./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/list-properties/list_search-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-properties/list_search-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:43:12,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:43:12,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:43:12,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:43:12,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:43:12,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:43:12,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:43:12,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:43:12,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:43:12,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:43:12,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:43:12,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:43:12,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:43:12,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:43:12,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:43:12,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:43:12,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:43:12,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:43:12,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:43:12,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:43:12,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:43:12,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:43:12,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:43:12,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:43:12,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:43:12,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:43:12,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:43:12,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:43:12,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:43:12,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:43:12,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:43:12,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:43:12,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:43:12,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:43:12,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:43:12,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:43:12,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:43:12,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:43:12,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:43:12,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:43:12,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:43:12,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-12-16 05:43:12,762 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:43:12,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:43:12,763 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:43:12,763 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:43:12,764 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:43:12,764 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:43:12,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:43:12,765 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:43:12,765 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:43:12,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:43:12,765 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:43:12,765 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:43:12,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:43:12,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:43:12,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:43:12,766 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:43:12,766 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:43:12,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:43:12,767 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:43:12,767 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:43:12,767 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:43:12,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:43:12,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:43:12,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:43:12,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:43:12,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:43:12,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:43:12,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:43:12,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:43:12,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:43:12,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 [2021-12-16 05:43:12,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:43:12,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:43:12,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:43:12,992 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:43:12,993 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:43:12,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_search-2.i [2021-12-16 05:43:13,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8c6e53f1/0d0e888ea9d34c5eaa235de48992a46e/FLAG56a0a93c1 [2021-12-16 05:43:13,469 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:43:13,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i [2021-12-16 05:43:13,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8c6e53f1/0d0e888ea9d34c5eaa235de48992a46e/FLAG56a0a93c1 [2021-12-16 05:43:13,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8c6e53f1/0d0e888ea9d34c5eaa235de48992a46e [2021-12-16 05:43:13,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:43:13,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:43:13,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:43:13,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:43:13,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:43:13,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:43:13" (1/1) ... [2021-12-16 05:43:13,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51aa5e18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:13, skipping insertion in model container [2021-12-16 05:43:13,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:43:13" (1/1) ... [2021-12-16 05:43:13,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:43:13,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:43:14,163 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2021-12-16 05:43:14,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:43:14,364 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) [2021-12-16 05:43:14,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@758894db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:14, skipping insertion in model container [2021-12-16 05:43:14,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:43:14,367 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-16 05:43:14,369 INFO L158 Benchmark]: Toolchain (without parser) took 531.98ms. Allocated memory is still 117.4MB. Free memory was 80.4MB in the beginning and 88.7MB in the end (delta: -8.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 05:43:14,370 INFO L158 Benchmark]: CDTParser took 0.70ms. Allocated memory is still 117.4MB. Free memory is still 98.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 05:43:14,370 INFO L158 Benchmark]: CACSL2BoogieTranslator took 529.65ms. Allocated memory is still 117.4MB. Free memory was 80.2MB in the beginning and 88.7MB in the end (delta: -8.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 05:43:14,372 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70ms. Allocated memory is still 117.4MB. Free memory is still 98.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 529.65ms. Allocated memory is still 117.4MB. Free memory was 80.2MB in the beginning and 88.7MB in the end (delta: -8.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 792]: Unsupported Syntax Found a cast between two array/pointer types 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/list-properties/list_search-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:43:16,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:43:16,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:43:16,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:43:16,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:43:16,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:43:16,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:43:16,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:43:16,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:43:16,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:43:16,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:43:16,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:43:16,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:43:16,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:43:16,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:43:16,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:43:16,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:43:16,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:43:16,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:43:16,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:43:16,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:43:16,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:43:16,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:43:16,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:43:16,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:43:16,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:43:16,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:43:16,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:43:16,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:43:16,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:43:16,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:43:16,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:43:16,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:43:16,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:43:16,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:43:16,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:43:16,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:43:16,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:43:16,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:43:16,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:43:16,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:43:16,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-12-16 05:43:16,301 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:43:16,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:43:16,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:43:16,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:43:16,303 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:43:16,303 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:43:16,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:43:16,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:43:16,305 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:43:16,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:43:16,306 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:43:16,306 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:43:16,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:43:16,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:43:16,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:43:16,306 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:43:16,307 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:43:16,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:43:16,307 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:43:16,307 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 05:43:16,307 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 05:43:16,307 