./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0102-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0102-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:04:00,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:04:00,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:04:00,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:04:00,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:04:00,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:04:00,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:04:00,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:04:00,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:04:00,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:04:00,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:04:00,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:04:00,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:04:00,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:04:00,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:04:00,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:04:00,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:04:00,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:04:00,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:04:00,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:04:00,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:04:00,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:04:00,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:04:00,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:04:00,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:04:00,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:04:00,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:04:00,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:04:00,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:04:00,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:04:00,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:04:00,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:04:00,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:04:00,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:04:00,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:04:00,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:04:00,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:04:00,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:04:00,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:04:00,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:04:00,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:04:00,787 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:04:00,808 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:04:00,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:04:00,809 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:04:00,809 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:04:00,810 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:04:00,810 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:04:00,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:04:00,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:04:00,810 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:04:00,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:04:00,811 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:04:00,811 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:04:00,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:04:00,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:04:00,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:04:00,812 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:04:00,812 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:04:00,812 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:04:00,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:04:00,812 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:04:00,813 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:04:00,813 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:04:00,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:04:00,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:04:00,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:04:00,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:04:00,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:04:00,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:04:00,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:04:00,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:04:00,814 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:04:00,814 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f [2021-12-21 18:04:00,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:04:01,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:04:01,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:04:01,008 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:04:01,008 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:04:01,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0102-1.i [2021-12-21 18:04:01,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1c463ab9/af45f7d842a34ba8904da97f596596f1/FLAGa5b78c774 [2021-12-21 18:04:01,478 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:04:01,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0102-1.i [2021-12-21 18:04:01,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1c463ab9/af45f7d842a34ba8904da97f596596f1/FLAGa5b78c774 [2021-12-21 18:04:01,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1c463ab9/af45f7d842a34ba8904da97f596596f1 [2021-12-21 18:04:01,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:04:01,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:04:01,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:04:01,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:04:01,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:04:01,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:04:01" (1/1) ... [2021-12-21 18:04:01,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3735f768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:01, skipping insertion in model container [2021-12-21 18:04:01,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:04:01" (1/1) ... [2021-12-21 18:04:01,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:04:01,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:04:02,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:04:02,208 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-21 18:04:02,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7027a410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:02, skipping insertion in model container [2021-12-21 18:04:02,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:04:02,209 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-21 18:04:02,211 INFO L158 Benchmark]: Toolchain (without parser) took 309.78ms. Allocated memory is still 92.3MB. Free memory was 58.4MB in the beginning and 65.5MB in the end (delta: -7.1MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-12-21 18:04:02,212 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 75.5MB. Free memory was 40.1MB in the beginning and 40.0MB in the end (delta: 41.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 18:04:02,213 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.74ms. Allocated memory is still 92.3MB. Free memory was 58.2MB in the beginning and 65.5MB in the end (delta: -7.3MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-12-21 18:04:02,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 75.5MB. Free memory was 40.1MB in the beginning and 40.0MB in the end (delta: 41.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 293.74ms. Allocated memory is still 92.3MB. Free memory was 58.2MB in the beginning and 65.5MB in the end (delta: -7.3MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 551]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0102-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:04:03,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:04:03,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:04:03,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:04:03,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:04:03,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:04:03,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:04:03,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:04:03,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:04:03,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:04:03,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:04:03,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:04:03,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:04:03,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:04:03,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:04:03,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:04:03,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:04:03,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:04:03,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:04:03,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:04:03,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:04:03,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:04:03,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:04:03,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:04:03,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:04:03,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:04:03,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:04:03,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:04:03,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:04:03,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:04:03,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:04:03,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:04:03,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:04:03,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:04:03,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:04:03,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:04:03,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:04:03,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:04:03,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:04:03,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:04:03,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:04:03,800 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-21 18:04:03,814 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:04:03,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:04:03,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:04:03,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:04:03,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:04:03,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:04:03,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:04:03,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:04:03,826 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:04:03,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:04:03,826 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:04:03,826 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:04:03,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:04:03,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:04:03,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:04:03,827 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:04:03,827 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:04:03,827 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:04:03,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:04:03,828 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:04:03,828 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 18:04:03,828 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 18:04:03,828 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:04:03,828 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:04:03,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:04:03,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:04:03,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:04:03,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:04:03,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:04:03,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:04:03,836 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 18:04:03,836 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 18:04:03,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:04:03,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 18:04:03,836 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f [2021-12-21 18:04:04,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:04:04,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:04:04,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:04:04,138 