280 INFO L321 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2023-02-15 01:02:36,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 124 treesize of output 150 [2023-02-15 01:02:36,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:36,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 106 [2023-02-15 01:02:36,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:36,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2023-02-15 01:02:36,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:02:36,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2023-02-15 01:02:36,796 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-02-15 01:02:36,796 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 26 [2023-02-15 01:02:36,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:02:37,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 01:02:37,021 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 01:02:37,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 64 [2023-02-15 01:02:37,051 INFO L350 Elim1Store]: Elim1 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 13 [2023-02-15 01:02:37,056 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2023-02-15 01:02:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:02:37,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:02:37,283 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (and (forall ((v_ArrVal_1104 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1105 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1104) |c_create_sub_list_insert_sub_~head#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1105) |c_create_sub_list_insert_sub_~head#1.base|) .cse0)))) (forall ((v_ArrVal_1104 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1104) |c_create_sub_list_insert_sub_~head#1.base|) .cse0))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))))) is different from false [2023-02-15 01:02:47,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1311349887] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:02:47,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 01:02:47,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2023-02-15 01:02:47,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226575079] [2023-02-15 01:02:47,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 01:02:47,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 01:02:47,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:02:47,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 01:02:47,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1419, Unknown=31, NotChecked=154, Total=1722 [2023-02-15 01:02:47,717 INFO L87 Difference]: Start difference. First operand 150 states and 163 transitions. Second operand has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 01:03:01,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:03:01,494 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2023-02-15 01:03:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 01:03:01,494 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-02-15 01:03:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:03:01,495 INFO L225 Difference]: With dead ends: 150 [2023-02-15 01:03:01,495 INFO L226 Difference]: Without dead ends: 150 [2023-02-15 01:03:01,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=216, Invalid=2406, Unknown=38, NotChecked=202, Total=2862 [2023-02-15 01:03:01,496 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 53 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 14 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-02-15 01:03:01,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 913 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1189 Invalid, 18 Unknown, 0 Unchecked, 6.4s Time] [2023-02-15 01:03:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-15 01:03:01,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-02-15 01:03:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 110 states have (on average 1.3) internal successors, (143), 133 states have internal predecessors, (143), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-15 01:03:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 162 transitions. [2023-02-15 01:03:01,501 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 162 transitions. Word has length 35 [2023-02-15 01:03:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:03:01,501 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 162 transitions. [2023-02-15 01:03:01,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 01:03:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 162 transitions. [2023-02-15 01:03:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 01:03:01,505 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:03:01,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:03:01,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-02-15 01:03:01,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2023-02-15 01:03:01,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-02-15 01:03:01,909 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:03:01,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:03:01,910 INFO L85 PathProgramCache]: Analyzing trace with hash 879107445, now seen corresponding path program 1 times [2023-02-15 01:03:01,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:03:01,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833645031] [2023-02-15 01:03:01,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:03:01,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:03:01,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:03:01,912 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:03:01,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-02-15 01:03:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:03:02,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 01:03:02,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:03:02,481 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:03:02,493 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:03:02,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:03:02,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:03:02,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:03:02,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:03:02,602 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:03:02,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:03:02,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:03:02,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:03:02,930 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 01:03:02,939 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 01:03:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:03:03,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:03:03,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 01:03:03,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 50 [2023-02-15 01:03:03,876 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (and (forall ((v_ArrVal_1240 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1240) |c_create_sub_list_insert_sub_~head#1.base|) .cse0) |c_create_sub_list_insert_sub_~head#1.base|)) (forall ((v_ArrVal_1241 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1241) |c_create_sub_list_insert_sub_~head#1.base|) .cse0)) (bvadd (_ bv8 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (forall ((v_ArrVal_1241 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1241) |c_create_sub_list_insert_sub_~head#1.base|) .cse0))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))))) is different from false [2023-02-15 01:03:08,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 01:03:08,872 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 49 treesize of output 42 [2023-02-15 01:03:08,878 INFO L350 Elim1Store]: Elim1 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 50 treesize of output 32 [2023-02-15 01:03:08,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-15 01:03:08,916 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-02-15 01:03:08,916 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 25 treesize of output 1 [2023-02-15 01:03:08,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 01:03:08,937 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 29 treesize of output 35 [2023-02-15 01:03:08,945 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 01:03:08,948 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 12 [2023-02-15 01:03:09,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 01:03:09,938 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 66 [2023-02-15 01:03:10,260 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-15 01:03:10,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-02-15 01:03:10,297 