./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 3dbbec33 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-?-3dbbec3 [2023-02-14 13:18:48,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 13:18:48,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 13:18:48,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 13:18:48,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 13:18:48,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 13:18:48,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 13:18:48,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 13:18:48,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 13:18:48,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 13:18:48,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 13:18:48,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 13:18:48,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 13:18:48,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 13:18:48,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 13:18:48,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 13:18:48,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 13:18:48,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 13:18:48,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 13:18:48,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 13:18:48,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 13:18:48,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 13:18:48,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 13:18:48,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 13:18:48,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 13:18:48,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 13:18:48,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 13:18:48,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 13:18:48,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 13:18:48,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 13:18:48,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 13:18:48,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 13:18:48,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 13:18:48,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 13:18:48,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 13:18:48,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 13:18:48,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 13:18:48,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 13:18:48,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 13:18:48,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 13:18:48,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 13:18:48,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-14 13:18:48,454 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 13:18:48,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 13:18:48,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 13:18:48,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 13:18:48,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 13:18:48,456 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 13:18:48,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 13:18:48,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 13:18:48,456 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 13:18:48,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 13:18:48,457 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 13:18:48,457 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-14 13:18:48,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 13:18:48,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 13:18:48,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 13:18:48,458 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-14 13:18:48,458 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-14 13:18:48,458 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-14 13:18:48,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 13:18:48,458 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-14 13:18:48,458 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 13:18:48,459 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 13:18:48,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 13:18:48,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 13:18:48,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 13:18:48,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:18:48,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 13:18:48,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 13:18:48,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 13:18:48,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 13:18:48,460 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 13:18:48,460 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 13:18:48,461 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 13:18:48,461 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 13:18:48,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 [2023-02-14 13:18:48,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 13:18:48,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 13:18:48,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 13:18:48,649 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 13:18:48,649 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 13:18:48,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0102-2.i [2023-02-14 13:18:49,600 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 13:18:49,811 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 13:18:49,811 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0102-2.i [2023-02-14 13:18:49,827 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc2c2a40c/70cfc30c34a448deaf8d0f77dd444f49/FLAGb9fd34b27 [2023-02-14 13:18:49,836 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc2c2a40c/70cfc30c34a448deaf8d0f77dd444f49 [2023-02-14 13:18:49,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 13:18:49,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 13:18:49,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 13:18:49,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 13:18:49,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 13:18:49,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:18:49" (1/1) ... [2023-02-14 13:18:49,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ce22470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:49, skipping insertion in model container [2023-02-14 13:18:49,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:18:49" (1/1) ... [2023-02-14 13:18:49,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 13:18:49,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:18:50,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:18:50,119 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) [2023-02-14 13:18:50,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@72af10cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:50, skipping insertion in model container [2023-02-14 13:18:50,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 13:18:50,121 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-02-14 13:18:50,122 INFO L158 Benchmark]: Toolchain (without parser) took 282.58ms. Allocated memory is still 140.5MB. Free memory was 110.4MB in the beginning and 97.8MB in the end (delta: 12.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-14 13:18:50,123 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 111.1MB. Free memory is still 75.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-14 13:18:50,124 INFO L158 Benchmark]: CACSL2BoogieTranslator took 281.14ms. Allocated memory is still 140.5MB. Free memory was 109.6MB in the beginning and 97.8MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-14 13:18:50,125 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 111.1MB. Free memory is still 75.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 281.14ms. Allocated memory is still 140.5MB. Free memory was 109.6MB in the beginning and 97.8MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. 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-?-3dbbec3 [2023-02-14 13:18:51,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 13:18:51,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 13:18:51,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 13:18:51,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 13:18:51,719 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 13:18:51,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 13:18:51,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 13:18:51,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 13:18:51,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 13:18:51,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 13:18:51,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 13:18:51,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 13:18:51,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 13:18:51,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 13:18:51,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 13:18:51,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 13:18:51,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 13:18:51,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 13:18:51,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 13:18:51,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 13:18:51,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 13:18:51,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 13:18:51,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 13:18:51,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 13:18:51,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 13:18:51,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 13:18:51,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 13:18:51,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 13:18:51,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 13:18:51,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 13:18:51,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 13:18:51,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 13:18:51,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 13:18:51,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 13:18:51,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 13:18:51,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 13:18:51,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 13:18:51,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 13:18:51,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 13:18:51,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 13:18:51,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-02-14 13:18:51,807 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 13:18:51,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 13:18:51,808 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 13:18:51,808 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 13:18:51,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 13:18:51,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 13:18:51,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 13:18:51,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 13:18:51,810 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 13:18:51,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 13:18:51,811 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 13:18:51,811 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-14 13:18:51,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 13:18:51,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 13:18:51,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 13:18:51,811 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-14 13:18:51,812 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-14 13:18:51,812 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-14 13:18:51,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 13:18:51,812 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-14 13:18:51,812 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-14 13:18:51,812 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-14 13:18:51,812 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 13:18:51,813 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 13:18:51,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 13:18:51,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 13:18:51,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 13:18:51,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:18:51,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 13:18:51,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 13:18:51,814 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-14 13:18:51,814 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-14 13:18:51,814 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 13:18:51,814 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 13:18:51,814 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 13:18:51,815 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-14 13:18:51,815 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 13:18:51,815 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 [2023-02-14 13:18:52,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 13:18:52,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 13:18:52,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 13:18:52,073 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 13:18:52,073 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 13:18:52,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0102-2.i [2023-02-14 13:18:53,163 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 13:18:53,320 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 13:18:53,323 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0102-2.i [2023-02-14 13:18:53,336 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0dbebddd/2b8de1244f9e4e6ab9848b62dbbc3601/FLAG9defba005 [2023-02-14 13:18:53,346 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0dbebddd/2b8de1244f9e4e6ab9848b62dbbc3601 [2023-02-14 13:18:53,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 13:18:53,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 13:18:53,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 13:18:53,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 13:18:53,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 13:18:53,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:18:53" (1/1) ... [2023-02-14 13:18:53,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fbafcc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:53, skipping insertion in model container [2023-02-14 13:18:53,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:18:53" (1/1) ... [2023-02-14 13:18:53,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 13:18:53,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:18:53,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:18:53,622 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-02-14 13:18:53,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:18:53,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:18:53,665 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 13:18:53,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:18:53,721 INFO L208 MainTranslator]: Completed translation [2023-02-14 13:18:53,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:53 WrapperNode [2023-02-14 13:18:53,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 13:18:53,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 13:18:53,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 13:18:53,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 13:18:53,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:53" (1/1) ... [2023-02-14 13:18:53,738 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:53" (1/1) ... [2023-02-14 13:18:53,752 INFO L138 Inliner]: procedures = 136, calls = 37, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 101 [2023-02-14 13:18:53,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 13:18:53,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 13:18:53,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 13:18:53,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 13:18:53,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:53" (1/1) ... [2023-02-14 13:18:53,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:53" (1/1) ... [2023-02-14 13:18:53,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:53" (1/1) ... [2023-02-14 13:18:53,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:53" (1/1) ... [2023-02-14 13:18:53,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:53" (1/1) ... [2023-02-14 13:18:53,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:53" (1/1) ... [2023-02-14 13:18:53,785 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:53" (1/1) ... [2023-02-14 13:18:53,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:53" (1/1) ... [2023-02-14 13:18:53,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 13:18:53,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 13:18:53,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 13:18:53,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 13:18:53,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:53" (1/1) ... [2023-02-14 13:18:53,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:18:53,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:18:53,819 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) [2023-02-14 13:18:53,830 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 [2023-02-14 13:18:53,846 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2023-02-14 13:18:53,846 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2023-02-14 13:18:53,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 13:18:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 13:18:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure create_sub_list [2023-02-14 13:18:53,850 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sub_list [2023-02-14 13:18:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 13:18:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 13:18:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 13:18:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-02-14 13:18:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 13:18:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-14 13:18:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-14 13:18:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 13:18:53,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 13:18:53,988 