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:04:04,151 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:04:04,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0102-1.i [2021-12-21 18:04:04,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef846c392/13fdfbf9caf5451f8c3679240880d408/FLAGd7086178d [2021-12-21 18:04:04,620 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:04:04,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0102-1.i [2021-12-21 18:04:04,641 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef846c392/13fdfbf9caf5451f8c3679240880d408/FLAGd7086178d [2021-12-21 18:04:04,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef846c392/13fdfbf9caf5451f8c3679240880d408 [2021-12-21 18:04:04,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:04:04,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:04:04,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:04:04,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:04:04,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:04:04,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:04:04" (1/1) ... [2021-12-21 18:04:04,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@642d18af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:04, skipping insertion in model container [2021-12-21 18:04:04,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:04:04" (1/1) ... [2021-12-21 18:04:04,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:04:04,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:04:04,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:04:04,963 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-21 18:04:04,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:04:04,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:04:04,993 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:04:05,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:04:05,052 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:04:05,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:05 WrapperNode [2021-12-21 18:04:05,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:04:05,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:04:05,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:04:05,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:04:05,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:05" (1/1) ... [2021-12-21 18:04:05,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:05" (1/1) ... [2021-12-21 18:04:05,100 INFO L137 Inliner]: procedures = 136, calls = 38, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 86 [2021-12-21 18:04:05,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:04:05,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:04:05,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:04:05,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:04:05,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:05" (1/1) ... [2021-12-21 18:04:05,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:05" (1/1) ... [2021-12-21 18:04:05,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:05" (1/1) ... [2021-12-21 18:04:05,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:05" (1/1) ... [2021-12-21 18:04:05,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:05" (1/1) ... [2021-12-21 18:04:05,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:05" (1/1) ... [2021-12-21 18:04:05,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:05" (1/1) ... [2021-12-21 18:04:05,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:04:05,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:04:05,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:04:05,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:04:05,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:05" (1/1) ... [2021-12-21 18:04:05,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:04:05,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:05,193 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) [2021-12-21 18:04:05,202 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 [2021-12-21 18:04:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-12-21 18:04:05,226 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-12-21 18:04:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 18:04:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 18:04:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure create_sub_list [2021-12-21 18:04:05,227 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sub_list [2021-12-21 18:04:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 18:04:05,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 18:04:05,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 18:04:05,231 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sub [2021-12-21 18:04:05,232 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sub [2021-12-21 18:04:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-21 18:04:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:04:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 18:04:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 18:04:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:04:05,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:04:05,344 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:04:05,346 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:04:05,681 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:04:05,688 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:04:05,690 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 18:04:05,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:04:05 BoogieIcfgContainer [2021-12-21 18:04:05,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:04:05,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:04:05,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:04:05,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:04:05,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:04:04" (1/3) ... [2021-12-21 18:04:05,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c7712ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:04:05, skipping insertion in model container [2021-12-21 18:04:05,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:05" (2/3) ... [2021-12-21 18:04:05,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c7712ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:04:05, skipping insertion in model container [2021-12-21 18:04:05,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:04:05" (3/3) ... [2021-12-21 18:04:05,704 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0102-1.i [2021-12-21 18:04:05,708 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:04:05,708 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-12-21 18:04:05,743 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:04:05,749 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 18:04:05,749 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-12-21 18:04:05,767 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 46 states have (on average 1.891304347826087) internal successors, (87), 77 states have internal predecessors, (87), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 18:04:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-21 18:04:05,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:05,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-21 18:04:05,773 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:05,777 INFO L85 PathProgramCache]: Analyzing trace with hash 106012329, now seen corresponding path program 1 times [2021-12-21 18:04:05,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:05,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647962918] [2021-12-21 18:04:05,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:05,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:05,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:05,804 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) [2021-12-21 18:04:05,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 18:04:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:05,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-21 18:04:05,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:05,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:05,903 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:05,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647962918] [2021-12-21 18:04:05,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647962918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:05,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:05,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:04:05,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183948611] [2021-12-21 18:04:05,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:05,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 18:04:05,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:05,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 18:04:05,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:04:05,933 INFO L87 Difference]: Start difference. First operand has 87 states, 46 states have (on average 1.891304347826087) internal successors, (87), 77 states have internal predecessors, (87), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:05,953 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-12-21 18:04:05,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 18:04:05,954 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-21 18:04:05,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:05,960 INFO L225 Difference]: With dead ends: 87 [2021-12-21 18:04:05,961 INFO L226 Difference]: Without dead ends: 85 [2021-12-21 18:04:05,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:04:05,965 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:05,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:04:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-21 18:04:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-12-21 18:04:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 75 states have internal predecessors, (79), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 18:04:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2021-12-21 18:04:06,004 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 5 [2021-12-21 18:04:06,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:06,004 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2021-12-21 18:04:06,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2021-12-21 18:04:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:04:06,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:06,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:06,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-21 18:04:06,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:06,213 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting create_sub_listErr0REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:06,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:06,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1219357814, now seen corresponding path program 1 times [2021-12-21 18:04:06,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:06,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411100547] [2021-12-21 18:04:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:06,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:06,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:06,231 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) [2021-12-21 18:04:06,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 18:04:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:06,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 18:04:06,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:06,342 INFO L387 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 [2021-12-21 18:04:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:06,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:06,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:06,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411100547] [2021-12-21 18:04:06,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411100547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:06,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:06,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:04:06,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103366632] [2021-12-21 18:04:06,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:06,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:04:06,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:06,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:04:06,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:04:06,382 