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:43:16,308 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:43:16,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:43:16,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:43:16,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:43:16,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:43:16,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:43:16,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:43:16,309 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 05:43:16,309 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 05:43:16,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:43:16,309 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 05:43:16,309 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 [2021-12-16 05:43:16,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:43:16,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:43:16,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:43:16,588 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:43:16,589 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:43:16,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_search-2.i [2021-12-16 05:43:16,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46ea7f407/06f117a073f94315ac7081169b7c7f5a/FLAGb13e428f6 [2021-12-16 05:43:17,222 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:43:17,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i [2021-12-16 05:43:17,242 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46ea7f407/06f117a073f94315ac7081169b7c7f5a/FLAGb13e428f6 [2021-12-16 05:43:17,634 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46ea7f407/06f117a073f94315ac7081169b7c7f5a [2021-12-16 05:43:17,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:43:17,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:43:17,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:43:17,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:43:17,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:43:17,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:43:17" (1/1) ... [2021-12-16 05:43:17,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54f3c5cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:17, skipping insertion in model container [2021-12-16 05:43:17,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:43:17" (1/1) ... [2021-12-16 05:43:17,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:43:17,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:43:17,858 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2021-12-16 05:43:18,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:43:18,032 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-16 05:43:18,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:43:18,042 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2021-12-16 05:43:18,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:43:18,075 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:43:18,082 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2021-12-16 05:43:18,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:43:18,174 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:43:18,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:18 WrapperNode [2021-12-16 05:43:18,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:43:18,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:43:18,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:43:18,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:43:18,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:18" (1/1) ... [2021-12-16 05:43:18,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:18" (1/1) ... [2021-12-16 05:43:18,235 INFO L137 Inliner]: procedures = 229, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2021-12-16 05:43:18,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:43:18,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:43:18,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:43:18,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:43:18,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:18" (1/1) ... [2021-12-16 05:43:18,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:18" (1/1) ... [2021-12-16 05:43:18,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:18" (1/1) ... [2021-12-16 05:43:18,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:18" (1/1) ... [2021-12-16 05:43:18,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:18" (1/1) ... [2021-12-16 05:43:18,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:18" (1/1) ... [2021-12-16 05:43:18,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:18" (1/1) ... [2021-12-16 05:43:18,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:43:18,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:43:18,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:43:18,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:43:18,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:18" (1/1) ... [2021-12-16 05:43:18,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:43:18,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:43:18,313 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) [2021-12-16 05:43:18,316 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 [2021-12-16 05:43:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 05:43:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 05:43:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 05:43:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:43:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 05:43:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 05:43:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 05:43:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 05:43:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2021-12-16 05:43:18,353 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2021-12-16 05:43:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:43:18,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:43:18,486 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:43:18,487 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:43:18,780 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:43:18,785 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:43:18,785 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 05:43:18,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:43:18 BoogieIcfgContainer [2021-12-16 05:43:18,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:43:18,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:43:18,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:43:18,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:43:18,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:43:17" (1/3) ... [2021-12-16 05:43:18,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d0605d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:43:18, skipping insertion in model container [2021-12-16 05:43:18,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:43:18" (2/3) ... [2021-12-16 05:43:18,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d0605d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:43:18, skipping insertion in model container [2021-12-16 05:43:18,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:43:18" (3/3) ... [2021-12-16 05:43:18,792 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-2.i [2021-12-16 05:43:18,795 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:43:18,795 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2021-12-16 05:43:18,819 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:43:18,825 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 [2021-12-16 05:43:18,826 INFO L340 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2021-12-16 05:43:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 85 states have internal predecessors, (97), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:43:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 05:43:18,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:18,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 05:43:18,841 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting insert_listErr0REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:18,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:18,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1514693702, now seen corresponding path program 1 times [2021-12-16 05:43:18,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:18,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552550113] [2021-12-16 05:43:18,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:18,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:18,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:18,854 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) [2021-12-16 05:43:18,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 05:43:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:18,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 05:43:18,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:18,975 INFO L388 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 [2021-12-16 05:43:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:18,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:18,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:18,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552550113] [2021-12-16 05:43:18,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552550113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:18,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:18,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:43:18,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382131609] [2021-12-16 05:43:18,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:18,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:43:18,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:19,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:43:19,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:19,024 INFO L87 Difference]: Start difference. First operand has 91 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 85 states have internal predecessors, (97), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:19,150 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2021-12-16 05:43:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:43:19,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 05:43:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:19,156 INFO L225 Difference]: With dead ends: 87 [2021-12-16 05:43:19,157 INFO L226 Difference]: Without dead ends: 85 [2021-12-16 05:43:19,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:19,161 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 11 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:19,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 140 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:43:19,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-16 05:43:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-12-16 05:43:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 79 states have internal predecessors, (86), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:43:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2021-12-16 05:43:19,194 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 6 [2021-12-16 05:43:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:19,194 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2021-12-16 05:43:19,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:19,195 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2021-12-16 05:43:19,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 05:43:19,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:19,196 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 