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 13:18:53,997 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 13:18:54,314 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 13:18:54,320 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 13:18:54,322 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-14 13:18:54,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:18:54 BoogieIcfgContainer [2023-02-14 13:18:54,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 13:18:54,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 13:18:54,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 13:18:54,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 13:18:54,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:18:53" (1/3) ... [2023-02-14 13:18:54,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e85849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:18:54, skipping insertion in model container [2023-02-14 13:18:54,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:18:53" (2/3) ... [2023-02-14 13:18:54,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e85849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:18:54, skipping insertion in model container [2023-02-14 13:18:54,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:18:54" (3/3) ... [2023-02-14 13:18:54,330 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0102-2.i [2023-02-14 13:18:54,342 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 13:18:54,343 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2023-02-14 13:18:54,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 13:18:54,400 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;@3b3159da, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 13:18:54,400 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-02-14 13:18:54,403 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) [2023-02-14 13:18:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-14 13:18:54,408 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:18:54,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-14 13:18:54,409 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)] === [2023-02-14 13:18:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:18:54,414 INFO L85 PathProgramCache]: Analyzing trace with hash 60205689, now seen corresponding path program 1 times [2023-02-14 13:18:54,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:18:54,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702256509] [2023-02-14 13:18:54,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:18:54,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 13:18:54,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:18:54,426 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) [2023-02-14 13:18:54,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-02-14 13:18:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:18:54,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 13:18:54,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:18:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:18:54,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:18:54,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:18:54,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702256509] [2023-02-14 13:18:54,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702256509] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:18:54,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:18:54,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 13:18:54,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903782427] [2023-02-14 13:18:54,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:18:54,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 13:18:54,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:18:54,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 13:18:54,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 13:18:54,532 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) [2023-02-14 13:18:54,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:18:54,553 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2023-02-14 13:18:54,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 13:18:54,554 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 [2023-02-14 13:18:54,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:18:54,560 INFO L225 Difference]: With dead ends: 83 [2023-02-14 13:18:54,560 INFO L226 Difference]: Without dead ends: 81 [2023-02-14 13:18:54,561 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 [2023-02-14 13:18:54,564 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 [2023-02-14 13:18:54,565 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] [2023-02-14 13:18:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-14 13:18:54,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-02-14 13:18:54,596 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) [2023-02-14 13:18:54,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2023-02-14 13:18:54,600 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 5 [2023-02-14 13:18:54,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:18:54,601 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2023-02-14 13:18:54,601 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) [2023-02-14 13:18:54,601 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2023-02-14 13:18:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 13:18:54,602 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:18:54,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:18:54,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-02-14 13:18:54,811 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 [2023-02-14 13:18:54,811 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)] === [2023-02-14 13:18:54,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:18:54,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2005144647, now seen corresponding path program 1 times [2023-02-14 13:18:54,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:18:54,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349839052] [2023-02-14 13:18:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:18:54,813 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 [2023-02-14 13:18:54,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:18:54,814 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) [2023-02-14 13:18:54,815 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 [2023-02-14 13:18:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:18:54,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 13:18:54,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:18:54,961 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 [2023-02-14 13:18:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:18:55,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:18:55,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:18:55,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349839052] [2023-02-14 13:18:55,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349839052] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:18:55,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:18:55,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 13:18:55,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44329694] [2023-02-14 13:18:55,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:18:55,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:18:55,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:18:55,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:18:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:18:55,015 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) [2023-02-14 13:18:55,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:18:55,234 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2023-02-14 13:18:55,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:18:55,236 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 [2023-02-14 13:18:55,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:18:55,237 INFO L225 Difference]: With dead ends: 108 [2023-02-14 13:18:55,237 INFO L226 Difference]: Without dead ends: 108 [2023-02-14 13:18:55,237 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 [2023-02-14 13:18:55,237 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 60 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-02-14 13:18:55,238 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] [2023-02-14 13:18:55,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-14 13:18:55,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 79. [2023-02-14 13:18:55,246 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) [2023-02-14 13:18:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2023-02-14 13:18:55,248 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 7 [2023-02-14 13:18:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:18:55,248 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2023-02-14 13:18:55,248 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) [2023-02-14 13:18:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2023-02-14 13:18:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 13:18:55,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:18:55,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:18:55,258 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 [2023-02-14 13:18:55,449 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 [2023-02-14 13:18:55,449 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)] === [2023-02-14 13:18:55,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:18:55,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2005144648, now seen corresponding path program 1 times [2023-02-14 13:18:55,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:18:55,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022615987] [2023-02-14 13:18:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:18:55,450 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 [2023-02-14 13:18:55,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:18:55,452 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) [2023-02-14 13:18:55,454 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 [2023-02-14 13:18:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:18:55,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 13:18:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:18:55,505 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 [2023-02-14 13:18:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:18:55,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:18:55,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:18:55,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022615987] [2023-02-14 13:18:55,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022615987] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:18:55,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:18:55,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 13:18:55,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319515063] [2023-02-14 13:18:55,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:18:55,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:18:55,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:18:55,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:18:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:18:55,554 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) [2023-02-14 13:18:55,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:18:55,725 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2023-02-14 13:18:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:18:55,726 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 [2023-02-14 13:18:55,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:18:55,726 INFO L225 Difference]: With dead ends: 83 [2023-02-14 13:18:55,726 INFO L226 Difference]: Without dead ends: 83 [2023-02-14 13:18:55,726 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 [2023-02-14 13:18:55,727 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 5 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:18:55,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 234 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:18:55,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-14 13:18:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2023-02-14 13:18:55,731 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) [2023-02-14 13:18:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2023-02-14 13:18:55,732 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 7 [2023-02-14 13:18:55,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:18:55,732 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2023-02-14 13:18:55,733 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) [2023-02-14 13:18:55,733 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2023-02-14 13:18:55,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 13:18:55,733 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:18:55,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:18:55,740 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 [2023-02-14 13:18:55,940 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 [2023-02-14 13:18:55,940 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)] === [2023-02-14 13:18:55,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:18:55,940 INFO L85 PathProgramCache]: Analyzing trace with hash 859208239, now seen corresponding path program 1 times [2023-02-14 13:18:55,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:18:55,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39676676] [2023-02-14 13:18:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:18:55,941 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 [2023-02-14 13:18:55,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:18:55,977 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) [2023-02-14 13:18:55,978 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 [2023-02-14 13:18:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:18:56,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 13:18:56,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:18:56,075 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 [2023-02-14 13:18:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:18:56,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:18:56,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:18:56,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39676676] [2023-02-14 13:18:56,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39676676] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:18:56,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:18:56,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 13:18:56,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402822866] [2023-02-14 13:18:56,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:18:56,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 13:18:56,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:18:56,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 13:18:56,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 13:18:56,085 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) [2023-02-14 13:18:56,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:18:56,169 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2023-02-14 13:18:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 13:18:56,170 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 [2023-02-14 13:18:56,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:18:56,170 INFO L225 Difference]: With dead ends: 82 [2023-02-14 13:18:56,170 INFO L226 Difference]: Without dead ends: 82 [2023-02-14 13:18:56,170 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 [2023-02-14 13:18:56,171 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 [2023-02-14 13:18:56,171 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] [2023-02-14 13:18:56,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-14 13:18:56,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2023-02-14 13:18:56,174 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) [2023-02-14 13:18:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2023-02-14 13:18:56,175 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 11 [2023-02-14 13:18:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:18:56,175 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2023-02-14 13:18:56,175 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) [2023-02-14 13:18:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2023-02-14 13:18:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 13:18:56,175 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:18:56,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:18:56,193 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 [2023-02-14 13:18:56,376 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 [2023-02-14 13:18:56,376 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)] === [2023-02-14 13:18:56,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:18:56,376 INFO L85 PathProgramCache]: Analyzing trace with hash 859208240, now seen corresponding path program 1 times [2023-02-14 13:18:56,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:18:56,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414832513] [2023-02-14 13:18:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:18:56,377 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 [2023-02-14 13:18:56,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:18:56,378 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) [2023-02-14 13:18:56,380 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 [2023-02-14 13:18:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:18:56,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 13:18:56,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:18:56,447 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 [2023-02-14 13:18:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:18:56,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:18:56,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:18:56,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414832513] [2023-02-14 13:18:56,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414832513] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:18:56,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:18:56,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 13:18:56,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734016725] [2023-02-14 13:18:56,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:18:56,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 