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:06,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:06,593 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2021-12-21 18:04:06,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:04:06,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 18:04:06,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:06,596 INFO L225 Difference]: With dead ends: 91 [2021-12-21 18:04:06,596 INFO L226 Difference]: Without dead ends: 91 [2021-12-21 18:04:06,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:04:06,597 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 39 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:06,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 190 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:04:06,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-21 18:04:06,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2021-12-21 18:04:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 45 states have (on average 1.711111111111111) internal successors, (77), 73 states have internal predecessors, (77), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 18:04:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-12-21 18:04:06,605 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 7 [2021-12-21 18:04:06,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:06,606 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-12-21 18:04:06,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:06,606 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-12-21 18:04:06,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:04:06,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:06,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:06,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:06,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:06,814 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting create_sub_listErr1REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:06,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:06,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1219357813, now seen corresponding path program 1 times [2021-12-21 18:04:06,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:06,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328739066] [2021-12-21 18:04:06,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:06,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:06,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:06,832 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) [2021-12-21 18:04:06,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 18:04:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:06,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 18:04:06,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:06,888 INFO L387 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 [2021-12-21 18:04:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:06,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:06,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:06,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328739066] [2021-12-21 18:04:06,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328739066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:06,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:06,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:04:06,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645459975] [2021-12-21 18:04:06,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:06,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:04:06,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:06,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:04:06,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:04:06,939 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:07,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:07,093 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-12-21 18:04:07,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:04:07,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 18:04:07,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:07,095 INFO L225 Difference]: With dead ends: 87 [2021-12-21 18:04:07,095 INFO L226 Difference]: Without dead ends: 87 [2021-12-21 18:04:07,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:04:07,096 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 5 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:07,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 256 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:04:07,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-21 18:04:07,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-12-21 18:04:07,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 18:04:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2021-12-21 18:04:07,102 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 7 [2021-12-21 18:04:07,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:07,102 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2021-12-21 18:04:07,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:07,103 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2021-12-21 18:04:07,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:04:07,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:07,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:07,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:07,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:07,310 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting create_sub_listErr4REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:07,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:07,311 INFO L85 PathProgramCache]: Analyzing trace with hash -778231822, now seen corresponding path program 1 times [2021-12-21 18:04:07,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:07,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521295802] [2021-12-21 18:04:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:07,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:07,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:07,313 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) [2021-12-21 18:04:07,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-21 18:04:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:07,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:04:07,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:07,382 INFO L387 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 [2021-12-21 18:04:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:07,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:07,392 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:07,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521295802] [2021-12-21 18:04:07,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521295802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:07,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:07,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:04:07,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382435530] [2021-12-21 18:04:07,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:07,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:04:07,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:07,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:04:07,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:04:07,394 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:07,459 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2021-12-21 18:04:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:04:07,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 18:04:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:07,460 INFO L225 Difference]: With dead ends: 86 [2021-12-21 18:04:07,460 INFO L226 Difference]: Without dead ends: 86 [2021-12-21 18:04:07,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:04:07,461 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 6 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:07,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 132 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:04:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-21 18:04:07,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-12-21 18:04:07,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 74 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 18:04:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2021-12-21 18:04:07,465 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 11 [2021-12-21 18:04:07,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:07,465 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2021-12-21 18:04:07,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2021-12-21 18:04:07,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:04:07,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:07,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:07,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:07,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:07,680 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting create_sub_listErr5REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:07,681 INFO L85 PathProgramCache]: Analyzing trace with hash -778231821, now seen corresponding path program 1 times [2021-12-21 18:04:07,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:07,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316651676] [2021-12-21 18:04:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:07,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:07,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:07,685 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) [2021-12-21 18:04:07,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-21 18:04:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:07,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:04:07,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:07,759 INFO L387 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 [2021-12-21 18:04:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:07,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:07,776 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:07,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316651676] [2021-12-21 18:04:07,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316651676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:07,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:07,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:04:07,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644891299] [2021-12-21 18:04:07,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:07,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:04:07,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:07,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:04:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:04:07,778 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:07,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:07,849 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2021-12-21 18:04:07,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:04:07,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 18:04:07,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:07,850 INFO L225 Difference]: With dead ends: 85 [2021-12-21 18:04:07,850 INFO L226 Difference]: Without dead ends: 85 [2021-12-21 18:04:07,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:04:07,851 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 5 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:07,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 136 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:04:07,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-21 18:04:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-12-21 18:04:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 48 states have (on average 1.625) internal successors, (78), 73 states have internal predecessors, (78), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 18:04:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2021-12-21 18:04:07,855 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 11 [2021-12-21 18:04:07,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:07,855 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2021-12-21 18:04:07,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:07,855 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2021-12-21 18:04:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:04:07,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:07,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:07,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:08,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:08,063 