05:43:19,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-16 05:43:19,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:19,402 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting insert_listErr1REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:19,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:19,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1514693703, now seen corresponding path program 1 times [2021-12-16 05:43:19,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:19,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859041136] [2021-12-16 05:43:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:19,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:19,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:19,414 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) [2021-12-16 05:43:19,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 05:43:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:19,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:43:19,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:19,502 INFO L388 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 [2021-12-16 05:43:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:19,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:19,519 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:19,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859041136] [2021-12-16 05:43:19,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859041136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:19,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:19,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:43:19,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847790221] [2021-12-16 05:43:19,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:19,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:43:19,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:19,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:43:19,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:19,522 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:19,620 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-12-16 05:43:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:43:19,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 05:43:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:19,622 INFO L225 Difference]: With dead ends: 81 [2021-12-16 05:43:19,622 INFO L226 Difference]: Without dead ends: 81 [2021-12-16 05:43:19,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:43:19,624 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 7 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:19,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 141 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:43:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-16 05:43:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-12-16 05:43:19,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.607843137254902) internal successors, (82), 75 states have internal predecessors, (82), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:43:19,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2021-12-16 05:43:19,632 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 6 [2021-12-16 05:43:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:19,632 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2021-12-16 05:43:19,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:43:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2021-12-16 05:43:19,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-16 05:43:19,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:19,634 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:19,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:19,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:19,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:19,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:19,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1345131113, now seen corresponding path program 1 times [2021-12-16 05:43:19,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:19,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312492239] [2021-12-16 05:43:19,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:19,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:19,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:19,847 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) [2021-12-16 05:43:19,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 05:43:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:20,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 05:43:20,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 05:43:20,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 05:43:20,286 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:20,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312492239] [2021-12-16 05:43:20,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312492239] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:43:20,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:43:20,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-12-16 05:43:20,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617921137] [2021-12-16 05:43:20,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:20,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:43:20,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:20,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:43:20,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:43:20,288 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 05:43:20,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:20,478 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-12-16 05:43:20,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:43:20,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-12-16 05:43:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:20,481 INFO L225 Difference]: With dead ends: 111 [2021-12-16 05:43:20,481 INFO L226 Difference]: Without dead ends: 111 [2021-12-16 05:43:20,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:43:20,482 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 90 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:20,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 339 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:43:20,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-16 05:43:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2021-12-16 05:43:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 79 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-16 05:43:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-12-16 05:43:20,489 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 40 [2021-12-16 05:43:20,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:20,489 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-12-16 05:43:20,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 05:43:20,489 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-12-16 05:43:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-16 05:43:20,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:20,490 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:20,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:20,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:20,691 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:20,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:20,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1982971279, now seen corresponding path program 1 times [2021-12-16 05:43:20,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:20,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936125242] [2021-12-16 05:43:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:20,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:20,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:20,694 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) [2021-12-16 05:43:20,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 05:43:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:20,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 05:43:20,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:20,955 INFO L388 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 [2021-12-16 05:43:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 05:43:20,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:20,993 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:20,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936125242] [2021-12-16 05:43:20,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936125242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:20,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:20,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:43:20,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266122193] [2021-12-16 05:43:20,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:20,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:43:20,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:20,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:43:20,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:43:20,996 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 05:43:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:21,215 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2021-12-16 05:43:21,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:43:21,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-12-16 05:43:21,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:21,218 INFO L225 Difference]: With dead ends: 166 [2021-12-16 05:43:21,218 INFO L226 Difference]: Without dead ends: 166 [2021-12-16 05:43:21,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:43:21,220 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 191 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:21,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 149 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:43:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-16 05:43:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 88. [2021-12-16 05:43:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 57 states have (on average 1.5789473684210527) internal successors, (90), 81 states have internal predecessors, (90), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-16 05:43:21,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2021-12-16 05:43:21,227 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 40 [2021-12-16 05:43:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:21,227 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2021-12-16 05:43:21,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 05:43:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2021-12-16 05:43:21,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-16 05:43:21,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:21,237 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:21,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:21,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:21,446 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:21,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:21,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1982971278, now seen corresponding path program 1 times [2021-12-16 05:43:21,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:21,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497063367] [2021-12-16 05:43:21,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:21,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:21,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:21,449 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) [2021-12-16 05:43:21,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 