13:18:56,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:18:56,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 13:18:56,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 13:18:56,464 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) [2023-02-14 13:18:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:18:56,569 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2023-02-14 13:18:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 13:18:56,569 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 [2023-02-14 13:18:56,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:18:56,570 INFO L225 Difference]: With dead ends: 81 [2023-02-14 13:18:56,570 INFO L226 Difference]: Without dead ends: 81 [2023-02-14 13:18:56,570 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 [2023-02-14 13:18:56,571 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 [2023-02-14 13:18:56,571 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] [2023-02-14 13:18:56,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-14 13:18:56,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2023-02-14 13:18:56,577 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) [2023-02-14 13:18:56,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2023-02-14 13:18:56,577 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 11 [2023-02-14 13:18:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:18:56,578 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2023-02-14 13:18:56,578 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) [2023-02-14 13:18:56,578 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2023-02-14 13:18:56,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 13:18:56,578 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:18:56,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:18:56,589 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 [2023-02-14 13:18:56,785 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 [2023-02-14 13:18:56,785 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)] === [2023-02-14 13:18:56,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:18:56,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1332328513, now seen corresponding path program 1 times [2023-02-14 13:18:56,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:18:56,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157416078] [2023-02-14 13:18:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:18:56,786 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 [2023-02-14 13:18:56,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:18:56,787 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) [2023-02-14 13:18:56,789 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 [2023-02-14 13:18:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:18:56,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 13:18:56,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:18:56,867 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 [2023-02-14 13:18:56,902 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-14 13:18:56,903 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 [2023-02-14 13:18:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:18:56,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:18:56,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:18:56,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157416078] [2023-02-14 13:18:56,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157416078] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:18:56,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:18:56,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 13:18:56,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289320582] [2023-02-14 13:18:56,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:18:56,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 13:18:56,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:18:56,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 13:18:56,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-14 13:18:56,935 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) [2023-02-14 13:18:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:18:57,247 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2023-02-14 13:18:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:18:57,248 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 [2023-02-14 13:18:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:18:57,248 INFO L225 Difference]: With dead ends: 129 [2023-02-14 13:18:57,248 INFO L226 Difference]: Without dead ends: 129 [2023-02-14 13:18:57,249 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 [2023-02-14 13:18:57,249 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 [2023-02-14 13:18:57,249 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] [2023-02-14 13:18:57,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-14 13:18:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 90. [2023-02-14 13:18:57,252 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) [2023-02-14 13:18:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2023-02-14 13:18:57,253 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 14 [2023-02-14 13:18:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:18:57,253 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2023-02-14 13:18:57,253 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) [2023-02-14 13:18:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2023-02-14 13:18:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-14 13:18:57,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:18:57,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:18:57,263 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 [2023-02-14 13:18:57,457 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 [2023-02-14 13:18:57,457 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)] === [2023-02-14 13:18:57,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:18:57,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1332328512, now seen corresponding path program 1 times [2023-02-14 13:18:57,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:18:57,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663277052] [2023-02-14 13:18:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:18:57,458 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 [2023-02-14 13:18:57,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:18:57,459 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) [2023-02-14 13:18:57,460 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 [2023-02-14 13:18:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:18:57,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-14 13:18:57,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:18:57,557 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 [2023-02-14 13:18:57,561 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 [2023-02-14 13:18:57,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:18:57,676 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 12 treesize of output 14 [2023-02-14 13:18:57,687 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:18:57,688 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 [2023-02-14 13:18:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:18:57,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:18:57,753 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:18:57,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663277052] [2023-02-14 13:18:57,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663277052] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:18:57,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:18:57,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 13:18:57,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700953489] [2023-02-14 13:18:57,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:18:57,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 13:18:57,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:18:57,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 13:18:57,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-14 13:18:57,755 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) [2023-02-14 13:18:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:18:58,150 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2023-02-14 13:18:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 13:18:58,150 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 [2023-02-14 13:18:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:18:58,151 INFO L225 Difference]: With dead ends: 117 [2023-02-14 13:18:58,151 INFO L226 Difference]: Without dead ends: 117 [2023-02-14 13:18:58,151 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 [2023-02-14 13:18:58,152 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 [2023-02-14 13:18:58,152 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] [2023-02-14 13:18:58,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-14 13:18:58,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 108. [2023-02-14 13:18:58,158 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) [2023-02-14 13:18:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2023-02-14 13:18:58,158 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 14 [2023-02-14 13:18:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:18:58,159 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2023-02-14 13:18:58,159 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) [2023-02-14 13:18:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2023-02-14 13:18:58,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 13:18:58,159 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:18:58,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:18:58,167 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 [2023-02-14 13:18:58,365 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 [2023-02-14 13:18:58,365 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)] === [2023-02-14 13:18:58,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:18:58,365 INFO L85 PathProgramCache]: Analyzing trace with hash -467443808, now seen corresponding path program 1 times [2023-02-14 13:18:58,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:18:58,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107920926] [2023-02-14 13:18:58,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:18:58,366 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 [2023-02-14 13:18:58,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:18:58,367 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) [2023-02-14 13:18:58,368 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 [2023-02-14 13:18:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:18:58,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 13:18:58,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:18:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:18:58,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:18:58,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:18:58,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107920926] [2023-02-14 13:18:58,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107920926] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:18:58,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:18:58,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 13:18:58,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162881582] [2023-02-14 13:18:58,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:18:58,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 13:18:58,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:18:58,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 13:18:58,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 13:18:58,455 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) [2023-02-14 13:18:58,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:18:58,532 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2023-02-14 13:18:58,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 13:18:58,534 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 [2023-02-14 13:18:58,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:18:58,534 INFO L225 Difference]: With dead ends: 107 [2023-02-14 13:18:58,534 INFO L226 Difference]: Without dead ends: 107 [2023-02-14 13:18:58,535 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 [2023-02-14 13:18:58,535 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 [2023-02-14 13:18:58,535 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] [2023-02-14 13:18:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-14 13:18:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-02-14 13:18:58,538 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) [2023-02-14 13:18:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2023-02-14 13:18:58,539 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 16 [2023-02-14 13:18:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:18:58,539 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2023-02-14 13:18:58,539 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) [2023-02-14 13:18:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2023-02-14 13:18:58,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 13:18:58,539 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:18:58,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:18:58,553 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 [2023-02-14 13:18:58,749 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 [2023-02-14 13:18:58,749 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)] === [2023-02-14 13:18:58,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:18:58,752 INFO L85 PathProgramCache]: Analyzing trace with hash -467443807, now seen corresponding path program 1 times [2023-02-14 13:18:58,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:18:58,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439954176] [2023-02-14 13:18:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:18:58,752 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 [2023-02-14 13:18:58,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:18:58,761 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) [2023-02-14 13:18:58,762 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 [2023-02-14 13:18:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:18:58,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 13:18:58,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:18:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:18:58,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:18:58,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:18:58,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439954176] [2023-02-14 13:18:58,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439954176] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:18:58,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:18:58,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 13:18:58,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837282276] [2023-02-14 13:18:58,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:18:58,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 13:18:58,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:18:58,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 13:18:58,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-02-14 13:18:58,914 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) [2023-02-14 13:18:59,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:18:59,183 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2023-02-14 13:18:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 13:18:59,184 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 [2023-02-14 13:18:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:18:59,184 INFO L225 Difference]: With dead ends: 115 [2023-02-14 13:18:59,184 INFO L226 Difference]: Without dead ends: 115 [2023-02-14 13:18:59,184 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 [2023-02-14 13:18:59,185 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 [2023-02-14 13:18:59,185 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] [2023-02-14 13:18:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-14 13:18:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2023-02-14 13:18:59,187 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) [2023-02-14 13:18:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2023-02-14 13:18:59,188 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 16 [2023-02-14 13:18:59,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:18:59,188 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2023-02-14 13:18:59,188 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) [2023-02-14 13:18:59,188 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2023-02-14 13:18:59,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-14 13:18:59,189 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:18:59,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:18:59,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-02-14 13:18:59,396 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 [2023-02-14 13:18:59,396 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)] === [2023-02-14 13:18:59,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:18:59,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1605856063, now seen corresponding path program 1 times [2023-02-14 13:18:59,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:18:59,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478322017] [2023-02-14 13:18:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:18:59,397 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 [2023-02-14 13:18:59,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:18:59,398 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) [2023-02-14 13:18:59,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-02-14 13:18:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:18:59,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 13:18:59,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:18:59,483 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 [2023-02-14 13:18:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:18:59,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:18:59,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:18:59,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478322017] [2023-02-14 