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-15 01:03:10,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-02-15 01:03:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-02-15 01:03:10,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:03:10,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833645031] [2023-02-15 01:03:10,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833645031] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:03:10,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 01:03:10,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2023-02-15 01:03:10,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054211564] [2023-02-15 01:03:10,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 01:03:10,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 01:03:10,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:03:10,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 01:03:10,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=734, Unknown=6, NotChecked=54, Total=870 [2023-02-15 01:03:10,330 INFO L87 Difference]: Start difference. First operand 150 states and 162 transitions. Second operand has 30 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 7 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:03:15,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 01:03:24,107 WARN L233 SmtUtils]: Spent 7.27s on a formula simplification. DAG size of input: 103 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 01:03:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:03:34,032 INFO L93 Difference]: Finished difference Result 182 states and 194 transitions. [2023-02-15 01:03:34,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 01:03:34,033 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 7 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2023-02-15 01:03:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:03:34,034 INFO L225 Difference]: With dead ends: 182 [2023-02-15 01:03:34,034 INFO L226 Difference]: Without dead ends: 182 [2023-02-15 01:03:34,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=327, Invalid=2322, Unknown=7, NotChecked=100, Total=2756 [2023-02-15 01:03:34,035 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 259 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 41 mSolverCounterUnsat, 36 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 36 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:03:34,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 764 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1092 Invalid, 36 Unknown, 133 Unchecked, 9.1s Time] [2023-02-15 01:03:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-15 01:03:34,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 153. [2023-02-15 01:03:34,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.2857142857142858) internal successors, (144), 136 states have internal predecessors, (144), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-15 01:03:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 163 transitions. [2023-02-15 01:03:34,038 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 163 transitions. Word has length 41 [2023-02-15 01:03:34,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:03:34,038 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 163 transitions. [2023-02-15 01:03:34,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 7 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:03:34,039 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 163 transitions. [2023-02-15 01:03:34,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 01:03:34,039 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:03:34,039 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:03:34,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-02-15 01:03:34,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:03:34,248 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:03:34,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:03:34,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1398479560, now seen corresponding path program 1 times [2023-02-15 01:03:34,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:03:34,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390838939] [2023-02-15 01:03:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:03:34,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:03:34,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:03:34,250 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:03:34,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-02-15 01:03:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:03:34,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-15 01:03:34,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:03:34,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:03:34,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:03:34,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:03:34,891 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:03:34,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:03:34,912 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_create_sub_list_insert_sub_~sub~0#1.base_38| (_ BitVec 32)) (|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32)) (v_ArrVal_1343 (_ BitVec 32)) (v_ArrVal_1342 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |v_create_sub_list_insert_sub_~sub~0#1.base_38|)) (= (store (store |c_old(#length)| |v_create_sub_list_insert_sub_~sub~0#1.base_38| v_ArrVal_1342) |create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1343) |c_#length|) (not (= |c_create_sub_list_#in~sub#1.base| |create_sub_list_insert_sub_~sub~0#1.base|)))) is different from true [2023-02-15 01:03:34,982 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:03:34,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-15 01:03:34,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-15 01:03:35,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:03:35,086 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:03:35,086 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 15 treesize of output 23 [2023-02-15 01:03:35,110 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:03:35,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:03:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2023-02-15 01:03:35,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:03:35,764 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-15 01:03:35,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-02-15 01:03:37,818 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_ULTIMATE.start_insert_top_~top~0#1.offset| (_ bv24 32)))) (and (or (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_44| (_ BitVec 32))) (not (= (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_44|) (_ bv0 1)))) (bvule (bvadd |c_ULTIMATE.start_insert_top_~top~0#1.offset| (_ bv20 32)) .cse0)) (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_44| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_44|) (_ bv0 1))) (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_43| (_ BitVec 32))) (or (= |v_create_sub_list_insert_sub_~sub~0#1.base_43| |c_ULTIMATE.start_insert_top_~top~0#1.base|) (forall ((v_ArrVal_1349 (_ BitVec 32)) (v_ArrVal_1348 (_ BitVec 32))) (bvule .cse0 (select (store (store |c_#length| |v_create_sub_list_insert_sub_~sub~0#1.base_44| v_ArrVal_1349) |v_create_sub_list_insert_sub_~sub~0#1.base_43| v_ArrVal_1348) |c_ULTIMATE.start_insert_top_~top~0#1.base|))))))))) is different from false [2023-02-15 01:03:37,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:03:37,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390838939] [2023-02-15 01:03:37,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390838939] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:03:37,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1759687242] [2023-02-15 01:03:37,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:03:37,827 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-15 01:03:37,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-15 01:03:37,828 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-15 01:03:37,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2023-02-15 01:03:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:03:38,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 01:03:38,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:03:38,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:03:38,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:03:38,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:03:38,833 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:03:38,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:03:39,001 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:03:39,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-15 