05:43:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:21,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:43:21,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:21,663 INFO L388 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 [2021-12-16 05:43:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 05:43:21,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:21,749 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:21,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497063367] [2021-12-16 05:43:21,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497063367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:21,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:21,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:43:21,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746614791] [2021-12-16 05:43:21,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:21,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:43:21,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:21,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:43:21,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:43:21,751 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 05:43:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:22,013 INFO L93 Difference]: Finished difference Result 184 states and 198 transitions. [2021-12-16 05:43:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:43:22,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-12-16 05:43:22,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:22,015 INFO L225 Difference]: With dead ends: 184 [2021-12-16 05:43:22,015 INFO L226 Difference]: Without dead ends: 184 [2021-12-16 05:43:22,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:43:22,016 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 216 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:22,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 157 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:43:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-16 05:43:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 97. [2021-12-16 05:43:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 66 states have (on average 1.621212121212121) internal successors, (107), 90 states have internal predecessors, (107), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-16 05:43:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2021-12-16 05:43:22,021 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 40 [2021-12-16 05:43:22,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:22,021 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2021-12-16 05:43:22,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 05:43:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2021-12-16 05:43:22,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 05:43:22,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:22,022 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:22,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:22,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:22,231 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:22,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1718799074, now seen corresponding path program 1 times [2021-12-16 05:43:22,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:22,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218517117] [2021-12-16 05:43:22,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:22,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:22,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:22,234 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) [2021-12-16 05:43:22,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-16 05:43:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:22,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:43:22,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 05:43:22,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:22,445 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:22,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218517117] [2021-12-16 05:43:22,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218517117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:22,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:22,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:43:22,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783480245] [2021-12-16 05:43:22,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:22,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:43:22,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:22,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:43:22,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:43:22,447 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 05:43:22,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:22,549 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2021-12-16 05:43:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:43:22,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-12-16 05:43:22,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:22,550 INFO L225 Difference]: With dead ends: 118 [2021-12-16 05:43:22,550 INFO L226 Difference]: Without dead ends: 118 [2021-12-16 05:43:22,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:43:22,551 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 94 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:22,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 246 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:43:22,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-16 05:43:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2021-12-16 05:43:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 90 states have internal predecessors, (105), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-16 05:43:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2021-12-16 05:43:22,556 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 43 [2021-12-16 05:43:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:22,556 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2021-12-16 05:43:22,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 05:43:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2021-12-16 05:43:22,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 05:43:22,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:22,557 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:22,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-16 05:43:22,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:22,765 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:22,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:22,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1717169730, now seen corresponding path program 1 times [2021-12-16 05:43:22,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:22,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455650795] [2021-12-16 05:43:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:22,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:22,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:22,767 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) [2021-12-16 05:43:22,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-16 05:43:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:22,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 05:43:22,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:23,031 INFO L388 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 [2021-12-16 05:43:23,168 INFO L388 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 [2021-12-16 05:43:23,285 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-12-16 05:43:23,286 INFO L388 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 19 treesize of output 24 [2021-12-16 05:43:23,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-16 05:43:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 05:43:23,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 05:43:23,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:23,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455650795] [2021-12-16 05:43:23,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455650795] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:43:23,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:43:23,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-12-16 05:43:23,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755096894] [2021-12-16 05:43:23,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:23,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 05:43:23,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:23,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 05:43:23,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-12-16 05:43:23,888 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 05:43:24,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:24,520 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2021-12-16 05:43:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 05:43:24,522 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2021-12-16 05:43:24,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:24,523 INFO L225 Difference]: With dead ends: 171 [2021-12-16 05:43:24,523 INFO L226 Difference]: Without dead ends: 171 [2021-12-16 05:43:24,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-12-16 05:43:24,524 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 483 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:24,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 401 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 369 Invalid, 0 Unknown, 78 Unchecked, 0.5s Time] [2021-12-16 05:43:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-16 05:43:24,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 100. [2021-12-16 05:43:24,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.5942028985507246) internal successors, (110), 93 states have internal predecessors, (110), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-16 05:43:24,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2021-12-16 05:43:24,528 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 43 [2021-12-16 05:43:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:24,528 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2021-12-16 05:43:24,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 05:43:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2021-12-16 05:43:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 05:43:24,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:24,529 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:24,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:24,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:24,745 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:24,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:24,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1717169729, now seen corresponding path program 1 times [2021-12-16 05:43:24,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:24,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541025848] [2021-12-16 05:43:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:24,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:24,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:24,748 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) [2021-12-16 05:43:24,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-16 05:43:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:24,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 05:43:24,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:25,016 INFO L388 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 [2021-12-16 05:43:25,179 INFO L388 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 [2021-12-16 05:43:25,184 INFO L388 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 [2021-12-16 05:43:25,264 