./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/list-properties/list_search-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 6c24879c 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/list-properties/list_search-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:08:23,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:08:23,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:08:23,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:08:23,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:08:23,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:08:23,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:08:23,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:08:23,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:08:23,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:08:23,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:08:23,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:08:23,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:08:23,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:08:23,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:08:23,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:08:23,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:08:23,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:08:23,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:08:23,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:08:23,308 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:08:23,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:08:23,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:08:23,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:08:23,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:08:23,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:08:23,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:08:23,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:08:23,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:08:23,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:08:23,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:08:23,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:08:23,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:08:23,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:08:23,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:08:23,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:08:23,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:08:23,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:08:23,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:08:23,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:08:23,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:08:23,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:08:23,327 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-07-12 18:08:23,349 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:08:23,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:08:23,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:08:23,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:08:23,350 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:08:23,351 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:08:23,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:08:23,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:08:23,351 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:08:23,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:08:23,352 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:08:23,352 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:08:23,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:08:23,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:08:23,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:08:23,353 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:08:23,353 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:08:23,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:08:23,353 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:08:23,354 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:08:23,354 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:08:23,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:08:23,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:08:23,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:08:23,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:08:23,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:08:23,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:08:23,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:08:23,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:08:23,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 [2022-07-12 18:08:23,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:08:23,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:08:23,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:08:23,554 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:08:23,554 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:08:23,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_search-2.i [2022-07-12 18:08:23,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc8b6bed1/5a5aa4e8584b40b1bd792c95424afea9/FLAG0240bcf49 [2022-07-12 18:08:24,119 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:08:24,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i [2022-07-12 18:08:24,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc8b6bed1/5a5aa4e8584b40b1bd792c95424afea9/FLAG0240bcf49 [2022-07-12 18:08:24,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc8b6bed1/5a5aa4e8584b40b1bd792c95424afea9 [2022-07-12 18:08:24,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:08:24,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:08:24,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:08:24,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:08:24,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:08:24,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:08:24" (1/1) ... [2022-07-12 18:08:24,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cf31162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:24, skipping insertion in model container [2022-07-12 18:08:24,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:08:24" (1/1) ... [2022-07-12 18:08:24,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:08:24,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:08:24,752 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2022-07-12 18:08:24,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:08:24,985 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-12 18:08:24,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5ae12c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:24, skipping insertion in model container [2022-07-12 18:08:24,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:08:24,988 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-12 18:08:24,995 INFO L158 Benchmark]: Toolchain (without parser) took 569.54ms. Allocated memory is still 90.2MB. Free memory was 55.1MB in the beginning and 61.2MB in the end (delta: -6.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 18:08:24,996 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 90.2MB. Free memory is still 47.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:08:24,997 INFO L158 Benchmark]: CACSL2BoogieTranslator took 567.92ms. Allocated memory is still 90.2MB. Free memory was 55.0MB in the beginning and 61.2MB in the end (delta: -6.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 18:08:25,019 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 90.2MB. Free memory is still 47.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 567.92ms. Allocated memory is still 90.2MB. Free memory was 55.0MB in the beginning and 61.2MB in the end (delta: -6.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 792]: 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/list-properties/list_search-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:08:27,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:08:27,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:08:27,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:08:27,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:08:27,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:08:27,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:08:27,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:08:27,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:08:27,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:08:27,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:08:27,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:08:27,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:08:27,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:08:27,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:08:27,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:08:27,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:08:27,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:08:27,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:08:27,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:08:27,722 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:08:27,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:08:27,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:08:27,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:08:27,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:08:27,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:08:27,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:08:27,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:08:27,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:08:27,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:08:27,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:08:27,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:08:27,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:08:27,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:08:27,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:08:27,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:08:27,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:08:27,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:08:27,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:08:27,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:08:27,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:08:27,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:08:27,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2022-07-12 18:08:27,765 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:08:27,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:08:27,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:08:27,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:08:27,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:08:27,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:08:27,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:08:27,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:08:27,768 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:08:27,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:08:27,769 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:08:27,769 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:08:27,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:08:27,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:08:27,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:08:27,769 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:08:27,770 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:08:27,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:08:27,770 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:08:27,770 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 18:08:27,770 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 