01:03:39,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-15 01:03:39,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:03:39,532 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:03:39,533 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 15 treesize of output 23 [2023-02-15 01:03:39,552 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:03:39,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:03:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 01:03:39,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:03:40,325 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-15 01:03:40,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-02-15 01:03:47,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1759687242] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:03:47,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 01:03:47,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 21 [2023-02-15 01:03:47,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502770201] [2023-02-15 01:03:47,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 01:03:47,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 01:03:47,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:03:47,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 01:03:47,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=536, Unknown=7, NotChecked=94, Total=702 [2023-02-15 01:03:47,017 INFO L87 Difference]: Start difference. First operand 153 states and 163 transitions. Second operand has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 01:03:49,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 01:03:54,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 01:03:58,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 01:04:00,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 01:04:02,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:04:02,948 INFO L93 Difference]: Finished difference Result 252 states and 278 transitions. [2023-02-15 01:04:02,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 01:04:02,949 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2023-02-15 01:04:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:04:02,950 INFO L225 Difference]: With dead ends: 252 [2023-02-15 01:04:02,950 INFO L226 Difference]: Without dead ends: 252 [2023-02-15 01:04:02,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=115, Invalid=876, Unknown=9, NotChecked=122, Total=1122 [2023-02-15 01:04:02,950 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 199 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 17 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:04:02,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 508 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 938 Invalid, 4 Unknown, 101 Unchecked, 11.0s Time] [2023-02-15 01:04:02,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-02-15 01:04:02,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 155. [2023-02-15 01:04:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 114 states have (on average 1.2894736842105263) internal successors, (147), 137 states have internal predecessors, (147), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-15 01:04:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 166 transitions. [2023-02-15 01:04:02,954 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 166 transitions. Word has length 45 [2023-02-15 01:04:02,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:04:02,954 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 166 transitions. [2023-02-15 01:04:02,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 01:04:02,955 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 166 transitions. [2023-02-15 01:04:02,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 01:04:02,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:04:02,955 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:04:02,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2023-02-15 01:04:03,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-02-15 01:04:03,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:04:03,356 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting list_add_tailErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:04:03,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:04:03,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1768276039, now seen corresponding path program 1 times [2023-02-15 01:04:03,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:04:03,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503965577] [2023-02-15 01:04:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:04:03,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:04:03,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:04:03,358 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:04:03,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-02-15 01:04:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:04:03,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 01:04:03,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:04:03,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:04:03,800 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-15 01:04:03,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-02-15 01:04:03,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-02-15 01:04:03,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:04:04,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:04:04,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-02-15 01:04:04,303 WARN L859 $PredicateComparison]: unable to prove that (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (= |c_#valid| (store |c_old(#valid)| |create_sub_list_insert_sub_~sub~0#1.base| (_ bv1 1)))) is different from true [2023-02-15 01:04:04,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:04:04,494 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-15 01:04:04,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-02-15 01:04:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-02-15 01:04:04,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:04:05,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:04:05,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503965577] [2023-02-15 01:04:05,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503965577] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:04:05,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [410466258] [2023-02-15 01:04:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:04:05,049 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-15 01:04:05,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-15 01:04:05,050 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) [2023-02-15 01:04:05,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2023-02-15 01:04:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:04:06,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 01:04:06,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:04:06,357 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-15 01:04:06,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-02-15 01:04:06,376 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 01:04:06,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:04:06,510 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-02-15 01:04:06,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2023-02-15 01:04:06,679 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-02-15 01:04:06,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2023-02-15 01:04:06,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:04:07,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:04:07,170 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-02-15 01:04:07,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 45 [2023-02-15 01:04:07,233 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-02-15 01:04:07,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2023-02-15 01:04:07,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:04:07,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:04:07,588 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-02-15 01:04:07,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 45 [2023-02-15 01:04:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 01:04:08,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:04:08,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [410466258] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:04:08,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 01:04:08,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-02-15 01:04:08,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949656163] [2023-02-15 01:04:08,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 