13:18:59,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478322017] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:18:59,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:18:59,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 13:18:59,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335862922] [2023-02-14 13:18:59,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:18:59,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 13:18:59,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:18:59,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 13:18:59,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:18:59,512 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) [2023-02-14 13:18:59,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:18:59,705 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2023-02-14 13:18:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:18:59,706 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 [2023-02-14 13:18:59,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:18:59,706 INFO L225 Difference]: With dead ends: 114 [2023-02-14 13:18:59,706 INFO L226 Difference]: Without dead ends: 114 [2023-02-14 13:18:59,707 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 [2023-02-14 13:18:59,707 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 [2023-02-14 13:18:59,707 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] [2023-02-14 13:18:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-14 13:18:59,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2023-02-14 13:18:59,709 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) [2023-02-14 13:18:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2023-02-14 13:18:59,710 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 17 [2023-02-14 13:18:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:18:59,710 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2023-02-14 13:18:59,710 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) [2023-02-14 13:18:59,711 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2023-02-14 13:18:59,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-14 13:18:59,711 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:18:59,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:18:59,718 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 [2023-02-14 13:18:59,917 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 [2023-02-14 13:18:59,917 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)] === [2023-02-14 13:18:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:18:59,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1605856062, now seen corresponding path program 1 times [2023-02-14 13:18:59,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:18:59,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922909484] [2023-02-14 13:18:59,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:18:59,918 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 [2023-02-14 13:18:59,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:18:59,919 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) [2023-02-14 13:18:59,919 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 [2023-02-14 13:18:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:19:00,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 13:19:00,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:19:00,016 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 [2023-02-14 13:19:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:19:00,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:19:00,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:19:00,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922909484] [2023-02-14 13:19:00,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922909484] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:19:00,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:19:00,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 13:19:00,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087199454] [2023-02-14 13:19:00,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:19:00,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 13:19:00,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:19:00,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 13:19:00,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:19:00,079 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) [2023-02-14 13:19:00,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:19:00,312 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2023-02-14 13:19:00,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 13:19:00,313 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 [2023-02-14 13:19:00,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:19:00,313 INFO L225 Difference]: With dead ends: 112 [2023-02-14 13:19:00,314 INFO L226 Difference]: Without dead ends: 112 [2023-02-14 13:19:00,314 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 [2023-02-14 13:19:00,314 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 [2023-02-14 13:19:00,314 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] [2023-02-14 13:19:00,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-14 13:19:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2023-02-14 13:19:00,316 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) [2023-02-14 13:19:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2023-02-14 13:19:00,317 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 17 [2023-02-14 13:19:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:19:00,317 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2023-02-14 13:19:00,317 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) [2023-02-14 13:19:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2023-02-14 13:19:00,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 13:19:00,318 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:19:00,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:19:00,328 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 (12)] Ended with exit code 0 [2023-02-14 13:19:00,528 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 [2023-02-14 13:19:00,528 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)] === [2023-02-14 13:19:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:19:00,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1334414076, now seen corresponding path program 1 times [2023-02-14 13:19:00,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:19:00,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945094945] [2023-02-14 13:19:00,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:19:00,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 13:19:00,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:19:00,530 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) [2023-02-14 13:19:00,532 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 [2023-02-14 13:19:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:19:00,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-14 13:19:00,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:19:00,684 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 [2023-02-14 13:19:00,706 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 [2023-02-14 13:19:00,744 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 [2023-02-14 13:19:00,766 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:19:00,767 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 [2023-02-14 13:19:00,806 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 [2023-02-14 13:19:00,855 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 [2023-02-14 13:19:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:19:00,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:19:00,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:19:00,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945094945] [2023-02-14 13:19:00,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945094945] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:19:00,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:19:00,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-14 13:19:00,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966972040] [2023-02-14 13:19:00,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:19:00,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 13:19:00,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:19:00,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 13:19:00,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-14 13:19:00,886 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) [2023-02-14 13:19:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:19:01,459 INFO L93 Difference]: Finished difference Result 162 states and 177 transitions. [2023-02-14 13:19:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 13:19:01,460 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 [2023-02-14 13:19:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:19:01,461 INFO L225 Difference]: With dead ends: 162 [2023-02-14 13:19:01,462 INFO L226 Difference]: Without dead ends: 162 [2023-02-14 13:19:01,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-02-14 13:19:01,462 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, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:19:01,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 356 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 13:19:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-14 13:19:01,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 128. [2023-02-14 13:19:01,465 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) [2023-02-14 13:19:01,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2023-02-14 13:19:01,466 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 19 [2023-02-14 13:19:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:19:01,466 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2023-02-14 13:19:01,466 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) [2023-02-14 13:19:01,466 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2023-02-14 13:19:01,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 13:19:01,466 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:19:01,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:19:01,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-02-14 13:19:01,667 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 [2023-02-14 13:19:01,667 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)] === [2023-02-14 13:19:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:19:01,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1334414075, now seen corresponding path program 1 times [2023-02-14 13:19:01,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:19:01,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133889812] [2023-02-14 13:19:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:19:01,668 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 [2023-02-14 13:19:01,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:19:01,669 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) [2023-02-14 13:19:01,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-02-14 13:19:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:19:01,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 13:19:01,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:19:01,819 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 [2023-02-14 13:19:01,823 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 [2023-02-14 13:19:01,873 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 [2023-02-14 13:19:01,878 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 [2023-02-14 13:19:01,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:01,904 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 [2023-02-14 13:19:01,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:01,937 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 [2023-02-14 13:19:01,961 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:19:01,962 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 [2023-02-14 13:19:01,969 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 [2023-02-14 13:19:02,010 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 [2023-02-14 13:19:02,016 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 [2023-02-14 13:19:02,088 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 [2023-02-14 13:19:02,091 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 [2023-02-14 13:19:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:19:02,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:19:02,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:19:02,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133889812] [2023-02-14 13:19:02,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133889812] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:19:02,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:19:02,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-14 13:19:02,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227278406] [2023-02-14 13:19:02,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:19:02,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 13:19:02,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:19:02,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 13:19:02,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-14 13:19:02,137 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) [2023-02-14 13:19:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:19:02,812 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2023-02-14 13:19:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 13:19:02,813 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 [2023-02-14 13:19:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:19:02,814 INFO L225 Difference]: With dead ends: 131 [2023-02-14 13:19:02,814 INFO L226 Difference]: Without dead ends: 131 [2023-02-14 13:19:02,815 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 [2023-02-14 13:19:02,815 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 [2023-02-14 13:19:02,815 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] [2023-02-14 13:19:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-14 13:19:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-02-14 13:19:02,817 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) [2023-02-14 13:19:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2023-02-14 13:19:02,818 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 19 [2023-02-14 13:19:02,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:19:02,818 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2023-02-14 13:19:02,818 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) [2023-02-14 13:19:02,818 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2023-02-14 13:19:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 13:19:02,819 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:19:02,819 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] [2023-02-14 13:19:02,829 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 [2023-02-14 13:19:03,019 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 [2023-02-14 13:19:03,019 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)] === [2023-02-14 13:19:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:19:03,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1965497160, now seen corresponding path program 1 times [2023-02-14 13:19:03,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:19:03,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803724716] [2023-02-14 13:19:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:19:03,020 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 [2023-02-14 13:19:03,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:19:03,021 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) [2023-02-14 13:19:03,023 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 [2023-02-14 13:19:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:19:03,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 13:19:03,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:19:03,180 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 [2023-02-14 13:19:03,183 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 [2023-02-14 13:19:03,229 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 [2023-02-14 13:19:03,267 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 [2023-02-14 13:19:03,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:03,314 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 [2023-02-14 13:19:03,320 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:19:03,320 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 [2023-02-14 13:19:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:19:03,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:19:05,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:19:05,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803724716] [2023-02-14 13:19:05,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803724716] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:19:05,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2071513980] [2023-02-14 13:19:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:19:05,710 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-14 13:19:05,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-14 13:19:05,711 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) [2023-02-14 13:19:05,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-02-14 13:19:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:19:06,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-14 13:19:06,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:19:06,018 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 [2023-02-14 13:19:06,022 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 [2023-02-14 13:19:06,144 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 [2023-02-14 13:19:06,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:06,348 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 [2023-02-14 13:19:06,357 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:19:06,357 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 [2023-02-14 13:19:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:19:06,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:19:06,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2071513980] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:19:06,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:19:06,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 13 [2023-02-14 13:19:06,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210091995] [2023-02-14 