18:08:27,770 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:08:27,770 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:08:27,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:08:27,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:08:27,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:08:27,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:08:27,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:08:27,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:08:27,772 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 18:08:27,772 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 18:08:27,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 18:08:27,772 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 [2022-07-12 18:08:28,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:08:28,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:08:28,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:08:28,227 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:08:28,227 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:08:28,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_search-2.i [2022-07-12 18:08:28,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06e8f63dd/eb689b69aa1347d0b8cb64dcf825f240/FLAG5e444567c [2022-07-12 18:08:28,910 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:08:28,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i [2022-07-12 18:08:28,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06e8f63dd/eb689b69aa1347d0b8cb64dcf825f240/FLAG5e444567c [2022-07-12 18:08:29,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06e8f63dd/eb689b69aa1347d0b8cb64dcf825f240 [2022-07-12 18:08:29,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:08:29,307 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:08:29,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:08:29,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:08:29,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:08:29,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:08:29" (1/1) ... [2022-07-12 18:08:29,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a65f861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:29, skipping insertion in model container [2022-07-12 18:08:29,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:08:29" (1/1) ... [2022-07-12 18:08:29,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:08:29,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:08:29,639 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2022-07-12 18:08:29,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:08:29,885 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-12 18:08:29,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:08:29,906 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2022-07-12 18:08:29,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:08:29,957 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:08:29,982 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2022-07-12 18:08:30,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:08:30,136 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:08:30,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30 WrapperNode [2022-07-12 18:08:30,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:08:30,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:08:30,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:08:30,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:08:30,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,182 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,237 INFO L137 Inliner]: procedures = 229, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2022-07-12 18:08:30,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:08:30,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:08:30,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:08:30,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:08:30,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:08:30,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:08:30,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:08:30,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:08:30,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (1/1) ... [2022-07-12 18:08:30,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:08:30,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:08:30,377 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 18:08:30,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 18:08:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-12 18:08:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:08:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-12 18:08:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:08:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-12 18:08:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:08:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:08:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:08:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2022-07-12 18:08:30,459 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2022-07-12 18:08:30,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:08:30,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:08:30,648 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:08:30,668 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:08:31,138 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:08:31,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:08:31,144 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 18:08:31,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:08:31 BoogieIcfgContainer [2022-07-12 18:08:31,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:08:31,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:08:31,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:08:31,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:08:31,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:08:29" (1/3) ... [2022-07-12 18:08:31,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2beb77e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:08:31, skipping insertion in model container [2022-07-12 18:08:31,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:08:30" (2/3) ... [2022-07-12 18:08:31,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2beb77e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:08:31, skipping insertion in model container [2022-07-12 18:08:31,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:08:31" (3/3) ... [2022-07-12 18:08:31,166 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-2.i [2022-07-12 18:08:31,177 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:08:31,191 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2022-07-12 18:08:31,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:08:31,284 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2059b98a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2078f5e8 [2022-07-12 18:08:31,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-07-12 18:08:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 85 states have internal predecessors, (97), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:08:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:08:31,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:31,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:08:31,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:08:31,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:31,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1514693702, now seen corresponding path program 1 times [2022-07-12 18:08:31,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:31,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079889141] [2022-07-12 18:08:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:31,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:31,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:31,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:31,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 18:08:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:31,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:08:31,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:31,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:08:31,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:08:31,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:31,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079889141] [2022-07-12 18:08:31,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079889141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:08:31,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:08:31,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:08:31,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312112937] [2022-07-12 18:08:31,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:08:31,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:08:31,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:31,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:08:31,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:08:31,664 INFO L87 Difference]: Start difference. First operand has 91 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 85 states have internal predecessors, (97), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:08:31,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:31,891 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2022-07-12 18:08:31,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:08:31,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2022-07-12 18:08:31,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:31,898 INFO L225 Difference]: With dead ends: 87 [2022-07-12 18:08:31,898 INFO L226 Difference]: Without dead ends: 85 [2022-07-12 18:08:31,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:08:31,902 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 11 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:31,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 140 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:08:31,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-12 18:08:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-07-12 18:08:31,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 79 states have internal predecessors, (86), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:08:31,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2022-07-12 18:08:31,944 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 6 [2022-07-12 18:08:31,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:31,945 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2022-07-12 18:08:31,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:08:31,949 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2022-07-12 18:08:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:08:31,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:31,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:08:31,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-12 18:08:32,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:32,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:08:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:32,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1514693703, now seen corresponding path program 1 times [2022-07-12 18:08:32,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:32,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128710110] [2022-07-12 18:08:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:32,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:32,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:32,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:32,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 