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 05:43:25,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-12-16 05:43:25,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-16 05:43:25,334 INFO L388 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 [2021-12-16 05:43:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 05:43:25,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:25,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:25,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541025848] [2021-12-16 05:43:25,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541025848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:25,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [754157274] [2021-12-16 05:43:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:25,914 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 05:43:25,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 05:43:25,933 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 05:43:25,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-12-16 05:43:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:26,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 05:43:26,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:26,407 INFO L388 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 [2021-12-16 05:43:26,411 INFO L388 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 [2021-12-16 05:43:26,684 INFO L388 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 [2021-12-16 05:43:26,694 INFO L388 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 [2021-12-16 05:43:26,881 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-16 05:43:26,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-16 05:43:26,897 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-16 05:43:26,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-16 05:43:27,011 INFO L388 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 [2021-12-16 05:43:27,015 INFO L388 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 [2021-12-16 05:43:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 05:43:27,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:27,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [754157274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:27,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:43:27,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-12-16 05:43:27,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654322641] [2021-12-16 05:43:27,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:27,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 05:43:27,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:27,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 05:43:27,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-12-16 05:43:27,393 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 05:43:28,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:28,556 INFO L93 Difference]: Finished difference Result 189 states and 205 transitions. [2021-12-16 05:43:28,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 05:43:28,556 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2021-12-16 05:43:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:28,557 INFO L225 Difference]: With dead ends: 189 [2021-12-16 05:43:28,557 INFO L226 Difference]: Without dead ends: 189 [2021-12-16 05:43:28,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=214, Invalid=1268, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 05:43:28,558 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 401 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:28,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 501 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 527 Invalid, 0 Unknown, 202 Unchecked, 0.6s Time] [2021-12-16 05:43:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-16 05:43:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 100. [2021-12-16 05:43:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.5797101449275361) internal successors, (109), 93 states have internal predecessors, (109), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-16 05:43:28,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2021-12-16 05:43:28,568 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 43 [2021-12-16 05:43:28,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:28,568 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2021-12-16 05:43:28,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 05:43:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2021-12-16 05:43:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-16 05:43:28,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:28,570 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:28,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:28,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:28,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-16 05:43:28,980 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:28,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:28,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1150420657, now seen corresponding path program 1 times [2021-12-16 05:43:28,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:28,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965938911] [2021-12-16 05:43:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:28,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:28,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:28,984 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) [2021-12-16 05:43:28,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-16 05:43:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:29,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 05:43:29,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:29,298 INFO L388 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 [2021-12-16 05:43:29,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-16 05:43:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 05:43:29,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 05:43:29,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:29,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965938911] [2021-12-16 05:43:29,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965938911] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:43:29,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:43:29,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-12-16 05:43:29,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160424634] [2021-12-16 05:43:29,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:29,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 05:43:29,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:29,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 05:43:29,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-16 05:43:29,674 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 05:43:30,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:30,486 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-12-16 05:43:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 05:43:30,487 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2021-12-16 05:43:30,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:30,488 INFO L225 Difference]: With dead ends: 128 [2021-12-16 05:43:30,488 INFO L226 Difference]: Without dead ends: 128 [2021-12-16 05:43:30,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 05:43:30,489 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 164 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:30,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 728 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 05:43:30,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-16 05:43:30,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2021-12-16 05:43:30,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.5492957746478873) internal successors, (110), 95 states have internal predecessors, (110), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:43:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2021-12-16 05:43:30,492 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 46 [2021-12-16 05:43:30,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:30,492 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2021-12-16 05:43:30,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 05:43:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2021-12-16 05:43:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-16 05:43:30,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:30,493 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:30,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:30,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:30,693 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:30,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1152050001, now seen corresponding path program 2 times [2021-12-16 05:43:30,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:30,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287668986] [2021-12-16 05:43:30,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:43:30,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:30,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:30,695 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) [2021-12-16 05:43:30,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-16 05:43:30,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:43:30,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:43:30,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-16 05:43:30,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:31,000 INFO L388 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 [2021-12-16 05:43:31,069 INFO L388 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 [2021-12-16 05:43:31,151 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 05:43:31,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-16 05:43:31,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:31,288 INFO L388 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 [2021-12-16 05:43:31,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:31,394 INFO L388 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 34 treesize of output 32 [2021-12-16 05:43:31,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:31,407 INFO L354 Elim1Store]: treesize reduction 39, result has 42.6 percent of original size [2021-12-16 05:43:31,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 59 [2021-12-16 05:43:31,540 INFO L388 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 [2021-12-16 05:43:31,679 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:43:31,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 37 [2021-12-16 05:43:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:43:31,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:32,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:32,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-12-16 05:43:32,250 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_2 (Array (_ BitVec 32) (_ BitVec 32))) (v_~head~0.base_94 (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (select (store |c_#valid| v_~head~0.base_94 (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_94 v_arrayElimArr_2) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32)))) (_ bv1 1))) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_94))) (not (= (select v_arrayElimArr_2 (_ bv4 32)) c_~head~0.base)))) is different from false [2021-12-16 05:43:32,251 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:32,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287668986] [2021-12-16 05:43:32,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287668986] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:32,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1410926193] [2021-12-16 