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting list_add_tailErr1REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:08,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:08,063 INFO L85 PathProgramCache]: Analyzing trace with hash -70636768, now seen corresponding path program 1 times [2021-12-21 18:04:08,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:08,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888187643] [2021-12-21 18:04:08,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:08,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:08,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:08,066 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) [2021-12-21 18:04:08,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-21 18:04:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:08,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 18:04:08,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:08,165 INFO L387 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 [2021-12-21 18:04:08,169 INFO L387 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 [2021-12-21 18:04:08,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:08,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:04:08,263 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:04:08,263 INFO L387 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 12 treesize of output 12 [2021-12-21 18:04:08,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:08,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:08,317 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:08,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888187643] [2021-12-21 18:04:08,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888187643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:08,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:08,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:04:08,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450144985] [2021-12-21 18:04:08,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:08,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:04:08,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:08,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:04:08,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:04:08,319 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:08,671 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2021-12-21 18:04:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:04:08,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-21 18:04:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:08,672 INFO L225 Difference]: With dead ends: 112 [2021-12-21 18:04:08,672 INFO L226 Difference]: Without dead ends: 112 [2021-12-21 18:04:08,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:04:08,673 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 54 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:08,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 332 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:04:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-21 18:04:08,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 102. [2021-12-21 18:04:08,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 63 states have (on average 1.6349206349206349) internal successors, (103), 89 states have internal predecessors, (103), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-21 18:04:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2021-12-21 18:04:08,680 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 14 [2021-12-21 18:04:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:08,680 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2021-12-21 18:04:08,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2021-12-21 18:04:08,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:04:08,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:08,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:08,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:08,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:08,881 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting list_add_tailErr0REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:08,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:08,881 INFO L85 PathProgramCache]: Analyzing trace with hash -70636769, now seen corresponding path program 1 times [2021-12-21 18:04:08,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:08,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638643235] [2021-12-21 18:04:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:08,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:08,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:08,885 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) [2021-12-21 18:04:08,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-21 18:04:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:08,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 18:04:08,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:08,993 INFO L387 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 [2021-12-21 18:04:09,028 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-21 18:04:09,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2021-12-21 18:04:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:09,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:09,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:09,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638643235] [2021-12-21 18:04:09,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638643235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:09,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:09,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:04:09,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016317841] [2021-12-21 18:04:09,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:09,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:04:09,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:09,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:04:09,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:04:09,072 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:09,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:09,364 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2021-12-21 18:04:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:04:09,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-21 18:04:09,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:09,366 INFO L225 Difference]: With dead ends: 131 [2021-12-21 18:04:09,366 INFO L226 Difference]: Without dead ends: 131 [2021-12-21 18:04:09,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:04:09,366 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 87 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:09,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 278 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:04:09,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-21 18:04:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 112. [2021-12-21 18:04:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 98 states have internal predecessors, (120), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-21 18:04:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2021-12-21 18:04:09,372 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 14 [2021-12-21 18:04:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:09,372 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2021-12-21 18:04:09,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2021-12-21 18:04:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 18:04:09,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:09,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:09,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:09,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:09,580 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting list_add_tailErr2REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:09,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:09,581 INFO L85 PathProgramCache]: Analyzing trace with hash 837542848, now seen corresponding path program 1 times [2021-12-21 18:04:09,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:09,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967905227] [2021-12-21 18:04:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:09,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:09,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:09,583 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) [2021-12-21 18:04:09,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-21 18:04:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:09,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:04:09,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:09,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:09,710 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:09,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967905227] [2021-12-21 18:04:09,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967905227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:09,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:09,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:04:09,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019791225] [2021-12-21 18:04:09,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:09,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:04:09,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:09,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:04:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:04:09,711 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:09,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:09,786 INFO L93 Difference]: Finished difference Result 111 states and 131 transitions. [2021-12-21 18:04:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:04:09,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-21 18:04:09,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:09,787 INFO L225 Difference]: With dead ends: 111 [2021-12-21 18:04:09,787 INFO L226 Difference]: Without dead ends: 111 [2021-12-21 18:04:09,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:04:09,788 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 27 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:09,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 169 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:04:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-21 18:04:09,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-12-21 18:04:09,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 72 states have (on average 1.625) internal successors, (117), 97 states have internal predecessors, (117), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-21 18:04:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2021-12-21 18:04:09,791 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 16 [2021-12-21 18:04:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:09,795 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2021-12-21 18:04:09,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:09,795 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2021-12-21 18:04:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 18:04:09,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:09,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:09,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-21 18:04:09,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:09,997 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting list_add_tailErr3REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:09,997 INFO L85 PathProgramCache]: Analyzing trace with hash 837542849, now seen corresponding path program 1 times [2021-12-21 18:04:09,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:09,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213108016] [2021-12-21 18:04:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:09,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:09,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:09,999 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:04:10,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-21 18:04:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:10,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 18:04:10,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:10,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:10,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:10,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213108016] [2021-12-21 