18:08:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:32,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:08:32,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:32,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:08:32,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:08:32,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:32,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128710110] [2022-07-12 18:08:32,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128710110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:08:32,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:08:32,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:08:32,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509912462] [2022-07-12 18:08:32,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:08:32,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:08:32,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:32,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:08:32,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:08:32,330 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:08:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:32,448 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2022-07-12 18:08:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:08:32,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2022-07-12 18:08:32,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:32,449 INFO L225 Difference]: With dead ends: 81 [2022-07-12 18:08:32,449 INFO L226 Difference]: Without dead ends: 81 [2022-07-12 18:08:32,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:08:32,450 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 7 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:32,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 141 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:08:32,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-12 18:08:32,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-12 18:08:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.607843137254902) internal successors, (82), 75 states have internal predecessors, (82), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:08:32,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2022-07-12 18:08:32,457 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 6 [2022-07-12 18:08:32,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:32,457 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2022-07-12 18:08:32,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:08:32,458 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2022-07-12 18:08:32,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:08:32,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:32,459 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:32,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:32,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:32,666 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:08:32,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:32,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1345131113, now seen corresponding path program 1 times [2022-07-12 18:08:32,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:32,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577887905] [2022-07-12 18:08:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:32,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:32,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:32,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:32,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 18:08:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:32,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:08:32,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:08:33,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:08:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 18:08:33,134 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:33,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577887905] [2022-07-12 18:08:33,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577887905] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:08:33,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:08:33,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-07-12 18:08:33,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008721476] [2022-07-12 18:08:33,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:08:33,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:08:33,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:33,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:08:33,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:08:33,141 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:08:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:33,417 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2022-07-12 18:08:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:08:33,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2022-07-12 18:08:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:33,420 INFO L225 Difference]: With dead ends: 111 [2022-07-12 18:08:33,420 INFO L226 Difference]: Without dead ends: 111 [2022-07-12 18:08:33,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:08:33,421 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 90 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:33,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 339 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:08:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-12 18:08:33,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2022-07-12 18:08:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 79 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:08:33,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2022-07-12 18:08:33,442 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 40 [2022-07-12 18:08:33,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:33,446 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2022-07-12 18:08:33,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:08:33,446 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2022-07-12 18:08:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:08:33,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:33,448 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:33,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:33,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:33,664 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:08:33,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:33,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1982971279, now seen corresponding path program 1 times [2022-07-12 18:08:33,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:33,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057604414] [2022-07-12 18:08:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:33,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:33,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:33,670 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:33,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 18:08:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:33,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:08:33,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:33,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 18:08:33,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:08:33,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:33,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057604414] [2022-07-12 18:08:33,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057604414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:08:33,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:08:33,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:08:33,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277064489] [2022-07-12 18:08:33,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:08:33,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:08:33,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:33,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:08:33,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:08:33,963 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:34,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:34,240 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2022-07-12 18:08:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:08:34,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2022-07-12 18:08:34,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:34,243 INFO L225 Difference]: With dead ends: 166 [2022-07-12 18:08:34,243 INFO L226 Difference]: Without dead ends: 166 [2022-07-12 18:08:34,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:08:34,244 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 191 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:34,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 148 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:08:34,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-12 18:08:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 88. [2022-07-12 18:08:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 57 states have (on average 1.5789473684210527) internal successors, (90), 81 states have internal predecessors, (90), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:08:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2022-07-12 18:08:34,251 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 40 [2022-07-12 18:08:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:34,251 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2022-07-12 18:08:34,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2022-07-12 18:08:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:08:34,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:34,253 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:34,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:34,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:34,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:08:34,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:34,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1982971278, now seen corresponding path program 1 times [2022-07-12 18:08:34,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:34,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726988302] [2022-07-12 18:08:34,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:34,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:34,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:34,477 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:34,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 18:08:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:34,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:08:34,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:34,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 18:08:34,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:08:34,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:34,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726988302] [2022-07-12 18:08:34,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726988302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:08:34,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:08:34,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:08:34,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403770659] [2022-07-12 18:08:34,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:08:34,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:08:34,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:34,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:08:34,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:08:34,810 