05:43:32,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:43:32,252 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 05:43:32,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 05:43:32,253 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 05:43:32,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-12-16 05:43:32,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:43:32,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:43:32,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-16 05:43:32,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:32,568 INFO L388 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 [2021-12-16 05:43:32,642 INFO L388 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 [2021-12-16 05:43:32,692 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 05:43:32,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-16 05:43:32,847 INFO L388 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 [2021-12-16 05:43:32,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:32,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:32,921 INFO L388 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 34 treesize of output 32 [2021-12-16 05:43:32,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:32,935 INFO L354 Elim1Store]: treesize reduction 39, result has 42.6 percent of original size [2021-12-16 05:43:32,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 59 [2021-12-16 05:43:33,006 INFO L388 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 [2021-12-16 05:43:33,095 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:43:33,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 37 [2021-12-16 05:43:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:43:33,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:33,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:33,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-12-16 05:43:33,424 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_100 (_ BitVec 32)) (v_arrayElimArr_4 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 1) (bvadd (select (store |c_#valid| v_~head~0.base_100 (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_100 v_arrayElimArr_4) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32)))) (_ bv1 1))) (not (= (select v_arrayElimArr_4 (_ bv4 32)) c_~head~0.base)) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_100))))) is different from false [2021-12-16 05:43:33,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1410926193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:33,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:43:33,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-12-16 05:43:33,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097360208] [2021-12-16 05:43:33,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:33,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 05:43:33,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:33,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 05:43:33,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=625, Unknown=3, NotChecked=102, Total=812 [2021-12-16 05:43:33,427 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 05:43:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:34,049 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2021-12-16 05:43:34,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 05:43:34,049 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2021-12-16 05:43:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:34,050 INFO L225 Difference]: With dead ends: 111 [2021-12-16 05:43:34,050 INFO L226 Difference]: Without dead ends: 111 [2021-12-16 05:43:34,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=155, Invalid=1104, Unknown=9, NotChecked=138, Total=1406 [2021-12-16 05:43:34,051 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 16 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:34,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 545 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 196 Invalid, 0 Unknown, 287 Unchecked, 0.2s Time] [2021-12-16 05:43:34,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-16 05:43:34,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2021-12-16 05:43:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 74 states have (on average 1.554054054054054) internal successors, (115), 98 states have internal predecessors, (115), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:43:34,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2021-12-16 05:43:34,054 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 46 [2021-12-16 05:43:34,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:34,054 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2021-12-16 05:43:34,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 05:43:34,054 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2021-12-16 05:43:34,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-16 05:43:34,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:34,055 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:34,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:34,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:34,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:34,463 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:34,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:34,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1152050002, now seen corresponding path program 2 times [2021-12-16 05:43:34,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:34,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123410359] [2021-12-16 05:43:34,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:43:34,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:34,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:34,465 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) [2021-12-16 05:43:34,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-16 05:43:34,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:43:34,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:43:34,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-16 05:43:34,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:34,837 INFO L388 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 [2021-12-16 05:43:34,842 INFO L388 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 [2021-12-16 05:43:35,116 INFO L388 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 [2021-12-16 05:43:35,120 INFO L388 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 [2021-12-16 05:43:35,241 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-16 05:43:35,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-16 05:43:35,260 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 05:43:35,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-16 05:43:35,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:35,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:35,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:35,729 INFO L388 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 45 treesize of output 39 [2021-12-16 05:43:35,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:35,737 INFO L388 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 18 treesize of output 20 [2021-12-16 05:43:35,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:35,748 INFO L354 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2021-12-16 05:43:35,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 29 [2021-12-16 05:43:35,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-16 05:43:36,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:36,135 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 05:43:36,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 47 [2021-12-16 05:43:36,146 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:43:36,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-16 05:43:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:43:36,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:37,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:37,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 70 [2021-12-16 05:43:37,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:37,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2021-12-16 05:43:37,193 INFO L388 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 6 treesize of output 4 [2021-12-16 05:43:37,269 INFO L388 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 6 treesize of output 4 [2021-12-16 05:43:37,354 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_7 (Array (_ BitVec 32) (_ BitVec 32))) (v_~head~0.base_106 (_ BitVec 32)) (v_arrayElimArr_8 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_106))) (let ((.cse1 (bvadd c_~head~0.offset (_ bv4 32)))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_106 v_arrayElimArr_8) c_~head~0.base) .cse1))) (let ((.cse0 (bvadd .cse2 (_ bv8 32)))) (and (bvule .cse0 (select (store |c_#length| v_~head~0.base_106 (_ bv8 32)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_106 v_arrayElimArr_7) c_~head~0.base) .cse1))) (bvule (bvadd .cse2 (_ bv4 32)) .cse0))))) (not (= (select v_arrayElimArr_8 (_ bv4 32)) c_~head~0.offset)) (not (= (select v_arrayElimArr_7 (_ bv4 32)) c_~head~0.base)))) is different from false [2021-12-16 05:43:37,358 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:37,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123410359] [2021-12-16 05:43:37,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123410359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:37,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [772592755] [2021-12-16 05:43:37,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:43:37,359 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 05:43:37,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 05:43:37,360 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 05:43:37,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-12-16 05:43:37,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:43:37,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:43:37,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-16 05:43:37,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:37,752 INFO L388 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 [2021-12-16 05:43:37,758 INFO L388 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 [2021-12-16 05:43:37,906 INFO L388 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 [2021-12-16 05:43:37,912 INFO L388 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 [2021-12-16 05:43:38,000 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-16 05:43:38,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-16 05:43:38,021 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 05:43:38,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-16 05:43:38,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:38,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:38,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:38,292 INFO L388 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 45 treesize of output 39 [2021-12-16 05:43:38,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:38,301 INFO L388 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 18 treesize of output 20 [2021-12-16 05:43:38,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:38,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-16 05:43:38,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:38,321 INFO L354 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2021-12-16 05:43:38,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 29 [2021-12-16 05:43:38,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:38,728 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 