18:04:10,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213108016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:10,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:10,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 18:04:10,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780943737] [2021-12-21 18:04:10,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:10,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:04:10,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:10,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:04:10,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:04:10,191 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:10,451 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2021-12-21 18:04:10,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:04:10,452 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-21 18:04:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:10,452 INFO L225 Difference]: With dead ends: 119 [2021-12-21 18:04:10,452 INFO L226 Difference]: Without dead ends: 119 [2021-12-21 18:04:10,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:04:10,453 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 97 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:10,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 535 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:04:10,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-21 18:04:10,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-12-21 18:04:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 72 states have (on average 1.6111111111111112) internal successors, (116), 97 states have internal predecessors, (116), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-21 18:04:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2021-12-21 18:04:10,456 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 16 [2021-12-21 18:04:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:10,456 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2021-12-21 18:04:10,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2021-12-21 18:04:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 18:04:10,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:10,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:10,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:10,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:10,665 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting list_add_tailErr4REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:10,665 INFO L85 PathProgramCache]: Analyzing trace with hash 194024551, now seen corresponding path program 1 times [2021-12-21 18:04:10,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:10,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707258951] [2021-12-21 18:04:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:10,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:10,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:10,667 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) [2021-12-21 18:04:10,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-21 18:04:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:10,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 18:04:10,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:10,775 INFO L387 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 [2021-12-21 18:04:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:10,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:10,804 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:10,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707258951] [2021-12-21 18:04:10,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707258951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:10,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:10,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:04:10,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282772967] [2021-12-21 18:04:10,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:10,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:04:10,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:10,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:04:10,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:04:10,805 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:10,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:10,993 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2021-12-21 18:04:10,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:04:10,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-21 18:04:10,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:10,994 INFO L225 Difference]: With dead ends: 118 [2021-12-21 18:04:10,994 INFO L226 Difference]: Without dead ends: 118 [2021-12-21 18:04:10,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:04:10,995 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 49 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:10,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 251 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:04:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-21 18:04:10,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 110. [2021-12-21 18:04:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 72 states have (on average 1.5416666666666667) internal successors, (111), 96 states have internal predecessors, (111), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-21 18:04:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2021-12-21 18:04:10,999 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 17 [2021-12-21 18:04:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:11,000 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2021-12-21 18:04:11,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2021-12-21 18:04:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 18:04:11,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:11,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:11,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:11,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:11,208 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting list_add_tailErr5REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:11,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash 194024552, now seen corresponding path program 1 times [2021-12-21 18:04:11,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:11,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090201601] [2021-12-21 18:04:11,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:11,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:11,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:11,214 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) [2021-12-21 18:04:11,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-21 18:04:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:11,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:04:11,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:11,310 INFO L387 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 [2021-12-21 18:04:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:11,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:11,394 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:11,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090201601] [2021-12-21 18:04:11,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090201601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:11,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:11,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:04:11,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699708749] [2021-12-21 18:04:11,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:11,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:04:11,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:11,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:04:11,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:04:11,396 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:11,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:11,618 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2021-12-21 18:04:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:04:11,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-21 18:04:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:11,621 INFO L225 Difference]: With dead ends: 116 [2021-12-21 18:04:11,621 INFO L226 Difference]: Without dead ends: 116 [2021-12-21 18:04:11,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:04:11,621 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 36 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:11,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 271 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:04:11,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-21 18:04:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2021-12-21 18:04:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 72 states have (on average 1.4861111111111112) internal successors, (107), 96 states have internal predecessors, (107), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-21 18:04:11,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-12-21 18:04:11,624 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 17 [2021-12-21 18:04:11,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:11,625 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-12-21 18:04:11,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:11,625 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-12-21 18:04:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 18:04:11,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:11,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:11,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:11,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:11,833 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting list_add_tailErr8REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:11,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:11,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1774001130, now seen corresponding path program 1 times [2021-12-21 18:04:11,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:11,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732771324] [2021-12-21 18:04:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:11,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:11,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:11,835 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:04:11,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-21 18:04:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:11,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 18:04:11,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:11,997 INFO L387 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 [2021-12-21 18:04:12,022 INFO L387 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 [2021-12-21 18:04:12,060 INFO L353 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-21 18:04:12,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-21 18:04:12,083 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:04:12,084 INFO L387 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 12 treesize of output 12 [2021-12-21 18:04:12,119 INFO L387 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 16 treesize of output 18 [2021-12-21 18:04:12,182 INFO L387 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 7 [2021-12-21 18:04:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:12,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:12,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:12,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732771324] [2021-12-21 18:04:12,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732771324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:12,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:12,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 18:04:12,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893045863] [2021-12-21 18:04:12,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:12,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:04:12,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:12,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:04:12,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:04:12,216 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:12,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:12,785 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2021-12-21 18:04:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 18:04:12,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-21 