01:04:08,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 01:04:08,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:04:08,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 01:04:08,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=499, Unknown=12, NotChecked=46, Total=650 [2023-02-15 01:04:08,302 INFO L87 Difference]: Start difference. First operand 155 states and 166 transitions. Second operand has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 01:04:11,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:04:11,784 INFO L93 Difference]: Finished difference Result 258 states and 282 transitions. [2023-02-15 01:04:11,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 01:04:11,785 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2023-02-15 01:04:11,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:04:11,786 INFO L225 Difference]: With dead ends: 258 [2023-02-15 01:04:11,786 INFO L226 Difference]: Without dead ends: 258 [2023-02-15 01:04:11,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=183, Invalid=798, Unknown=15, NotChecked=60, Total=1056 [2023-02-15 01:04:11,787 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 407 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 73 mSolverCounterUnsat, 182 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 182 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-02-15 01:04:11,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 428 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 668 Invalid, 182 Unknown, 147 Unchecked, 2.8s Time] [2023-02-15 01:04:11,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-02-15 01:04:11,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 178. [2023-02-15 01:04:11,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 131 states have (on average 1.3129770992366412) internal successors, (172), 155 states have internal predecessors, (172), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2023-02-15 01:04:11,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 203 transitions. [2023-02-15 01:04:11,799 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 203 transitions. Word has length 51 [2023-02-15 01:04:11,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:04:11,799 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 203 transitions. [2023-02-15 01:04:11,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 01:04:11,799 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 203 transitions. [2023-02-15 01:04:11,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 01:04:11,799 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:04:11,800 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:04:11,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2023-02-15 01:04:12,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-02-15 01:04:12,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:04:12,205 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting list_add_tailErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:04:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:04:12,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1768276040, now seen corresponding path program 1 times [2023-02-15 01:04:12,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:04:12,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064222706] [2023-02-15 01:04:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:04:12,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:04:12,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:04:12,207 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:04:12,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-02-15 01:04:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:04:12,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-15 01:04:12,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:04:12,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:04:12,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:04:12,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:04:12,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 01:04:12,649 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:04:12,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:04:12,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-15 01:04:12,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:04:13,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:04:13,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 01:04:13,175 WARN L859 $PredicateComparison]: unable to prove that (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |create_sub_list_insert_sub_~sub~0#1.base| (_ bv12 32)))) is different from true [2023-02-15 01:04:13,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:04:13,267 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (= (select |c_#length| |create_sub_list_insert_sub_~sub~0#1.base|) (_ bv12 32))) (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |create_sub_list_insert_sub_~sub~0#1.base| (_ bv12 32))))) is different from true [2023-02-15 01:04:13,337 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:04:13,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-02-15 01:04:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-02-15 01:04:13,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:04:14,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:04:14,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064222706] [2023-02-15 01:04:14,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064222706] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:04:14,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [870350312] [2023-02-15 01:04:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:04:14,346 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-15 01:04:14,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-15 01:04:14,347 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-15 01:04:14,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2023-02-15 01:04:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:04:15,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 01:04:15,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:04:15,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:04:15,597 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 01:04:15,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:04:15,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 01:04:15,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-15 01:04:15,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:04:16,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:04:16,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 01:04:16,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-15 01:04:16,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:04:16,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:04:16,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 01:04:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 01:04:16,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:04:18,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [870350312] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:04:18,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 01:04:18,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 19 [2023-02-15 01:04:18,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808782085] [2023-02-15 01:04:18,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 01:04:18,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 01:04:18,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:04:18,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 01:04:18,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=435, Unknown=4, NotChecked=86, Total=600 [2023-02-15 01:04:18,061 INFO L87 Difference]: Start difference. First operand 178 states and 203 transitions. Second operand has 20 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 01:04:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:04:22,279 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2023-02-15 01:04:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 01:04:22,280 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2023-02-15 01:04:22,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:04:22,282 INFO L225 Difference]: With dead ends: 329 [2023-02-15 01:04:22,282 INFO L226 Difference]: Without dead ends: 329 [2023-02-15 01:04:22,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=177, Invalid=941, Unknown=12, NotChecked=130, Total=1260 [2023-02-15 01:04:22,282 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 405 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 36 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:04:22,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 533 