05:43:38,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 47 [2021-12-16 05:43:38,739 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:43:38,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-16 05:43:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:43:38,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:39,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:39,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 70 [2021-12-16 05:43:39,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:39,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2021-12-16 05:43:39,184 INFO L388 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 6 treesize of output 4 [2021-12-16 05:43:39,289 INFO L388 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 6 treesize of output 4 [2021-12-16 05:43:39,401 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_112 (_ BitVec 32)) (v_arrayElimArr_11 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_12 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_11 (_ bv4 32)) c_~head~0.base)) (not (= (select v_arrayElimArr_12 (_ bv4 32)) c_~head~0.offset)) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_112))) (let ((.cse1 (bvadd c_~head~0.offset (_ bv4 32)))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_112 v_arrayElimArr_12) c_~head~0.base) .cse1))) (let ((.cse0 (bvadd .cse2 (_ bv8 32)))) (and (bvule .cse0 (select (store |c_#length| v_~head~0.base_112 (_ bv8 32)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_112 v_arrayElimArr_11) c_~head~0.base) .cse1))) (bvule (bvadd .cse2 (_ bv4 32)) .cse0))))))) is different from false [2021-12-16 05:43:39,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [772592755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:39,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:43:39,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-12-16 05:43:39,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314397575] [2021-12-16 05:43:39,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:39,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 05:43:39,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:39,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 05:43:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=591, Unknown=5, NotChecked=98, Total=756 [2021-12-16 05:43:39,406 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 05:43:40,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:40,726 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2021-12-16 05:43:40,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 05:43:40,726 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2021-12-16 05:43:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:40,728 INFO L225 Difference]: With dead ends: 113 [2021-12-16 05:43:40,728 INFO L226 Difference]: Without dead ends: 113 [2021-12-16 05:43:40,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=125, Invalid=1128, Unknown=15, NotChecked=138, Total=1406 [2021-12-16 05:43:40,734 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 7 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 461 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:40,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 818 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 349 Invalid, 0 Unknown, 461 Unchecked, 0.3s Time] [2021-12-16 05:43:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-16 05:43:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2021-12-16 05:43:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 74 states have (on average 1.5405405405405406) internal successors, (114), 98 states have internal predecessors, (114), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:43:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2021-12-16 05:43:40,749 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 46 [2021-12-16 05:43:40,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:40,749 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2021-12-16 05:43:40,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 05:43:40,749 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2021-12-16 05:43:40,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 05:43:40,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:40,753 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:40,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-12-16 05:43:40,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:41,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:41,155 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:41,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:41,156 INFO L85 PathProgramCache]: Analyzing trace with hash -363698114, now seen corresponding path program 2 times [2021-12-16 05:43:41,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:41,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118175508] [2021-12-16 05:43:41,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:43:41,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:41,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:41,157 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:43:41,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-16 05:43:41,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 05:43:41,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:43:41,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:43:41,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-16 05:43:41,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:41,339 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:41,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118175508] [2021-12-16 05:43:41,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118175508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:41,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:41,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:43:41,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626739162] [2021-12-16 05:43:41,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:41,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:43:41,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:41,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:43:41,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:43:41,341 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 05:43:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:41,564 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2021-12-16 05:43:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:43:41,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2021-12-16 05:43:41,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:41,568 INFO L225 Difference]: With dead ends: 168 [2021-12-16 05:43:41,568 INFO L226 Difference]: Without dead ends: 168 [2021-12-16 05:43:41,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:43:41,569 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 170 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:41,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 150 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:43:41,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-16 05:43:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 110. [2021-12-16 05:43:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 79 states have (on average 1.5569620253164558) internal successors, (123), 103 states have internal predecessors, (123), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:43:41,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2021-12-16 05:43:41,572 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 49 [2021-12-16 05:43:41,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:41,573 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2021-12-16 05:43:41,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 05:43:41,573 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2021-12-16 05:43:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 05:43:41,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:41,573 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:41,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:41,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:41,782 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:41,783 INFO L85 PathProgramCache]: Analyzing trace with hash -363698113, now seen corresponding path program 1 times [2021-12-16 05:43:41,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:41,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645300767] [2021-12-16 05:43:41,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:43:41,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:41,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:41,785 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) [2021-12-16 05:43:41,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-16 05:43:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:43:42,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:43:42,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:42,069 INFO L388 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 [2021-12-16 05:43:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 05:43:42,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:43:42,161 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:42,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645300767] [2021-12-16 05:43:42,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645300767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:43:42,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:43:42,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:43:42,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974808439] [2021-12-16 05:43:42,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:43:42,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:43:42,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:42,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:43:42,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:43:42,162 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 05:43:42,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:42,477 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2021-12-16 05:43:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:43:42,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2021-12-16 05:43:42,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:42,479 INFO L225 Difference]: With dead ends: 198 [2021-12-16 05:43:42,479 INFO L226 Difference]: Without dead ends: 198 [2021-12-16 05:43:42,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:43:42,480 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 202 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:42,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 173 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:43:42,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-16 05:43:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 113. [2021-12-16 05:43:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 82 states have (on average 1.5365853658536586) internal successors, (126), 106 states have internal predecessors, (126), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:43:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 134 transitions. [2021-12-16 05:43:42,483 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 134 transitions. Word has length 49 [2021-12-16 05:43:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:42,484 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 134 transitions. [2021-12-16 05:43:42,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 05:43:42,484 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 134 transitions. [2021-12-16 05:43:42,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 05:43:42,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:42,487 