13:19:06,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:19:06,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 13:19:06,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:19:06,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 13:19:06,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=261, Unknown=5, NotChecked=32, Total=342 [2023-02-14 13:19:06,870 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) [2023-02-14 13:19:09,433 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] [2023-02-14 13:19:13,491 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] [2023-02-14 13:19:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:19:15,900 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2023-02-14 13:19:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 13:19:15,901 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 [2023-02-14 13:19:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:19:15,902 INFO L225 Difference]: With dead ends: 146 [2023-02-14 13:19:15,902 INFO L226 Difference]: Without dead ends: 146 [2023-02-14 13:19:15,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=80, Invalid=469, Unknown=7, NotChecked=44, Total=600 [2023-02-14 13:19:15,903 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 65 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s 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, 4.7s IncrementalHoareTripleChecker+Time [2023-02-14 13:19:15,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 394 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 412 Invalid, 2 Unknown, 90 Unchecked, 4.7s Time] [2023-02-14 13:19:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-14 13:19:15,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2023-02-14 13:19:15,905 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) [2023-02-14 13:19:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2023-02-14 13:19:15,906 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 29 [2023-02-14 13:19:15,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:19:15,906 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2023-02-14 13:19:15,906 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) [2023-02-14 13:19:15,906 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2023-02-14 13:19:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 13:19:15,907 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:19:15,907 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] [2023-02-14 13:19:15,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2023-02-14 13:19:16,119 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 [2023-02-14 13:19:16,311 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 [2023-02-14 13:19:16,311 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)] === [2023-02-14 13:19:16,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:19:16,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1572542800, now seen corresponding path program 1 times [2023-02-14 13:19:16,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:19:16,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617567759] [2023-02-14 13:19:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:19:16,312 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 [2023-02-14 13:19:16,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:19:16,313 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) [2023-02-14 13:19:16,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-02-14 13:19:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:19:16,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-14 13:19:16,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:19:16,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:16,918 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 [2023-02-14 13:19:16,928 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:19:16,929 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 [2023-02-14 13:19:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:19:17,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:19:20,389 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 60 treesize of output 54 [2023-02-14 13:19:20,430 INFO L321 Elim1Store]: treesize reduction 7, result has 77.4 percent of original size [2023-02-14 13:19:20,430 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 [2023-02-14 13:19:20,942 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 13:19:20,942 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 [2023-02-14 13:19:20,958 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-14 13:19:20,958 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 [2023-02-14 13:19:21,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:19:21,324 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 [2023-02-14 13:19:21,410 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-14 13:19:21,410 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 [2023-02-14 13:19:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:19:21,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:19:21,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617567759] [2023-02-14 13:19:21,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617567759] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:19:21,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:19:21,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2023-02-14 13:19:21,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500713676] [2023-02-14 13:19:21,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:19:21,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 13:19:21,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:19:21,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 13:19:21,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2023-02-14 13:19:21,623 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) [2023-02-14 13:19:25,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:19:25,391 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2023-02-14 13:19:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 13:19:25,392 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 [2023-02-14 13:19:25,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:19:25,392 INFO L225 Difference]: With dead ends: 168 [2023-02-14 13:19:25,393 INFO L226 Difference]: Without dead ends: 168 [2023-02-14 13:19:25,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 13:19:25,393 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 296 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s 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, 2.7s IncrementalHoareTripleChecker+Time [2023-02-14 13:19:25,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 597 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-02-14 13:19:25,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-14 13:19:25,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2023-02-14 13:19:25,396 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) [2023-02-14 13:19:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2023-02-14 13:19:25,403 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 36 [2023-02-14 13:19:25,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:19:25,403 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2023-02-14 13:19:25,403 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) [2023-02-14 13:19:25,403 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2023-02-14 13:19:25,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 13:19:25,406 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:19:25,406 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] [2023-02-14 13:19:25,415 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 [2023-02-14 13:19:25,606 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 [2023-02-14 13:19:25,606 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)] === [2023-02-14 13:19:25,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:19:25,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1746009876, now seen corresponding path program 1 times [2023-02-14 13:19:25,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:19:25,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184429657] [2023-02-14 13:19:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:19:25,607 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 [2023-02-14 13:19:25,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:19:25,608 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) [2023-02-14 13:19:25,609 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 [2023-02-14 13:19:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:19:25,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-14 13:19:25,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:19:25,928 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 [2023-02-14 13:19:25,977 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 [2023-02-14 13:19:25,987 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 [2023-02-14 13:19:26,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:26,015 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 [2023-02-14 13:19:26,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:26,028 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 [2023-02-14 13:19:26,054 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-14 13:19:26,055 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 [2023-02-14 13:19:26,130 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 [2023-02-14 13:19:26,144 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 [2023-02-14 13:19:26,157 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 [2023-02-14 13:19:26,162 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 [2023-02-14 13:19:27,002 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 [2023-02-14 13:19:27,033 INFO L321 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2023-02-14 13:19:27,033 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 [2023-02-14 13:19:27,044 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 [2023-02-14 13:19:27,050 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 [2023-02-14 13:19:27,063 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 [2023-02-14 13:19:27,206 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2023-02-14 13:19:27,206 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 [2023-02-14 13:19:27,311 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 [2023-02-14 13:19:27,579 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 [2023-02-14 13:19:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:19:27,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:19:31,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:19:31,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184429657] [2023-02-14 13:19:31,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184429657] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:19:31,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [162237606] [2023-02-14 13:19:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:19:31,416 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-14 13:19:31,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-14 13:19:31,417 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) [2023-02-14 13:19:31,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-02-14 13:19:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:19:31,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-14 13:19:31,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:19:31,926 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 [2023-02-14 13:19:31,952 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 [2023-02-14 13:19:31,957 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 [2023-02-14 13:19:31,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:31,970 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 [2023-02-14 13:19:31,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:31,978 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 [2023-02-14 13:19:32,033 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-14 13:19:32,033 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 [2023-02-14 13:19:32,089 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 [2023-02-14 13:19:32,112 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 [2023-02-14 13:19:32,125 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 [2023-02-14 13:19:32,130 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 [2023-02-14 13:19:32,696 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2023-02-14 13:19:32,735 INFO L321 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2023-02-14 13:19:32,735 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 [2023-02-14 13:19:32,745 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 [2023-02-14 13:19:32,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:32,751 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 [2023-02-14 13:19:32,759 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 [2023-02-14 13:19:32,834 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2023-02-14 13:19:32,834 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 [2023-02-14 13:19:32,960 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 [2023-02-14 13:19:33,204 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 [2023-02-14 13:19:33,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:19:33,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:19:37,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [162237606] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:19:37,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:19:37,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 27 [2023-02-14 13:19:37,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986406437] [2023-02-14 13:19:37,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:19:37,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 13:19:37,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:19:37,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 13:19:37,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1245, Unknown=48, NotChecked=0, Total=1406 [2023-02-14 13:19:37,061 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) [2023-02-14 13:19:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:19:43,233 INFO L93 Difference]: Finished difference Result 156 states and 169 transitions. [2023-02-14 13:19:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 13:19:43,233 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 [2023-02-14 13:19:43,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:19:43,234 INFO L225 Difference]: With dead ends: 156 [2023-02-14 13:19:43,234 INFO L226 Difference]: Without dead ends: 156 [2023-02-14 13:19:43,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=307, Invalid=2805, Unknown=80, NotChecked=0, Total=3192 [2023-02-14 13:19:43,235 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 74 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 23 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:19:43,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1048 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1184 Invalid, 14 Unknown, 0 Unchecked, 3.4s Time] [2023-02-14 13:19:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-14 13:19:43,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2023-02-14 13:19:43,238 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) [2023-02-14 13:19:43,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 163 transitions. [2023-02-14 13:19:43,238 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 163 transitions. Word has length 35 [2023-02-14 13:19:43,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:19:43,239 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 163 transitions. [2023-02-14 13:19:43,239 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) [2023-02-14 13:19:43,239 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 163 transitions. [2023-02-14 13:19:43,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 13:19:43,239 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:19:43,239 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] [2023-02-14 13:19:43,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2023-02-14 13:19:43,453 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 [2023-02-14 13:19:43,644 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 [2023-02-14 13:19:43,644 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)] === [2023-02-14 13:19:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:19:43,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1746009877, now seen corresponding path program 1 times [2023-02-14 13:19:43,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:19:43,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570739409] [2023-02-14 13:19:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:19:43,645 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 [2023-02-14 13:19:43,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:19:43,646 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) [2023-02-14 13:19:43,647 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 [2023-02-14 13:19:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:19:43,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-14 13:19:43,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:19:43,979 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 [2023-02-14 13:19:44,022 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 [2023-02-14 13:19:44,030 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 [2023-02-14 13:19:44,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:44,056 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 [2023-02-14 13:19:44,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:44,062 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 [2023-02-14 13:19:44,096 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-14 13:19:44,097 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 [2023-02-14 13:19:44,110 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 [2023-02-14 13:19:44,185 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 [2023-02-14 13:19:44,195 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 13:19:44,218 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 [2023-02-14 13:19:44,223 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 [2023-02-14 13:19:45,496 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 [2023-02-14 13:19:45,606 INFO L321 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2023-02-14 13:19:45,606 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 [2023-02-14 13:19:45,613 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 [2023-02-14 13:19:45,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:45,618 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 [2023-02-14 13:19:45,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:45,629 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 [2023-02-14 13:19:45,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:45,634 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 [2023-02-14 13:19:45,880 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-02-14 13:19:45,880 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 [2023-02-14 13:19:45,890 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 [2023-02-14 13:19:46,026 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 [2023-02-14 13:19:46,041 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:19:46,041 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 [2023-02-14 13:19:46,287 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 [2023-02-14 13:19:46,299 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 [2023-02-14 13:19:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:19:46,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:19:47,138 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 [2023-02-14 13:19:55,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:19:55,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570739409] [2023-02-14 13:19:55,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570739409] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:19:55,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1407432779] [2023-02-14 13:19:55,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:19:55,324 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-14 13:19:55,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-14 13:19:55,326 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) [2023-02-14 13:19:55,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2023-02-14 13:19:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:19:56,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 100 conjunts are in the unsatisfiable core [2023-02-14 13:19:56,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:19:56,126 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 [2023-02-14 13:19:56,146 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 [2023-02-14 13:19:56,152 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 [2023-02-14 13:19:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:56,162 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 [2023-02-14 13:19:56,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:19:56,171 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 [2023-02-14 13:19:56,181 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 [2023-02-14 13:19:56,218 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-14 13:19:56,219 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 [2023-02-14 13:19:56,288 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 [2023-02-14 13:19:56,310 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 [2023-02-14 13:19:56,331 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 [2023-02-14 13:19:56,336 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 [2023-02-14 13:20:00,753 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 [2023-02-14 13:20:00,759 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 [2023-02-14 13:20:00,808 INFO L321 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2023-02-14 13:20:00,808 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 [2023-02-14 13:20:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:20:00,814 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 [2023-02-14 13:20:00,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:20:00,822 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 [2023-02-14 13:20:00,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:20:00,826 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 [2023-02-14 13:20:01,301 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-02-14 13:20:01,301 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 [2023-02-14 13:20:01,317 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 [2023-02-14 13:20:01,560 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 [2023-02-14 13:20:01,577 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-14 13:20:01,577 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 [2023-02-14 13:20:01,611 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 [2023-02-14 13:20:01,620 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 [2023-02-14 13:20:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:20:01,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:20:01,901 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 [2023-02-14 13:20:11,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1407432779] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:20:11,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:20:11,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2023-02-14 13:20:11,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940313449] [2023-02-14 13:20:11,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:20:11,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 13:20:11,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:20:11,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 13:20:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1419, Unknown=31, NotChecked=154, Total=1722 [2023-02-14 13:20:11,695 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) [2023-02-14 13:20:20,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:20:20,716 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2023-02-14 13:20:20,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 13:20:20,716 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 [2023-02-14 13:20:20,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:20:20,717 INFO L225 Difference]: With dead ends: 150 [2023-02-14 13:20:20,717 INFO L226 Difference]: Without dead ends: 150 [2023-02-14 13:20:20,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=216, Invalid=2406, Unknown=38, NotChecked=202, Total=2862 [2023-02-14 13:20:20,718 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 48 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 14 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-02-14 13:20:20,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 855 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1056 Invalid, 20 Unknown, 0 Unchecked, 3.7s Time] [2023-02-14 13:20:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-14 13:20:20,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-02-14 13:20:20,721 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) [2023-02-14 13:20:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 162 transitions. [2023-02-14 13:20:20,721 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 162 transitions. Word has length 35 [2023-02-14 13:20:20,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:20:20,722 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 162 transitions. [2023-02-14 13:20:20,722 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) [2023-02-14 13:20:20,722 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 162 transitions. [2023-02-14 13:20:20,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 13:20:20,722 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:20:20,723 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] [2023-02-14 13:20:20,745 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 [2023-02-14 13:20:20,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2023-02-14 13:20:21,132 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 [2023-02-14 13:20:21,132 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)] === [2023-02-14 13:20:21,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:20:21,132 INFO L85 PathProgramCache]: Analyzing trace with hash 879107445, now seen corresponding path program 1 times [2023-02-14 13:20:21,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:20:21,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146540482] [2023-02-14 13:20:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:20:21,133 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 [2023-02-14 13:20:21,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:20:21,134 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) [2023-02-14 13:20:21,135 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 [2023-02-14 13:20:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:20:21,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-14 13:20:21,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:20:21,563 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 [2023-02-14 13:20:21,571 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 [2023-02-14 13:20:21,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:20:21,611 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 [2023-02-14 13:20:21,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:20:21,620 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 [2023-02-14 13:20:21,641 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:20:21,641 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 [2023-02-14 13:20:21,699 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 [2023-02-14 13:20:21,706 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 [2023-02-14 13:20:21,836 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 [2023-02-14 13:20:21,843 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 [2023-02-14 13:20:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:20:21,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:20:22,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:20:22,131 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 [2023-02-14 13:20:22,507 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 [2023-02-14 13:20:25,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:20:25,552 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 [2023-02-14 13:20:25,555 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 [2023-02-14 13:20:25,561 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 [2023-02-14 13:20:25,574 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-02-14 13:20:25,575 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 [2023-02-14 13:20:25,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:20:25,589 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 [2023-02-14 13:20:25,592 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:20:25,594 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 [2023-02-14 13:20:26,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:20:26,323 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 38 treesize of output 62 [2023-02-14 13:20:26,536 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-14 13:20:26,536 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 [2023-02-14 13:20:26,564 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-14 13:20:26,564 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 [2023-02-14 13:20:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 1 times theorem prover too weak. 0 trivial. 2 not checked. [2023-02-14 13:20:26,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:20:26,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146540482] [2023-02-14 13:20:26,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146540482] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:20:26,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:20:26,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2023-02-14 13:20:26,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872845222] [2023-02-14 13:20:26,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:20:26,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 13:20:26,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:20:26,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 13:20:26,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=731, Unknown=9, NotChecked=54, Total=870 [2023-02-14 13:20:26,583 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) [2023-02-14 13:20:29,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-14 13:20:31,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-14 13:20:36,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-14 13:20:45,909 WARN L233 SmtUtils]: Spent 8.20s 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) [2023-02-14 13:20:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:20:53,811 INFO L93 Difference]: Finished difference Result 182 states and 194 transitions. [2023-02-14 13:20:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 13:20:53,812 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 [2023-02-14 13:20:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:20:53,813 INFO L225 Difference]: With dead ends: 182 [2023-02-14 13:20:53,813 INFO L226 Difference]: Without dead ends: 182 [2023-02-14 13:20:53,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=331, Invalid=2316, Unknown=9, NotChecked=100, Total=2756 [2023-02-14 13:20:53,814 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 257 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 40 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:20:53,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 723 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1011 Invalid, 32 Unknown, 137 Unchecked, 13.2s Time] [2023-02-14 13:20:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-14 13:20:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 153. [2023-02-14 13:20:53,817 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) [2023-02-14 13:20:53,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 163 transitions. [2023-02-14 13:20:53,817 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 163 transitions. Word has length 41 [2023-02-14 13:20:53,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:20:53,818 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 163 transitions. [2023-02-14 13:20:53,818 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) [2023-02-14 13:20:53,818 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 163 transitions. [2023-02-14 13:20:53,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 13:20:53,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:20:53,818 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] [2023-02-14 13:20:53,828 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 [2023-02-14 13:20:54,028 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 [2023-02-14 13:20:54,029 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)] === [2023-02-14 13:20:54,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:20:54,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1398479560, now seen corresponding path program 1 times [2023-02-14 13:20:54,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:20:54,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950005333] [2023-02-14 13:20:54,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:20:54,030 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 [2023-02-14 13:20:54,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:20:54,030 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) [2023-02-14 13:20:54,033 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 [2023-02-14 13:20:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:20:54,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-14 13:20:54,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:20:54,311 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 [2023-02-14 13:20:54,317 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 [2023-02-14 13:20:54,446 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 [2023-02-14 13:20:54,579 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:20:54,579 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 [2023-02-14 13:20:54,595 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 [2023-02-14 13:20:54,647 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:20:54,647 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 [2023-02-14 13:20:54,651 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 [2023-02-14 13:20:54,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:20:54,725 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:20:54,726 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 [2023-02-14 13:20:54,739 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:20:54,739 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 [2023-02-14 13:20:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2023-02-14 13:20:54,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:20:55,165 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-14 13:20:55,166 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 [2023-02-14 13:21:01,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:21:01,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950005333] [2023-02-14 13:21:01,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950005333] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:21:01,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1412866669] [2023-02-14 13:21:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:21:01,369 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-14 13:21:01,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-14 13:21:01,373 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) [2023-02-14 13:21:01,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2023-02-14 13:21:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:21:01,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-14 13:21:01,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:21:01,892 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 [2023-02-14 13:21:01,895 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 [2023-02-14 13:21:02,043 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 [2023-02-14 13:21:02,176 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:21:02,176 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 [2023-02-14 13:21:02,290 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:21:02,291 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 [2023-02-14 13:21:02,294 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 [2023-02-14 13:21:02,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:21:02,616 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:21:02,616 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 [2023-02-14 13:21:02,628 