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 805 Invalid, 17 Unknown, 381 Unchecked, 3.0s Time] [2023-02-15 01:04:22,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-15 01:04:22,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 220. [2023-02-15 01:04:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 167 states have (on average 1.251497005988024) internal successors, (209), 191 states have internal predecessors, (209), 14 states have call successors, (14), 14 states have call predecessors, (14), 16 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2023-02-15 01:04:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 244 transitions. [2023-02-15 01:04:22,287 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 244 transitions. Word has length 51 [2023-02-15 01:04:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:04:22,287 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 244 transitions. [2023-02-15 01:04:22,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 01:04:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 244 transitions. [2023-02-15 01:04:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 01:04:22,288 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:04:22,288 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:04:22,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-02-15 01:04:22,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2023-02-15 01:04:22,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-02-15 01:04:22,700 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting list_add_tailErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:04:22,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:04:22,700 INFO L85 PathProgramCache]: Analyzing trace with hash 636971300, now seen corresponding path program 2 times [2023-02-15 01:04:22,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:04:22,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468239149] [2023-02-15 01:04:22,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 01:04:22,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:04:22,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:04:22,702 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:04:22,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-02-15 01:04:23,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 01:04:23,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:04:23,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 99 conjunts are in the unsatisfiable core [2023-02-15 01:04:23,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:04:23,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:04:23,403 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:04:23,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:04:23,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:04:23,499 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:04:23,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:04:23,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:04:23,891 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:04:24,026 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:04:24,027 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 22 [2023-02-15 01:04:24,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-15 01:04:24,175 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:04:24,176 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 26 [2023-02-15 01:04:24,177 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 01:04:25,830 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-15 01:04:25,830 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 46 [2023-02-15 01:04:26,018 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 22 [2023-02-15 01:04:26,186 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-15 01:04:26,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-02-15 01:04:26,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-15 01:04:26,377 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2023-02-15 01:04:27,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2023-02-15 01:04:27,941 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2023-02-15 01:04:27,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 46 [2023-02-15 01:04:28,235 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2023-02-15 01:04:28,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2023-02-15 01:04:28,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:04:28,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-02-15 01:04:28,951 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 19 [2023-02-15 01:04:28,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 01:04:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:04:29,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:04:32,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2023-02-15 01:04:32,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-15 01:04:35,893 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 01:04:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468239149] [2023-02-15 01:04:35,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468239149] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:04:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [425747365] [2023-02-15 01:04:35,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 01:04:35,893 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-15 01:04:35,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-15 01:04:35,894 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-15 01:04:35,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2023-02-15 01:04:36,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 01:04:36,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869998293] [2023-02-15 01:04:36,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 01:04:36,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:04:36,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:04:36,426 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:04:36,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 1 [2023-02-15 01:04:36,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-15 01:04:37,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 01:04:37,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:04:37,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 116 conjunts are in the unsatisfiable core [2023-02-15 01:04:37,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:04:37,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:04:37,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:04:38,204 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:04:38,214 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:04:38,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 01:04:38,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:04:38,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:04:38,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:04:38,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:04:38,665 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:04:38,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:04:38,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:04:38,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:04:41,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2023-02-15 01:04:41,218 INFO L321 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2023-02-15 01:04:41,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 117 [2023-02-15 01:04:41,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 89 [2023-02-15 01:04:41,232 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 24 [2023-02-15 01:04:41,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 22 [2023-02-15 01:04:41,349 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-15 01:04:41,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-02-15 01:04:41,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-15 01:04:41,455 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2023-02-15 01:04:43,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2023-02-15 01:04:43,773 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2023-02-15 01:04:43,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 46 [2023-02-15 01:04:43,888 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2023-02-15 01:04:43,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2023-02-15 01:04:44,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-02-15 01:04:44,700 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 19 [2023-02-15 01:04:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:04:44,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:04:48,726 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_68| (_ BitVec 32)) (v_ArrVal_2379 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2378 