18:04:12,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:12,786 INFO L225 Difference]: With dead ends: 145 [2021-12-21 18:04:12,786 INFO L226 Difference]: Without dead ends: 145 [2021-12-21 18:04:12,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-12-21 18:04:12,787 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 57 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:12,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 443 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:04:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-21 18:04:12,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2021-12-21 18:04:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 92 states have (on average 1.423913043478261) internal successors, (131), 116 states have internal predecessors, (131), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-21 18:04:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2021-12-21 18:04:12,791 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 19 [2021-12-21 18:04:12,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:12,791 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2021-12-21 18:04:12,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:12,791 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2021-12-21 18:04:12,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 18:04:12,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:12,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:12,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:12,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:12,999 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting list_add_tailErr9REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:13,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1774001131, now seen corresponding path program 1 times [2021-12-21 18:04:13,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:13,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438132217] [2021-12-21 18:04:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:13,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:13,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:13,001 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) [2021-12-21 18:04:13,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-21 18:04:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:13,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-21 18:04:13,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:13,225 INFO L387 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 [2021-12-21 18:04:13,229 INFO L387 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 [2021-12-21 18:04:13,295 INFO L387 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 [2021-12-21 18:04:13,300 INFO L387 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 [2021-12-21 18:04:13,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:13,339 INFO L387 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 21 treesize of output 20 [2021-12-21 18:04:13,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:13,350 INFO L387 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 21 treesize of output 20 [2021-12-21 18:04:13,373 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:04:13,373 INFO L387 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 12 treesize of output 12 [2021-12-21 18:04:13,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:04:13,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 18:04:13,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 18:04:13,526 INFO L387 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 [2021-12-21 18:04:13,529 INFO L387 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 [2021-12-21 18:04:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:13,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:13,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:13,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438132217] [2021-12-21 18:04:13,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438132217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:13,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:13,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 18:04:13,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980201288] [2021-12-21 18:04:13,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:13,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:04:13,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:13,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:04:13,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:04:13,581 INFO L87 Difference]: Start difference. First operand 132 states and 149 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:14,288 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2021-12-21 18:04:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 18:04:14,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-21 18:04:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:14,290 INFO L225 Difference]: With dead ends: 135 [2021-12-21 18:04:14,290 INFO L226 Difference]: Without dead ends: 135 [2021-12-21 18:04:14,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-12-21 18:04:14,291 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 30 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:14,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 509 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 18:04:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-21 18:04:14,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-12-21 18:04:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 94 states have (on average 1.4042553191489362) internal successors, (132), 119 states have internal predecessors, (132), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-21 18:04:14,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2021-12-21 18:04:14,295 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 19 [2021-12-21 18:04:14,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:14,295 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2021-12-21 18:04:14,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:14,295 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2021-12-21 18:04:14,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 18:04:14,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:14,296 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:14,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:14,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:14,522 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting create_sub_listErr1REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:14,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:14,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1031850971, now seen corresponding path program 1 times [2021-12-21 18:04:14,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:14,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476817335] [2021-12-21 18:04:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:14,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:14,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:14,524 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:04:14,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-21 18:04:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:14,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 18:04:14,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:14,686 INFO L387 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 [2021-12-21 18:04:14,690 INFO L387 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 [2021-12-21 18:04:16,789 INFO L387 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 [2021-12-21 18:04:16,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:16,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:04:16,854 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:04:16,854 INFO L387 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 12 treesize of output 12 [2021-12-21 18:04:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:16,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:17,214 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:17,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476817335] [2021-12-21 18:04:17,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476817335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:04:17,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [152054254] [2021-12-21 18:04:17,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:17,214 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:04:17,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:04:17,228 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 18:04:17,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-21 18:04:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:17,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-21 18:04:17,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:17,521 INFO L387 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 [2021-12-21 18:04:17,526 INFO L387 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 [2021-12-21 18:04:17,702 INFO L387 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 [2021-12-21 18:04:17,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:17,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:04:17,965 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:04:17,965 INFO L387 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 12 treesize of output 12 [2021-12-21 18:04:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:18,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:18,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [152054254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:04:18,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:04:18,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 13 [2021-12-21 18:04:18,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088982525] [2021-12-21 18:04:18,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:04:18,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 18:04:18,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:18,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 18:04:18,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=295, Unknown=1, NotChecked=0, Total=342 [2021-12-21 18:04:18,602 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 18:04:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:25,720 INFO L93 Difference]: Finished difference Result 163 states and 184 transitions. [2021-12-21 18:04:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:04:25,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-12-21 18:04:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:25,721 INFO L225 Difference]: With dead ends: 163 [2021-12-21 18:04:25,722 INFO L226 Difference]: Without dead ends: 163 [2021-12-21 18:04:25,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=78, Invalid=470, Unknown=4, NotChecked=0, Total=552 [2021-12-21 18:04:25,722 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 78 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:25,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 343 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 450 Invalid, 0 Unknown, 136 Unchecked, 0.9s Time] [2021-12-21 18:04:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-21 18:04:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 143. [2021-12-21 18:04:25,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 100 states have (on average 1.39) internal successors, (139), 124 states have internal predecessors, (139), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-12-21 18:04:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 160 transitions. [2021-12-21 18:04:25,726 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 160 transitions. Word has length 29 [2021-12-21 18:04:25,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:25,727 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 160 transitions. [2021-12-21 18:04:25,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 18:04:25,727 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 160 transitions. [2021-12-21 18:04:25,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 18:04:25,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:25,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:25,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-12-21 18:04:25,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:26,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:26,141 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting list_add_tailErr1REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:26,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:26,141 