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:21:02,628 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 [2023-02-14 13:21:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:21:02,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:21:03,098 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-14 13:21:03,099 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 [2023-02-14 13:21:09,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1412866669] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:21:09,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:21:09,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 21 [2023-02-14 13:21:09,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680587943] [2023-02-14 13:21:09,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:21:09,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 13:21:09,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:21:09,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 13:21:09,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=579, Unknown=8, NotChecked=48, Total=702 [2023-02-14 13:21:09,853 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) [2023-02-14 13:21:25,354 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] [2023-02-14 13:21:28,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:21:28,662 INFO L93 Difference]: Finished difference Result 254 states and 280 transitions. [2023-02-14 13:21:28,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 13:21:28,662 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 [2023-02-14 13:21:28,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:21:28,664 INFO L225 Difference]: With dead ends: 254 [2023-02-14 13:21:28,664 INFO L226 Difference]: Without dead ends: 254 [2023-02-14 13:21:28,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=142, Invalid=1111, Unknown=11, NotChecked=68, Total=1332 [2023-02-14 13:21:28,664 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 187 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-14 13:21:28,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 437 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 859 Invalid, 1 Unknown, 139 Unchecked, 3.9s Time] [2023-02-14 13:21:28,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-02-14 13:21:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 155. [2023-02-14 13:21:28,668 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) [2023-02-14 13:21:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 166 transitions. [2023-02-14 13:21:28,668 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 166 transitions. Word has length 45 [2023-02-14 13:21:28,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:21:28,668 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 166 transitions. [2023-02-14 13:21:28,669 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) [2023-02-14 13:21:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 166 transitions. [2023-02-14 13:21:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 13:21:28,669 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:21:28,669 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] [2023-02-14 13:21:28,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2023-02-14 13:21:28,884 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 [2023-02-14 13:21:29,075 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 [2023-02-14 13:21:29,075 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)] === [2023-02-14 13:21:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:21:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1768276039, now seen corresponding path program 1 times [2023-02-14 13:21:29,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:21:29,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472672227] [2023-02-14 13:21:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:21:29,076 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 [2023-02-14 13:21:29,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:21:29,077 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) [2023-02-14 13:21:29,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-02-14 13:21:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:21:29,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 13:21:29,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:21:29,391 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 [2023-02-14 13:21:29,419 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-14 13:21:29,420 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 [2023-02-14 13:21:29,446 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 [2023-02-14 13:21:29,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-02-14 13:21:29,550 WARN L859 $PredicateComparison]: unable to prove that (and (not (= |c_#StackHeapBarrier| (_ bv0 32))) (exists ((v_ArrVal_1570 (_ BitVec 1)) (|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| |create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1570)) (bvult |create_sub_list_insert_sub_~sub~0#1.base| |c_#StackHeapBarrier|))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32)))) is different from true [2023-02-14 13:21:29,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:21:29,599 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 [2023-02-14 13:21:29,647 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 [2023-02-14 13:21:29,653 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 [2023-02-14 13:21:29,730 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-14 13:21:29,730 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 [2023-02-14 13:21:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-02-14 13:21:29,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:21:29,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:21:29,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472672227] [2023-02-14 13:21:29,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472672227] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:21:29,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1161136549] [2023-02-14 13:21:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:21:29,984 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-14 13:21:29,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-14 13:21:29,985 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) [2023-02-14 13:21:29,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2023-02-14 13:21:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:21:31,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 13:21:31,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:21:31,105 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-14 13:21:31,105 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 [2023-02-14 13:21:31,115 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 [2023-02-14 13:21:31,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:21:31,176 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-02-14 13:21:31,177 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 [2023-02-14 13:21:31,249 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-02-14 13:21:31,249 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 [2023-02-14 13:21:31,316 WARN L859 $PredicateComparison]: unable to prove that (and (not (= |c_#StackHeapBarrier| (_ bv0 32))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (exists ((v_ArrVal_1685 (_ BitVec 1)) (|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| |create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1685)) (bvult |create_sub_list_insert_sub_~sub~0#1.base| |c_#StackHeapBarrier|)))) is different from true [2023-02-14 13:21:31,342 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 [2023-02-14 13:21:31,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:21:31,426 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-02-14 13:21:31,426 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 25 treesize of output 40 [2023-02-14 13:21:31,485 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-02-14 13:21:31,485 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 [2023-02-14 13:21:31,537 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 [2023-02-14 13:21:31,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:21:31,643 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-02-14 13:21:31,643 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 25 treesize of output 40 [2023-02-14 13:21:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 7 not checked. [2023-02-14 13:21:31,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:21:32,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1161136549] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:21:32,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:21:32,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-02-14 13:21:32,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057116460] [2023-02-14 13:21:32,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:21:32,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 13:21:32,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:21:32,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 13:21:32,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=501, Unknown=14, NotChecked=144, Total=756 [2023-02-14 13:21:32,005 INFO L87 Difference]: Start difference. First operand 155 states and 166 transitions. Second operand has 23 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-14 13:21:33,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:21:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:21:34,697 INFO L93 Difference]: Finished difference Result 258 states and 282 transitions. [2023-02-14 13:21:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 13:21:34,698 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2023-02-14 13:21:34,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:21:34,699 INFO L225 Difference]: With dead ends: 258 [2023-02-14 13:21:34,699 INFO L226 Difference]: Without dead ends: 258 [2023-02-14 13:21:34,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=187, Invalid=800, Unknown=17, NotChecked=186, Total=1190 [2023-02-14 13:21:34,699 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 511 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 94 mSolverCounterUnsat, 172 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 172 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-02-14 13:21:34,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 341 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 509 Invalid, 172 Unknown, 295 Unchecked, 2.3s Time] [2023-02-14 13:21:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-02-14 13:21:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 178. [2023-02-14 13:21:34,703 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) [2023-02-14 13:21:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 203 transitions. [2023-02-14 13:21:34,703 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 203 transitions. Word has length 51 [2023-02-14 13:21:34,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:21:34,704 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 203 transitions. [2023-02-14 13:21:34,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-14 13:21:34,704 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 203 transitions. [2023-02-14 13:21:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 13:21:34,704 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:21:34,704 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] [2023-02-14 13:21:34,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2023-02-14 13:21:34,915 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 [2023-02-14 13:21:35,105 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 [2023-02-14 13:21:35,105 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)] === [2023-02-14 13:21:35,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:21:35,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1768276040, now seen corresponding path program 1 times [2023-02-14 13:21:35,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:21:35,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200507869] [2023-02-14 13:21:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:21:35,106 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 [2023-02-14 13:21:35,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:21:35,107 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) [2023-02-14 13:21:35,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-02-14 13:21:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:21:35,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-14 13:21:35,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:21:35,446 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 [2023-02-14 13:21:35,451 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 [2023-02-14 13:21:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:21:35,471 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 [2023-02-14 13:21:35,480 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:21:35,480 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 [2023-02-14 13:21:35,506 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 [2023-02-14 13:21:35,575 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 [2023-02-14 13:21:35,628 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1803 (_ BitVec 32)) (|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1803) |c_#length|) (bvult |create_sub_list_insert_sub_~sub~0#1.base| |c_#StackHeapBarrier|))) (not (= |c_#StackHeapBarrier| (_ bv0 32))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32)))) is different from true [2023-02-14 13:21:35,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:21:35,664 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 [2023-02-14 13:21:35,716 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 [2023-02-14 13:21:35,723 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 [2023-02-14 13:21:35,828 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:21:35,828 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 [2023-02-14 13:21:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-02-14 13:21:36,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:21:36,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:21:36,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200507869] [2023-02-14 13:21:36,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200507869] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:21:36,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1526755561] [2023-02-14 13:21:36,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:21:36,397 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-14 13:21:36,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-14 13:21:36,398 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) [2023-02-14 13:21:36,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2023-02-14 13:21:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:21:37,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-14 13:21:37,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:21:37,593 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 [2023-02-14 13:21:37,603 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 [2023-02-14 13:21:37,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:21:37,650 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 [2023-02-14 13:21:37,713 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 [2023-02-14 13:21:37,810 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 [2023-02-14 13:21:37,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:21:37,904 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 [2023-02-14 13:21:37,915 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 [2023-02-14 13:21:37,975 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 [2023-02-14 13:21:38,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:21:38,070 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 [2023-02-14 13:21:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 13:21:38,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:21:40,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1526755561] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:21:40,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:21:40,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 20 [2023-02-14 13:21:40,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685402923] [2023-02-14 13:21:40,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:21:40,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 13:21:40,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:21:40,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 13:21:40,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=8, NotChecked=90, Total=650 [2023-02-14 13:21:40,447 INFO L87 Difference]: Start difference. First operand 178 states and 203 transitions. Second operand has 21 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2023-02-14 13:21:41,027 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1803 (_ BitVec 32)) (|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1803) |c_#length|) (bvult |create_sub_list_insert_sub_~sub~0#1.base| |c_#StackHeapBarrier|))) (not (= |c_#StackHeapBarrier| (_ bv0 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)))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32)))) is different from true [2023-02-14 13:21:43,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:21:43,405 INFO L93 Difference]: Finished difference Result 409 states and 454 transitions. [2023-02-14 13:21:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 13:21:43,406 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 [2023-02-14 13:21:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:21:43,407 INFO L225 Difference]: With dead ends: 409 [2023-02-14 13:21:43,407 INFO L226 Difference]: Without dead ends: 409 [2023-02-14 13:21:43,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=148, Invalid=842, Unknown=14, NotChecked=186, Total=1190 [2023-02-14 13:21:43,408 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 430 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 40 mSolverCounterUnsat, 151 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 151 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-02-14 13:21:43,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 906 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1117 Invalid, 151 Unknown, 367 Unchecked, 2.3s Time] [2023-02-14 13:21:43,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-02-14 13:21:43,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 255. [2023-02-14 