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_68| v_ArrVal_2378) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_68| v_ArrVal_2379) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))) (_ bv1 1))) (not (= (_ bv0 1) (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_68|))))) is different from false [2023-02-15 01:04:51,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869998293] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:04:51,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 01:04:51,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 55 [2023-02-15 01:04:51,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764496219] [2023-02-15 01:04:51,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 01:04:51,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-15 01:04:51,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 01:04:51,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-15 01:04:51,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=4361, Unknown=104, NotChecked=134, Total=4830 [2023-02-15 01:04:51,619 INFO L87 Difference]: Start difference. First operand 220 states and 244 transitions. Second operand has 56 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 49 states have internal predecessors, (76), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 01:05:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:05:17,746 INFO L93 Difference]: Finished difference Result 221 states and 243 transitions. [2023-02-15 01:05:17,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-15 01:05:17,746 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 49 states have internal predecessors, (76), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 51 [2023-02-15 01:05:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:05:17,753 INFO L225 Difference]: With dead ends: 221 [2023-02-15 01:05:17,753 INFO L226 Difference]: Without dead ends: 221 [2023-02-15 01:05:17,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=687, Invalid=9232, Unknown=185, NotChecked=198, Total=10302 [2023-02-15 01:05:17,755 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 127 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 44 mSolverCounterUnsat, 74 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 74 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-02-15 01:05:17,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1432 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2137 Invalid, 74 Unknown, 0 Unchecked, 10.4s Time] [2023-02-15 01:05:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-15 01:05:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2023-02-15 01:05:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 167 states have (on average 1.2455089820359282) internal successors, (208), 191 states have internal predecessors, (208), 14 states have call successors, (14), 14 states have call predecessors, (14), 16 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2023-02-15 01:05:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 243 transitions. [2023-02-15 01:05:17,765 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 243 transitions. Word has length 51 [2023-02-15 01:05:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:05:17,765 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 243 transitions. [2023-02-15 01:05:17,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 49 states have internal predecessors, (76), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 01:05:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 243 transitions. [2023-02-15 01:05:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 01:05:17,766 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:05:17,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:05:17,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-02-15 01:05:17,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-15 01:05:18,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:05:18,186 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-02-15 01:05:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:05:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 636971301, now seen corresponding path program 2 times [2023-02-15 01:05:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 01:05:18,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338711948] [2023-02-15 01:05:18,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 01:05:18,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 01:05:18,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 01:05:18,188 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 01:05:18,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-02-15 01:05:18,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 01:05:18,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:05:18,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 122 conjunts are in the unsatisfiable core [2023-02-15 01:05:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:05:18,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-15 01:05:18,939 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:05:18,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:05:18,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 01:05:19,008 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 01:05:19,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-15 01:05:19,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:05:19,370 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:05:19,484 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:05:19,484 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 22 [2023-02-15 01:05:19,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-15 01:05:19,628 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:05:19,629 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 26 [2023-02-15 01:05:19,631 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 01:05:20,395 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-15 01:05:20,396 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 46 [2023-02-15 01:05:20,602 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 22 [2023-02-15 01:05:20,782 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-15 01:05:20,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-02-15 01:05:20,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:05:21,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-15 01:05:21,109 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2023-02-15 01:05:21,809 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-15 01:05:22,065 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:05:22,066 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 22 [2023-02-15 01:05:22,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-15 01:05:22,388 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:05:22,389 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 26 [2023-02-15 01:05:22,390 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 01:05:22,686 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 01:05:22,687 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 38 [2023-02-15 01:05:22,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-15 01:05:23,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 39 [2023-02-15 01:05:23,193 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2023-02-15 01:05:23,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 75 [2023-02-15 01:05:23,549 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-02-15 01:05:23,550 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 26 [2023-02-15 01:05:23,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:05:23,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2023-02-15 01:05:23,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 01:05:24,413 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 17 [2023-02-15 01:05:24,439 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 01:05:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:05:24,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:05:28,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 01:05:28,206 INFO L350 Elim1Store]: Elim1 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 71 treesize of output 60 [2023-02-15 01:05:28,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 01:05:28,253 INFO L350 Elim1Store]: Elim1 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 1710 treesize of output 1619 [2023-02-15 01:05:28,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 801 treesize of output 737 [2023-02-15 01:05:28,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1538 treesize of output 1410 [2023-02-15 01:05:28,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1410 treesize of output 1154