INFO L85 PathProgramCache]: Analyzing trace with hash 343570640, now seen corresponding path program 1 times [2021-12-21 18:04:26,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:26,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865094525] [2021-12-21 18:04:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:26,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:26,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:26,143 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) [2021-12-21 18:04:26,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-21 18:04:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:26,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-21 18:04:26,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:26,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:26,846 INFO L387 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 14 treesize of output 16 [2021-12-21 18:04:26,857 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:04:26,857 INFO L387 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 15 treesize of output 15 [2021-12-21 18:04:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:27,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:28,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:04:28,061 INFO L387 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 32 treesize of output 26 [2021-12-21 18:04:28,556 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-21 18:04:28,556 INFO L387 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 38 treesize of output 32 [2021-12-21 18:04:28,567 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:04:28,567 INFO L387 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 19 treesize of output 18 [2021-12-21 18:04:29,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:04:29,313 INFO L387 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 38 treesize of output 40 [2021-12-21 18:04:29,419 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:04:29,420 INFO L387 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 16 treesize of output 15 [2021-12-21 18:04:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:29,601 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:29,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865094525] [2021-12-21 18:04:29,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865094525] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:04:29,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:04:29,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-12-21 18:04:29,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411611699] [2021-12-21 18:04:29,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:04:29,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-21 18:04:29,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:29,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-21 18:04:29,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-12-21 18:04:29,603 INFO L87 Difference]: Start difference. First operand 143 states and 160 transitions. Second operand has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:04:32,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:32,283 INFO L93 Difference]: Finished difference Result 151 states and 164 transitions. [2021-12-21 18:04:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 18:04:32,284 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-12-21 18:04:32,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:32,284 INFO L225 Difference]: With dead ends: 151 [2021-12-21 18:04:32,284 INFO L226 Difference]: Without dead ends: 151 [2021-12-21 18:04:32,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 18:04:32,285 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 249 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:32,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 841 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 721 Invalid, 0 Unknown, 299 Unchecked, 1.6s Time] [2021-12-21 18:04:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-21 18:04:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 140. [2021-12-21 18:04:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 99 states have (on average 1.3333333333333333) internal successors, (132), 121 states have internal predecessors, (132), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-12-21 18:04:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 153 transitions. [2021-12-21 18:04:32,289 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 153 transitions. Word has length 36 [2021-12-21 18:04:32,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:32,290 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 153 transitions. [2021-12-21 18:04:32,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:04:32,290 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 153 transitions. [2021-12-21 18:04:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 18:04:32,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:32,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:32,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:32,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:04:32,494 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting list_add_tailErr8REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:32,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:32,494 INFO L85 PathProgramCache]: Analyzing trace with hash 2012582842, now seen corresponding path program 1 times [2021-12-21 18:04:32,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:32,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716317216] [2021-12-21 18:04:32,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:32,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:32,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:32,503 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) [2021-12-21 18:04:32,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-21 18:04:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:32,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-21 18:04:32,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:32,915 INFO L387 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 [2021-12-21 18:04:32,956 INFO L387 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 [2021-12-21 18:04:32,962 INFO L387 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 [2021-12-21 18:04:32,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:32,991 INFO L387 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 21 treesize of output 20 [2021-12-21 18:04:32,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:32,997 INFO L387 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 21 treesize of output 20 [2021-12-21 18:04:33,033 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-21 18:04:33,033 INFO L387 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 18 treesize of output 25 [2021-12-21 18:04:33,108 INFO L387 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 16 treesize of output 18 [2021-12-21 18:04:33,131 INFO L387 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 16 treesize of output 18 [2021-12-21 18:04:33,152 INFO L387 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 7 treesize of output 3 [2021-12-21 18:04:33,156 INFO L387 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 7 treesize of output 3 [2021-12-21 18:04:34,162 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2021-12-21 18:04:34,184 INFO L353 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2021-12-21 18:04:34,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 87 [2021-12-21 18:04:34,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:34,190 INFO L387 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 91 treesize of output 71 [2021-12-21 18:04:34,195 INFO L387 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 42 treesize of output 24 [2021-12-21 18:04:34,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 40 treesize of output 30 [2021-12-21 18:04:34,353 INFO L353 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-21 18:04:34,354 INFO L387 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 34 treesize of output 55 [2021-12-21 18:04:34,480 INFO L387 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 35 treesize of output 33 [2021-12-21 18:04:34,747 INFO L387 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 36 treesize of output 20 [2021-12-21 18:04:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:35,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:35,423 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_21| (_ BitVec 32)) (v_ArrVal_713 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_21| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_21| v_ArrVal_713) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))) (_ bv1 1)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_21|)))))) is different from false [2021-12-21 18:04:36,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:36,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716317216] [2021-12-21 18:04:36,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716317216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:04:36,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1973661819] [2021-12-21 18:04:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:36,183 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:04:36,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:04:36,185 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) [2021-12-21 18:04:36,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-12-21 18:04:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:36,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-21 18:04:36,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:36,764 INFO L387 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 [2021-12-21 18:04:36,792 INFO L387 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 [2021-12-21 18:04:36,797 INFO L387 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 [2021-12-21 18:04:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:36,810 INFO L387 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 21 treesize of output 20 [2021-12-21 18:04:36,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:36,818 INFO L387 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 21 treesize of output 20 [2021-12-21 18:04:36,850 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-21 18:04:36,851 INFO L387 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 18 treesize of output 25 [2021-12-21 18:04:36,911 INFO L387 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 16 treesize of output 18 [2021-12-21 18:04:36,921 INFO L387 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 16 treesize of output 18 [2021-12-21 18:04:36,938 INFO L387 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 7 treesize of output 3 [2021-12-21 18:04:36,942 INFO L387 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 7 treesize of output 3 [2021-12-21 18:04:37,509 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2021-12-21 18:04:37,528 INFO L353 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2021-12-21 18:04:37,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 87 [2021-12-21 18:04:37,534 INFO L387 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 44 treesize of output 26 [2021-12-21 18:04:37,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:37,540 INFO L387 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 79 treesize of output 59 [2021-12-21 18:04:37,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 40 treesize of output 22 [2021-12-21 18:04:37,632 INFO L353 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-21 18:04:37,633 INFO L387 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 34 treesize of output 55 [2021-12-21 18:04:37,746 INFO L387 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 35 treesize of output 33 [2021-12-21 18:04:37,971 INFO L387 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 28 treesize of output 16 [2021-12-21 18:04:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:38,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:38,320 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_23| (_ BitVec 32)) (v_ArrVal_834 (_ BitVec 1)) (v_ArrVal_713 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_23|)) (_ bv0 1))) (= (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_23| v_ArrVal_834) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_23| v_ArrVal_713) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))) (_ bv1 1)))) is different from false [2021-12-21 