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:35,275 INFO L93 Difference]: Finished difference Result 184 states and 198 transitions. [2022-07-12 18:08:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:08:35,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2022-07-12 18:08:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:35,277 INFO L225 Difference]: With dead ends: 184 [2022-07-12 18:08:35,278 INFO L226 Difference]: Without dead ends: 184 [2022-07-12 18:08:35,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:08:35,278 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 216 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:35,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 156 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:08:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-12 18:08:35,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 97. [2022-07-12 18:08:35,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 66 states have (on average 1.621212121212121) internal successors, (107), 90 states have internal predecessors, (107), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:08:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2022-07-12 18:08:35,298 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 40 [2022-07-12 18:08:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:35,298 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2022-07-12 18:08:35,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2022-07-12 18:08:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 18:08:35,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:35,301 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:35,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:35,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:35,502 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:08:35,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:35,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1718799074, now seen corresponding path program 1 times [2022-07-12 18:08:35,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:35,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653267502] [2022-07-12 18:08:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:35,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:35,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:35,508 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:35,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 18:08:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:35,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:08:35,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 18:08:35,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:08:35,817 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:35,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653267502] [2022-07-12 18:08:35,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653267502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:08:35,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:08:35,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:08:35,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093572049] [2022-07-12 18:08:35,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:08:35,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:08:35,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:35,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:08:35,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:08:35,821 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:35,988 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2022-07-12 18:08:35,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:08:35,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-07-12 18:08:35,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:35,990 INFO L225 Difference]: With dead ends: 118 [2022-07-12 18:08:35,990 INFO L226 Difference]: Without dead ends: 118 [2022-07-12 18:08:35,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:08:35,991 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 94 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:35,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 242 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:08:35,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-12 18:08:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2022-07-12 18:08:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 90 states have internal predecessors, (105), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:08:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-07-12 18:08:36,017 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 43 [2022-07-12 18:08:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:36,017 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-07-12 18:08:36,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:08:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-07-12 18:08:36,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 18:08:36,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:36,021 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:36,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:36,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:36,222 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:08:36,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:36,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1717169730, now seen corresponding path program 1 times [2022-07-12 18:08:36,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:36,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301652591] [2022-07-12 18:08:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:36,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:36,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:36,225 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:36,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 18:08:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:36,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 18:08:36,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:36,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:36,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:36,702 INFO L356 Elim1Store]: treesize reduction 30, result has 31.8 percent of original size [2022-07-12 18:08:36,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2022-07-12 18:08:36,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-12 18:08:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:08:36,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:08:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:08:37,282 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:37,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301652591] [2022-07-12 18:08:37,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301652591] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:08:37,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:08:37,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-07-12 18:08:37,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883974869] [2022-07-12 18:08:37,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:08:37,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 18:08:37,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:37,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 18:08:37,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:08:37,284 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:08:38,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:38,548 INFO L93 Difference]: Finished difference Result 179 states and 193 transitions. [2022-07-12 18:08:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:08:38,548 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-07-12 18:08:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:38,549 INFO L225 Difference]: With dead ends: 179 [2022-07-12 18:08:38,549 INFO L226 Difference]: Without dead ends: 179 [2022-07-12 18:08:38,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:08:38,550 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 509 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:38,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 390 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 18:08:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-12 18:08:38,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 102. [2022-07-12 18:08:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.5774647887323943) internal successors, (112), 95 states have internal predecessors, (112), 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) [2022-07-12 18:08:38,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2022-07-12 18:08:38,565 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 43 [2022-07-12 18:08:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:38,565 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2022-07-12 18:08:38,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:08:38,566 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2022-07-12 18:08:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 18:08:38,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:38,567 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:38,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:38,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:38,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:08:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1717169729, now seen corresponding path program 1 times [2022-07-12 18:08:38,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:38,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933716117] [2022-07-12 18:08:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:38,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:38,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:38,789 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:38,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-12 18:08:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:39,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:08:39,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:39,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:39,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:39,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:39,479 INFO L356 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2022-07-12 18:08:39,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-07-12 18:08:39,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-12 18:08:39,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:08:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:08:39,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:08:40,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:40,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933716117] [2022-07-12 18:08:40,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933716117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:08:40,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1142265060] [2022-07-12 18:08:40,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:40,462 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:08:40,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:08:40,464 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:08:40,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-07-12 18:08:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:40,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 18:08:40,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:40,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:40,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:41,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:41,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:41,514 INFO L356 