13:21:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 193 states have (on average 1.2953367875647668) internal successors, (250), 217 states have internal predecessors, (250), 21 states have call successors, (21), 17 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2023-02-14 13:21:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 306 transitions. [2023-02-14 13:21:43,418 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 306 transitions. Word has length 51 [2023-02-14 13:21:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:21:43,419 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 306 transitions. [2023-02-14 13:21:43,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2023-02-14 13:21:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 306 transitions. [2023-02-14 13:21:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 13:21:43,420 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:21:43,421 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] [2023-02-14 13:21:43,435 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 [2023-02-14 13:21:43,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2023-02-14 13:21:43,836 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 [2023-02-14 13:21:43,836 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)] === [2023-02-14 13:21:43,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:21:43,836 INFO L85 PathProgramCache]: Analyzing trace with hash 636971300, now seen corresponding path program 2 times [2023-02-14 13:21:43,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:21:43,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674007430] [2023-02-14 13:21:43,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:21:43,837 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 [2023-02-14 13:21:43,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:21:43,838 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) [2023-02-14 13:21:43,838 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 [2023-02-14 13:21:44,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:21:44,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:21:44,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 99 conjunts are in the unsatisfiable core [2023-02-14 13:21:44,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:21:44,423 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 [2023-02-14 13:21:44,479 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 [2023-02-14 13:21:44,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:21:44,503 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 [2023-02-14 13:21:44,524 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:21:44,524 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 [2023-02-14 13:21:44,571 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 [2023-02-14 13:21:44,764 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 [2023-02-14 13:21:44,842 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:21:44,843 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 [2023-02-14 13:21:44,853 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 [2023-02-14 13:21:44,917 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:21:44,918 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 [2023-02-14 13:21:46,089 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-14 13:21:46,090 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 [2023-02-14 13:21:46,210 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 9 treesize of output 3 [2023-02-14 13:21:46,284 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-14 13:21:46,285 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 [2023-02-14 13:21:46,386 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 [2023-02-14 13:21:46,399 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 [2023-02-14 13:21:47,174 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 [2023-02-14 13:21:47,201 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2023-02-14 13:21:47,201 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 [2023-02-14 13:21:47,348 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2023-02-14 13:21:47,349 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 [2023-02-14 13:21:47,362 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 [2023-02-14 13:21:47,465 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 [2023-02-14 13:21:47,767 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 [2023-02-14 13:21:47,780 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 [2023-02-14 13:21:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:21:47,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:21:48,607 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 [2023-02-14 13:21:52,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:21:52,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674007430] [2023-02-14 13:21:52,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674007430] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:21:52,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [917706679] [2023-02-14 13:21:52,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:21:52,142 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-14 13:21:52,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-14 13:21:52,143 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) [2023-02-14 13:21:52,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2023-02-14 13:21:52,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 13:21:52,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566204726] [2023-02-14 13:21:52,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:21:52,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:21:52,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:21:52,649 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) [2023-02-14 13:21:52,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-14 13:21:52,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 1 [2023-02-14 13:21:53,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:21:53,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:21:53,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 116 conjunts are in the unsatisfiable core [2023-02-14 13:21:53,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:21:53,743 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 [2023-02-14 13:21:53,747 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 [2023-02-14 13:21:54,017 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 [2023-02-14 13:21:54,022 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 [2023-02-14 13:21:54,147 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 [2023-02-14 13:21:54,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:21:54,175 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 [2023-02-14 13:21:54,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:21:54,189 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 [2023-02-14 13:21:54,315 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:21:54,315 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 [2023-02-14 13:21:54,456 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 [2023-02-14 13:21:54,462 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 [2023-02-14 13:21:55,931 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 [2023-02-14 13:21:55,982 INFO L321 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2023-02-14 13:21:55,983 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 [2023-02-14 13:21:55,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 89 [2023-02-14 13:21:56,004 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 [2023-02-14 13:21:56,016 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 [2023-02-14 13:21:56,069 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-14 13:21:56,069 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 [2023-02-14 13:21:56,123 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-14 13:21:56,144 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 [2023-02-14 13:21:57,650 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 [2023-02-14 13:21:57,678 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2023-02-14 13:21:57,678 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 [2023-02-14 13:21:57,744 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2023-02-14 13:21:57,744 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 [2023-02-14 13:21:57,914 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 34 treesize of output 32 [2023-02-14 13:21:58,193 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 [2023-02-14 13:21:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:21:58,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:21:58,713 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2379 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_2379) |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 [2023-02-14 13:21:59,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566204726] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:21:59,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:21:59,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 55 [2023-02-14 13:21:59,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802793824] [2023-02-14 13:21:59,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:21:59,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-14 13:21:59,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-14 13:21:59,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-14 13:21:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=4365, Unknown=100, NotChecked=134, Total=4830 [2023-02-14 13:21:59,937 INFO L87 Difference]: Start difference. First operand 255 states and 306 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) [2023-02-14 13:22:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:22:17,673 INFO L93 Difference]: Finished difference Result 256 states and 305 transitions. [2023-02-14 13:22:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-14 13:22:17,674 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 [2023-02-14 13:22:17,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:22:17,675 INFO L225 Difference]: With dead ends: 256 [2023-02-14 13:22:17,675 INFO L226 Difference]: Without dead ends: 256 [2023-02-14 13:22:17,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=706, Invalid=9411, Unknown=189, NotChecked=200, Total=10506 [2023-02-14 13:22:17,677 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 102 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 34 mSolverCounterUnsat, 53 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 53 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:22:17,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1568 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2236 Invalid, 53 Unknown, 0 Unchecked, 7.2s Time] [2023-02-14 13:22:17,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-02-14 13:22:17,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2023-02-14 13:22:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 193 states have (on average 1.2901554404145077) internal successors, (249), 217 states have internal predecessors, (249), 21 states have call successors, (21), 17 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2023-02-14 13:22:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 305 transitions. [2023-02-14 13:22:17,699 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 305 transitions. Word has length 51 [2023-02-14 13:22:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:22:17,700 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 305 transitions. [2023-02-14 13:22:17,700 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) [2023-02-14 13:22:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 305 transitions. [2023-02-14 13:22:17,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 13:22:17,700 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:22:17,700 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] [2023-02-14 13:22:17,717 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 [2023-02-14 13:22:17,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-02-14 13:22:18,112 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 [2023-02-14 13:22:18,112 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)] === [2023-02-14 13:22:18,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:22:18,112 INFO L85 PathProgramCache]: Analyzing trace with hash 636971301, now seen corresponding path program 2 times [2023-02-14 13:22:18,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-14 13:22:18,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554612927] [2023-02-14 13:22:18,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:22:18,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-14 13:22:18,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-14 13:22:18,114 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) [2023-02-14 13:22:18,114 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 [2023-02-14 13:22:18,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:22:18,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:22:18,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 122 conjunts are in the unsatisfiable core [2023-02-14 13:22:18,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:22:18,748 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 [2023-02-14 13:22:18,790 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 [2023-02-14 13:22:18,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:22:18,814 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 [2023-02-14 13:22:18,827 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-14 13:22:18,827 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 [2023-02-14 13:22:18,872 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 [2023-02-14 13:22:19,029 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 [2023-02-14 13:22:19,100 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:22:19,100 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 [2023-02-14 13:22:19,106 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 [2023-02-14 13:22:19,186 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:22:19,186 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 [2023-02-14 13:22:21,106 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2023-02-14 13:22:21,108 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 [2023-02-14 13:22:21,230 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 9 treesize of output 3 [2023-02-14 13:22:21,308 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-02-14 13:22:21,308 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 [2023-02-14 13:22:21,322 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 [2023-02-14 13:22:21,427 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 [2023-02-14 13:22:21,447 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 [2023-02-14 13:22:21,860 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 [2023-02-14 13:22:21,967 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:22:21,967 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 [2023-02-14 13:22:21,977 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 [2023-02-14 13:22:22,118 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-14 13:22:22,119 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 [2023-02-14 13:22:22,251 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-14 13:22:22,251 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 [2023-02-14 13:22:22,256 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 7 treesize of output 3 [2023-02-14 13:22:22,439 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 [2023-02-14 13:22:22,467 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2023-02-14 13:22:22,467 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 50 treesize of output 55 [2023-02-14 13:22:22,640 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-02-14 13:22:22,640 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 [2023-02-14 13:22:22,653 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 [2023-02-14 13:22:22,765 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 [2023-02-14 13:22:22,772 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 [2023-02-14 13:22:23,123 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 [2023-02-14 13:22:23,143 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 [2023-02-14 13:22:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:22:23,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:22:25,808 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:22:25,808 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 [2023-02-14 13:22:25,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:22:25,838 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 414 treesize of output 395 [2023-02-14 13:22:25,847 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 378 treesize of output 314 [2023-02-14 13:22:25,876 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 314 treesize of output 282 [2023-02-14 13:22:25,897 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 149 treesize of output 133 [2023-02-14 13:22:26,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:22:26,309 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 74 treesize of output 75 [2023-02-14 13:22:26,320 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:22:26,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:22:26,355 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 482 treesize of output 475 [2023-02-14 13:22:26,370 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 229 treesize of output 221 [2023-02-14 13:22:26,378 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 450 treesize of output 434 [2023-02-14 13:23:22,880 WARN L233 SmtUtils]: Spent 45.30s on a formula simplification. DAG size of input: 114 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:23:22,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-14 13:23:22,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554612927] [2023-02-14 13:23:22,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554612927] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:23:22,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1949981689] [2023-02-14 13:23:22,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:23:22,881 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-14 13:23:22,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-14 13:23:22,883 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-14 13:23:22,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process