18:04:39,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1973661819] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:04:39,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:04:39,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 27 [2021-12-21 18:04:39,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009118862] [2021-12-21 18:04:39,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:04:39,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-21 18:04:39,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:04:39,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-21 18:04:39,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1146, Unknown=16, NotChecked=138, Total=1406 [2021-12-21 18:04:39,369 INFO L87 Difference]: Start difference. First operand 140 states and 153 transitions. Second operand has 28 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:04:40,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:40,262 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2021-12-21 18:04:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 18:04:40,263 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-21 18:04:40,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:40,264 INFO L225 Difference]: With dead ends: 151 [2021-12-21 18:04:40,264 INFO L226 Difference]: Without dead ends: 151 [2021-12-21 18:04:40,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=153, Invalid=1561, Unknown=16, NotChecked=162, Total=1892 [2021-12-21 18:04:40,265 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 19 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 556 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:40,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 962 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 389 Invalid, 0 Unknown, 556 Unchecked, 0.5s Time] [2021-12-21 18:04:40,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-21 18:04:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-12-21 18:04:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 109 states have (on average 1.311926605504587) internal successors, (143), 131 states have internal predecessors, (143), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 11 states have call successors, (12) [2021-12-21 18:04:40,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2021-12-21 18:04:40,268 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 35 [2021-12-21 18:04:40,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:40,269 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2021-12-21 18:04:40,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:04:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2021-12-21 18:04:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 18:04:40,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:40,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:40,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-12-21 18:04:40,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-21 18:04:40,679 WARN L452 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 [2021-12-21 18:04:40,680 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting list_add_tailErr9REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-21 18:04:40,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:40,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2012582843, now seen corresponding path program 1 times [2021-12-21 18:04:40,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:04:40,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21657207] [2021-12-21 18:04:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:40,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:04:40,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:04:40,682 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) [2021-12-21 18:04:40,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-21 18:04:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:41,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-21 18:04:41,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:41,068 INFO L387 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 [2021-12-21 18:04:41,109 INFO L387 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 [2021-12-21 18:04:41,116 INFO L387 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 [2021-12-21 18:04:41,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:41,142 INFO L387 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 21 treesize of output 20 [2021-12-21 18:04:41,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:41,148 INFO L387 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 21 treesize of output 20 [2021-12-21 18:04:41,193 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-21 18:04:41,194 INFO L387 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 18 treesize of output 25 [2021-12-21 18:04:41,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:04:41,284 INFO L387 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 16 treesize of output 18 [2021-12-21 18:04:41,293 INFO L387 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 16 treesize of output 18 [2021-12-21 18:04:41,319 INFO L387 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 7 treesize of output 3 [2021-12-21 18:04:41,323 INFO L387 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 7 treesize of output 3 [2021-12-21 18:04:42,771 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 91 [2021-12-21 18:04:42,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:42,780 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2021-12-21 18:04:42,785 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 38 [2021-12-21 18:04:42,806 INFO L353 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-12-21 18:04:42,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 84 [2021-12-21 18:04:42,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:42,811 INFO L387 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 88 treesize of output 64 [2021-12-21 18:04:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:42,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-21 18:04:42,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 40 treesize of output 30 [2021-12-21 18:04:43,028 INFO L353 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-21 18:04:43,028 INFO L387 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 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-21 18:04:43,044 INFO L353 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-21 18:04:43,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-12-21 18:04:43,161 INFO L387 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 32 treesize of output 30 [2021-12-21 18:04:43,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 18:04:43,401 INFO L387 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 [2021-12-21 18:04:43,404 INFO L387 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 [2021-12-21 18:04:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:43,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:44,263 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_965 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_965) |c_create_sub_list_insert_sub_~head#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|)))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_964 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_965 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_965) |c_create_sub_list_insert_sub_~head#1.base|) .cse1) (_ bv4 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_964) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)))))) is different from false [2021-12-21 18:04:53,180 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:04:53,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21657207] [2021-12-21 18:04:53,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21657207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:04:53,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [348590049] [2021-12-21 18:04:53,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:53,181 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:04:53,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:04:53,182 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 18:04:53,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-12-21 18:04:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:54,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-21 18:04:54,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:54,300 INFO L387 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 [2021-12-21 18:04:54,331 INFO L387 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 [2021-12-21 18:04:54,340 INFO L387 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 [2021-12-21 18:04:54,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:54,355 INFO L387 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 21 treesize of output 20 [2021-12-21 18:04:54,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:54,364 INFO L387 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 21 treesize of output 20 [2021-12-21 18:04:54,380 INFO L387 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 [2021-12-21 18:04:54,420 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-21 18:04:54,421 INFO L387 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 18 treesize of output 25 [2021-12-21 18:04:54,486 INFO L387 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 16 treesize of output 18 [2021-12-21 18:04:54,508 INFO L387 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 16 treesize of output 18 [2021-12-21 18:04:54,527 INFO L387 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 7 treesize of output 3 [2021-12-21 18:04:54,532 INFO L387 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 7 treesize of output 3 [2021-12-21 18:04:58,194 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 91 [2021-12-21 18:04:58,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:58,203 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2021-12-21 18:04:58,207 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 43 [2021-12-21 18:04:58,229 INFO L353 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-12-21 18:04:58,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 84 [2021-12-21 18:04:58,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:58,235 INFO L387 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 88 treesize of output 64 [2021-12-21 18:04:58,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:58,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-21 18:04:58,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 40 treesize of output 22 [2021-12-21 18:04:58,417 INFO L353 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-21 18:04:58,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-12-21 18:04:58,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 18:04:58,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 18:04:58,479 INFO L387 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 32 treesize of output 30 [2021-12-21 18:04:58,513 INFO L387 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 [2021-12-21 18:04:58,519 INFO L387 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 [2021-12-21 18:04:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:58,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:58,786 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1104 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1105 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1104) |c_create_sub_list_insert_sub_~head#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1105) |c_create_sub_list_insert_sub_~head#1.base|) .cse0))))) (forall ((v_ArrVal_1104 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1104) |c_create_sub_list_insert_sub_~head#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|)))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))) is different from false [2021-12-21 18:05:08,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [348590049] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:08,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:05:08,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 28 [2021-12-21 18:05:08,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979991057] [2021-12-21 18:05:08,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:08,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-21 18:05:08,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:05:08,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-21 18:05:08,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1253, Unknown=52, NotChecked=146, Total=1560 [2021-12-21 18:05:08,829 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)