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-07-12 18:08:41,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-12 18:08:41,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-12 18:08:41,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-12 18:08:41,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:08:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:08:41,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:08:46,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1142265060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:08:46,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:08:46,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-07-12 18:08:46,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562240897] [2022-07-12 18:08:46,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:08:46,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 18:08:46,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:46,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 18:08:46,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=580, Unknown=1, NotChecked=0, Total=650 [2022-07-12 18:08:46,352 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:08:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:49,009 INFO L93 Difference]: Finished difference Result 191 states and 204 transitions. [2022-07-12 18:08:49,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 18:08:49,010 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-07-12 18:08:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:49,011 INFO L225 Difference]: With dead ends: 191 [2022-07-12 18:08:49,011 INFO L226 Difference]: Without dead ends: 191 [2022-07-12 18:08:49,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=281, Invalid=1524, Unknown=1, NotChecked=0, Total=1806 [2022-07-12 18:08:49,012 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 535 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:49,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 580 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 831 Invalid, 0 Unknown, 300 Unchecked, 1.4s Time] [2022-07-12 18:08:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-07-12 18:08:49,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 102. [2022-07-12 18:08:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.5633802816901408) internal successors, (111), 95 states have internal predecessors, (111), 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) [2022-07-12 18:08:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-07-12 18:08:49,027 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 43 [2022-07-12 18:08:49,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:49,027 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-07-12 18:08:49,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:08:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-07-12 18:08:49,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 18:08:49,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:49,029 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:49,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:49,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:49,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 18:08:49,439 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:08:49,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:49,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1150420657, now seen corresponding path program 1 times [2022-07-12 18:08:49,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:49,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219004072] [2022-07-12 18:08:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:08:49,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:49,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:49,442 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:49,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-12 18:08:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:08:49,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 18:08:49,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:49,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:49,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 18:08:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:08:49,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:08:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:08:50,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:50,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219004072] [2022-07-12 18:08:50,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219004072] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:08:50,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:08:50,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2022-07-12 18:08:50,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480420733] [2022-07-12 18:08:50,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:08:50,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 18:08:50,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:50,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 18:08:50,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:08:50,105 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:08:51,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:51,179 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2022-07-12 18:08:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:08:51,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-07-12 18:08:51,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:51,181 INFO L225 Difference]: With dead ends: 128 [2022-07-12 18:08:51,181 INFO L226 Difference]: Without dead ends: 128 [2022-07-12 18:08:51,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:08:51,182 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 299 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:51,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 665 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 18:08:51,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-12 18:08:51,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2022-07-12 18:08:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.5492957746478873) internal successors, (110), 95 states have internal predecessors, (110), 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) [2022-07-12 18:08:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2022-07-12 18:08:51,185 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 46 [2022-07-12 18:08:51,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:51,185 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2022-07-12 18:08:51,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 18:08:51,186 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2022-07-12 18:08:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 18:08:51,186 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:51,186 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:51,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:51,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:51,399 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:08:51,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:51,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1152050001, now seen corresponding path program 2 times [2022-07-12 18:08:51,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:51,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880669646] [2022-07-12 18:08:51,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:08:51,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:51,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:51,402 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:51,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-12 18:08:51,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:08:51,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:08:51,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-12 18:08:51,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:51,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:51,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:51,836 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:08:51,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:08:52,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:08:52,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:52,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:08:52,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-07-12 18:08:52,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:08:52,316 INFO L356 Elim1Store]: treesize reduction 69, result has 41.5 percent of original size [2022-07-12 18:08:52,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 77 [2022-07-12 18:08:52,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 57 [2022-07-12 18:08:52,763 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:08:52,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 32 [2022-07-12 18:08:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:08:52,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:08:53,451 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:08:53,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-07-12 18:08:53,463 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_2 (Array (_ BitVec 32) (_ BitVec 32))) (v_~head~0.base_93 (_ BitVec 32))) (or (not (= (select v_arrayElimArr_2 (_ bv4 32)) c_~head~0.base)) (= (select (store |c_#valid| v_~head~0.base_93 (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_93 v_arrayElimArr_2) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32)))) (_ bv1 1)) (not (= (bvneg (select |c_#valid| v_~head~0.base_93)) (_ bv0 1))))) is different from false [2022-07-12 18:08:53,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:08:53,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880669646] [2022-07-12 18:08:53,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880669646] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:08:53,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1822200671] [2022-07-12 18:08:53,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:08:53,465 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:08:53,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:08:53,467 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:08:53,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-07-12 18:08:53,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:08:53,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:08:53,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 18:08:53,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:53,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:53,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:53,999 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:08:54,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:08:54,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:08:54,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:54,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:08:54,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-07-12 18:08:54,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:08:54,337 INFO L356 Elim1Store]: treesize reduction 69, result has 41.5 percent of original size [2022-07-12 18:08:54,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 77 [2022-07-12 18:08:54,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 57 [2022-07-12 18:08:54,551 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:08:54,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 32 [2022-07-12 18:08:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:08:54,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:08:55,153 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:08:55,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-07-12 18:08:55,170 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_99 (_ BitVec 32)) (v_arrayElimArr_4 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_4 (_ bv4 32)) c_~head~0.base)) (not (= (bvneg (select |c_#valid| v_~head~0.base_99)) (_ bv0 1))) (= (_ bv1 1) (select (store |c_#valid| v_~head~0.base_99 (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_99 v_arrayElimArr_4) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32))))))) is different from false [2022-07-12 18:08:55,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1822200671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:08:55,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:08:55,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2022-07-12 18:08:55,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23044796] [2022-07-12 18:08:55,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:08:55,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:08:55,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:08:55,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:08:55,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=625, Unknown=3, NotChecked=102, Total=812 [2022-07-12 18:08:55,173 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 18:08:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:08:56,611 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-07-12 18:08:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 18:08:56,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-07-12 18:08:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:08:56,612 INFO L225 Difference]: With dead ends: 112 [2022-07-12 18:08:56,612 INFO L226 Difference]: Without dead ends: 112 [2022-07-12 18:08:56,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=8, NotChecked=130, Total=1260 [2022-07-12 18:08:56,613 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 14 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:08:56,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 772 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 303 Invalid, 0 Unknown, 322 Unchecked, 0.7s Time] [2022-07-12 18:08:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-12 18:08:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2022-07-12 18:08:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 74 states have (on average 1.554054054054054) internal successors, (115), 98 states have internal predecessors, (115), 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) [2022-07-12 18:08:56,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2022-07-12 18:08:56,616 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 46 [2022-07-12 18:08:56,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:08:56,616 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2022-07-12 18:08:56,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 18:08:56,617 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2022-07-12 18:08:56,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 18:08:56,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:08:56,617 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:08:56,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:56,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:08:57,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:08:57,026 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:08:57,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:08:57,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1152050002, now seen corresponding path program 2 times [2022-07-12 18:08:57,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:08:57,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102923095] [2022-07-12 18:08:57,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:08:57,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:08:57,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:08:57,029 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:08:57,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-12 18:08:57,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:08:57,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:08:57,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-12 18:08:57,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:08:57,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:57,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:08:57,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:57,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:08:57,745 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-07-12 18:08:57,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 30 [2022-07-12 18:08:57,767 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:08:57,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:08:58,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:08:58,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:08:58,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:08:58,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2022-07-12 18:08:58,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:08:58,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-07-12 18:08:58,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:08:58,366 INFO L356 Elim1Store]: treesize reduction 4, result has 84.6 percent of original size [2022-07-12 18:08:58,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2022-07-12 18:08:58,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-12 18:08:58,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:08:58,966 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:08:58,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 50 [2022-07-12 18:08:58,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2022-07-12 18:08:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:08:59,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:09:00,366 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:00,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-07-12 18:09:00,381 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:00,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2022-07-12 18:09:00,388 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:00,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-07-12 18:09:07,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:09:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102923095] [2022-07-12 18:09:07,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102923095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:09:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1992270306] [2022-07-12 18:09:07,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:09:07,229 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:09:07,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:09:07,231 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:09:07,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-07-12 18:09:07,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:09:07,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:09:07,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-12 18:09:07,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:09:07,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:09:07,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:09:10,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:09:10,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:09:11,797 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:09:11,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:09:12,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-12 18:09:17,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:09:17,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:09:21,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:21,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2022-07-12 18:09:21,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:21,533 INFO L356 Elim1Store]: treesize reduction 4, result has 83.3 percent of original size [2022-07-12 18:09:21,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2022-07-12 18:09:21,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-07-12 18:09:21,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:09:21,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-07-12 18:09:29,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:09:29,574 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:09:29,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 50 [2022-07-12 18:09:29,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2022-07-12 18:09:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:09:32,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:09:36,246 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:36,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2022-07-12 18:09:36,336 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:36,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-07-12 18:09:36,569 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:09:36,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-07-12 18:09:37,111 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_~head~0.base_111 (_ BitVec 32))) (or (forall ((v_ArrVal_1241 (_ BitVec 32)) (v_arrayElimArr_12 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_13 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= c_~head~0.base (select v_arrayElimArr_12 (_ bv4 32)))) (let ((.cse0 (bvadd c_~head~0.offset (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_111 v_arrayElimArr_13) c_~head~0.base) .cse0) (_ bv8 32)) (select (store |c_#length| v_~head~0.base_111 v_ArrVal_1241) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_111 v_arrayElimArr_12) c_~head~0.base) .cse0)))) (not (= c_~head~0.offset (select v_arrayElimArr_13 (_ bv4 32)))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_~head~0.base_111)))))) (forall ((v_~head~0.base_111 (_ BitVec 32))) (or (forall ((v_arrayElimArr_14 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= c_~head~0.offset (select v_arrayElimArr_14 (_ bv4 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_111 v_arrayElimArr_14) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32))))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_~head~0.base_111))))))) is different from false [2022-07-12 18:09:37,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1992270306] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:09:37,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:09:37,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2022-07-12 18:09:37,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739394986] [2022-07-12 18:09:37,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:09:37,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 18:09:37,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:09:37,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 18:09:37,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1211, Unknown=25, NotChecked=70, Total=1406 [2022-07-12 18:09:37,149 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 26 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:10:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:10:10,041 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2022-07-12 18:10:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 18:10:10,042 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 26 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2022-07-12 18:10:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:10:10,043 INFO L225 Difference]: With dead ends: 112 [2022-07-12 18:10:10,043 INFO L226 Difference]: Without dead ends: 112 [2022-07-12 18:10:10,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=203, Invalid=2203, Unknown=48, NotChecked=96, Total=2550 [2022-07-12 18:10:10,044 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 17 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 530 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:10:10,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 992 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 553 Invalid, 0 Unknown, 530 Unchecked, 12.7s Time] [2022-07-12 18:10:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-12 18:10:10,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2022-07-12 18:10:10,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 74 states have (on average 1.5405405405405406) internal successors, (114), 98 states have internal predecessors, (114), 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) [2022-07-12 18:10:10,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2022-07-12 18:10:10,047 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 46 [2022-07-12 18:10:10,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:10:10,047 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2022-07-12 18:10:10,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 26 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:10:10,048 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2022-07-12 18:10:10,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 18:10:10,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:10:10,048 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:10:10,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:10:10,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:10:10,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:10:10,454 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:10:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:10:10,454 INFO L85 PathProgramCache]: Analyzing trace with hash -363698114, now seen corresponding path program 2 times [2022-07-12 18:10:10,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:10:10,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369358866] [2022-07-12 18:10:10,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:10:10,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:10:10,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:10:10,456 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:10:10,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 18:10:10,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:10:10,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:10:10,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:10:10,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:10:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 18:10:11,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:10:11,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:10:11,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369358866] [2022-07-12 18:10:11,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369358866] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:10:11,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:10:11,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:10:11,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427946941] [2022-07-12 18:10:11,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:10:11,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:10:11,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:10:11,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:10:11,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:10:11,642 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:10:15,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:10:15,598 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2022-07-12 18:10:15,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:10:15,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-07-12 18:10:15,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:10:15,599 INFO L225 Difference]: With dead ends: 168 [2022-07-12 18:10:15,599 INFO L226 Difference]: Without dead ends: 168 [2022-07-12 18:10:15,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:10:15,600 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 170 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:10:15,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 150 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-12 18:10:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-12 18:10:15,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 110. [2022-07-12 18:10:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 79 states have (on average 1.5569620253164558) internal successors, (123), 103 states have internal predecessors, (123), 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) [2022-07-12 18:10:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2022-07-12 18:10:15,603 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 49 [2022-07-12 18:10:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:10:15,603 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2022-07-12 18:10:15,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:10:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2022-07-12 18:10:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 18:10:15,604 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:10:15,604 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:10:15,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:10:15,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:10:15,811 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:10:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:10:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash -363698113, now seen corresponding path program 1 times [2022-07-12 18:10:15,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:10:15,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333297367] [2022-07-12 18:10:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:10:15,811 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:10:15,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:10:15,813 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:10:15,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-12 18:10:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:10:15,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:10:15,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:10:16,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:10:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 18:10:18,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:10:18,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:10:18,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333297367] [2022-07-12 18:10:18,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333297367] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:10:18,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:10:18,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:10:18,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120501768] [2022-07-12 18:10:18,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:10:18,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:10:18,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:10:18,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:10:18,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:10:18,292 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:10:22,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:10:22,340 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2022-07-12 18:10:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:10:22,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-07-12 18:10:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:10:22,343 INFO L225 Difference]: With dead ends: 198 [2022-07-12 18:10:22,343 INFO L226 Difference]: Without dead ends: 198 [2022-07-12 18:10:22,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:10:22,343 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 202 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:10:22,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 173 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-12 18:10:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-12 18:10:22,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 113. [2022-07-12 18:10:22,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 82 states have (on average 1.5365853658536586) internal successors, (126), 106 states have internal predecessors, (126), 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) [2022-07-12 18:10:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 134 transitions. [2022-07-12 18:10:22,346 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 134 transitions. Word has length 49 [2022-07-12 18:10:22,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:10:22,346 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 134 transitions. [2022-07-12 18:10:22,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 18:10:22,347 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 134 transitions. [2022-07-12 18:10:22,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 18:10:22,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:10:22,347 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:10:22,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:10:22,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:10:22,555 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:10:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:10:22,556 INFO L85 PathProgramCache]: Analyzing trace with hash -362068770, now seen corresponding path program 3 times [2022-07-12 18:10:22,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:10:22,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217380325] [2022-07-12 18:10:22,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:10:22,556 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:10:22,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:10:22,558 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:10:22,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-12 18:10:22,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 18:10:22,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:10:22,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-12 18:10:22,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:10:22,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:10:25,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:10:26,957 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:10:26,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:10:30,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:10:30,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:10:33,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:10:33,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-07-12 18:10:33,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:10:34,062 INFO L356 Elim1Store]: treesize reduction 69, result has 41.5 percent of original size [2022-07-12 18:10:34,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 77 [2022-07-12 18:10:39,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:10:39,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:10:42,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:10:43,090 INFO L356 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-07-12 18:10:43,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 162 treesize of output 126 [2022-07-12 18:10:43,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:10:43,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 156 [2022-07-12 18:10:43,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:10:43,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:10:43,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:10:43,367 INFO L244 Elim1Store]: Index analysis took 113 ms [2022-07-12 18:10:43,832 INFO L356 Elim1Store]: treesize reduction 141, result has 40.8 percent of original size [2022-07-12 18:10:43,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 152 [2022-07-12 18:10:51,358 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-12 18:10:51,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 253 treesize of output 142 [2022-07-12 18:10:55,460 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-12 18:10:55,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 53 [2022-07-12 18:10:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:10:58,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:11:11,368 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:11:11,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2022-07-12 18:11:11,481 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:11:11,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-07-12 18:11:13,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:11:13,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217380325] [2022-07-12 18:11:13,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217380325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:11:13,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1460358940] [2022-07-12 18:11:13,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:11:13,572 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:11:13,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:11:13,575 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) [2022-07-12 18:11:13,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-07-12 18:11:14,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 18:11:14,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:11:14,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-12 18:11:14,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:11:14,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:11:15,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:11:16,997 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:11:16,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:11:21,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:11:21,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:11:23,750 INFO L244 Elim1Store]: Index analysis took 119 ms [2022-07-12 18:11:24,819 INFO L356 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2022-07-12 18:11:24,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 66 [2022-07-12 18:11:24,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-07-12 18:11:30,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:11:30,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:11:33,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:11:33,342 INFO L356 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-07-12 18:11:33,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 114 treesize of output 90 [2022-07-12 18:11:33,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:11:33,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 108 [2022-07-12 18:11:33,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:11:33,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:11:33,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:11:33,799 INFO L244 Elim1Store]: Index analysis took 148 ms [2022-07-12 18:11:34,361 INFO L356 Elim1Store]: treesize reduction 93, result has 41.1 percent of original size [2022-07-12 18:11:34,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 112 [2022-07-12 18:11:40,966 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-12 18:11:40,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 253 treesize of output 142 [2022-07-12 18:11:45,834 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-12 18:11:45,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 53 [2022-07-12 18:11:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:11:48,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:11:57,624 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:11:57,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2022-07-12 18:11:57,740 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:11:57,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-07-12 18:11:58,033 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_123 (_ BitVec 32)) (v_arrayElimArr_23 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_24 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv1 1) (select (store |c_#valid| v_~head~0.base_123 (_ bv1 1)) (let ((.cse1 (bvadd c_~head~0.offset (_ bv4 32)))) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| v_~head~0.base_123 v_arrayElimArr_23))) (select .cse0 (select (select .cse0 c_~head~0.base) .cse1))) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_123 v_arrayElimArr_24) c_~head~0.base) .cse1)))))) (not (= (bvneg (select |c_#valid| v_~head~0.base_123)) (_ bv0 1))) (not (= c_~head~0.base (select v_arrayElimArr_23 (_ bv4 32)))) (not (= c_~head~0.offset (select v_arrayElimArr_24 (_ bv4 32)))))) is different from false [2022-07-12 18:11:58,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1460358940] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:11:58,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:11:58,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2022-07-12 18:11:58,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387473567] [2022-07-12 18:11:58,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:11:58,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 18:11:58,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:11:58,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 18:11:58,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1642, Unknown=18, NotChecked=82, Total=1892 [2022-07-12 18:11:58,065 INFO L87 Difference]: Start difference. First operand 113 states and 134 transitions. Second operand has 30 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 26 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:12:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:12:31,726 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2022-07-12 18:12:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 18:12:31,727 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 26 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2022-07-12 18:12:31,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:12:31,728 INFO L225 Difference]: With dead ends: 127 [2022-07-12 18:12:31,728 INFO L226 Difference]: Without dead ends: 127 [2022-07-12 18:12:31,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 75 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 68.1s TimeCoverageRelationStatistics Valid=297, Invalid=2747, Unknown=40, NotChecked=108, Total=3192 [2022-07-12 18:12:31,729 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 21 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:12:31,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 678 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 383 Invalid, 0 Unknown, 310 Unchecked, 11.4s Time] [2022-07-12 18:12:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-12 18:12:31,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 116. [2022-07-12 18:12:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 109 states have internal predecessors, (131), 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) [2022-07-12 18:12:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 139 transitions. [2022-07-12 18:12:31,732 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 139 transitions. Word has length 49 [2022-07-12 18:12:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:12:31,732 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 139 transitions. [2022-07-12 18:12:31,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 26 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:12:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 139 transitions. [2022-07-12 18:12:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 18:12:31,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:12:31,733 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:12:31,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-07-12 18:12:31,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:12:32,145 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 -unsat_core_generation=3 [2022-07-12 18:12:32,146 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-07-12 18:12:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:12:32,146 INFO L85 PathProgramCache]: Analyzing trace with hash -362068769, now seen corresponding path program 3 times [2022-07-12 18:12:32,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:12:32,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823172429] [2022-07-12 18:12:32,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:12:32,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:12:32,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:12:32,149 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:12:32,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-12 18:12:32,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 18:12:32,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:12:32,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-12 18:12:32,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:12:32,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:12:32,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:12:36,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:12:37,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:12:39,254 INFO L356 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2022-07-12 18:12:39,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-07-12 18:12:39,958 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-12 18:12:39,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-12 18:12:44,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:12:45,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:12:47,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:47,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-07-12 18:12:47,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:47,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-12 18:12:48,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:48,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:48,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 33 treesize of output 38 [2022-07-12 18:12:48,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:48,360 INFO L356 Elim1Store]: treesize reduction 4, result has 77.8 percent of original size [2022-07-12 18:12:48,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2022-07-12 18:12:52,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:12:53,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-12 18:12:55,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:56,142 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-12 18:12:56,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 96 treesize of output 70 [2022-07-12 18:12:56,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:56,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:56,378 INFO L244 Elim1Store]: Index analysis took 134 ms [2022-07-12 18:12:56,886 INFO L356 Elim1Store]: treesize reduction 64, result has 26.4 percent of original size [2022-07-12 18:12:56,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 48 [2022-07-12 18:12:57,137 INFO L356 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-07-12 18:12:57,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 18 [2022-07-12 18:12:57,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:12:57,684 INFO L356 Elim1Store]: treesize reduction 31, result has 48.3 percent of original size [2022-07-12 18:12:57,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 56 [2022-07-12 18:12:57,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 30