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:42,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:42,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:43:42,691 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:42,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:42,692 INFO L85 PathProgramCache]: Analyzing trace with hash -362068770, now seen corresponding path program 3 times [2021-12-16 05:43:42,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:42,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669124245] [2021-12-16 05:43:42,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:43:42,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:42,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:42,693 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) [2021-12-16 05:43:42,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-16 05:43:43,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 05:43:43,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:43:43,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-16 05:43:43,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:43,080 INFO L388 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 [2021-12-16 05:43:43,162 INFO L388 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 [2021-12-16 05:43:43,242 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 05:43:43,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-16 05:43:43,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:43,407 INFO L388 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 [2021-12-16 05:43:43,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:43,532 INFO L388 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 34 treesize of output 32 [2021-12-16 05:43:43,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:43,548 INFO L354 Elim1Store]: treesize reduction 39, result has 42.6 percent of original size [2021-12-16 05:43:43,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 59 [2021-12-16 05:43:43,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:43,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:44,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:44,155 INFO L354 Elim1Store]: treesize reduction 99, result has 42.4 percent of original size [2021-12-16 05:43:44,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 100 [2021-12-16 05:43:44,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 [2021-12-16 05:43:44,189 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-12-16 05:43:44,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 75 [2021-12-16 05:43:44,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:44,848 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:43:44,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 31 [2021-12-16 05:43:45,171 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-16 05:43:45,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 62 [2021-12-16 05:43:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:45,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:46,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:46,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2021-12-16 05:43:46,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:46,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2021-12-16 05:43:46,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:46,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669124245] [2021-12-16 05:43:46,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669124245] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:46,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1723440167] [2021-12-16 05:43:46,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:43:46,662 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 05:43:46,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 05:43:46,663 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) [2021-12-16 05:43:46,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-12-16 05:43:47,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 05:43:47,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:43:47,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-16 05:43:47,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:47,189 INFO L388 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 [2021-12-16 05:43:47,257 INFO L388 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 [2021-12-16 05:43:47,303 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 05:43:47,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-16 05:43:47,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:47,500 INFO L388 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 [2021-12-16 05:43:47,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:47,625 INFO L388 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 34 treesize of output 32 [2021-12-16 05:43:47,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:47,648 INFO L354 Elim1Store]: treesize reduction 39, result has 42.6 percent of original size [2021-12-16 05:43:47,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 59 [2021-12-16 05:43:47,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:47,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:48,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:48,029 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-12-16 05:43:48,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 61 [2021-12-16 05:43:48,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:48,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:48,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:48,073 INFO L354 Elim1Store]: treesize reduction 51, result has 42.0 percent of original size [2021-12-16 05:43:48,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 86 [2021-12-16 05:43:48,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:48,083 INFO L388 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 18 treesize of output 20 [2021-12-16 05:43:48,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:48,480 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:43:48,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 31 [2021-12-16 05:43:48,693 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-16 05:43:48,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 62 [2021-12-16 05:43:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:43:48,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:49,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:49,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2021-12-16 05:43:49,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:49,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2021-12-16 05:43:49,598 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_124 (_ BitVec 32)) (v_arrayElimArr_21 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_22 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_124))) (= (_ bv0 1) (bvadd (select (store |c_#valid| v_~head~0.base_124 (_ bv1 1)) (let ((.cse1 (bvadd c_~head~0.offset (_ bv4 32)))) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| v_~head~0.base_124 v_arrayElimArr_21))) (select .cse0 (select (select .cse0 c_~head~0.base) .cse1))) (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_124 v_arrayElimArr_22) c_~head~0.base) .cse1) (_ bv4 32))))) (_ bv1 1))) (not (= (select v_arrayElimArr_21 (_ bv4 32)) c_~head~0.base)) (not (= (select v_arrayElimArr_22 (_ bv4 32)) c_~head~0.offset)))) is different from false [2021-12-16 05:43:49,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1723440167] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:49,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:43:49,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-12-16 05:43:49,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37017981] [2021-12-16 05:43:49,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:43:49,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 05:43:49,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:43:49,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 05:43:49,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1643, Unknown=17, NotChecked=82, Total=1892 [2021-12-16 05:43:49,603 INFO L87 Difference]: Start difference. First operand 113 states and 134 transitions. Second operand has 30 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 26 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:43:50,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:43:50,408 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2021-12-16 05:43:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 05:43:50,408 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 26 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2021-12-16 05:43:50,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:43:50,414 INFO L225 Difference]: With dead ends: 124 [2021-12-16 05:43:50,415 INFO L226 Difference]: Without dead ends: 124 [2021-12-16 05:43:50,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 72 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=257, Invalid=2370, Unknown=29, NotChecked=100, Total=2756 [2021-12-16 05:43:50,416 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 17 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:43:50,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 556 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 98 Invalid, 0 Unknown, 306 Unchecked, 0.1s Time] [2021-12-16 05:43:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-16 05:43:50,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2021-12-16 05:43:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 109 states have internal predecessors, (131), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:43:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 139 transitions. [2021-12-16 05:43:50,427 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 139 transitions. Word has length 49 [2021-12-16 05:43:50,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:43:50,427 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 139 transitions. [2021-12-16 05:43:50,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 26 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:43:50,427 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 139 transitions. [2021-12-16 05:43:50,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 05:43:50,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:43:50,428 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:43:50,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-12-16 05:43:50,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-16 05:43:50,834 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 [2021-12-16 05:43:50,834 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:43:50,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:43:50,834 INFO L85 PathProgramCache]: Analyzing trace with hash -362068769, now seen corresponding path program 3 times [2021-12-16 05:43:50,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:43:50,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791056311] [2021-12-16 05:43:50,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:43:50,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:43:50,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:43:50,836 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) [2021-12-16 05:43:50,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-16 05:43:51,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 05:43:51,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:43:51,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-16 05:43:51,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:51,322 INFO L388 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 [2021-12-16 05:43:51,326 INFO L388 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 [2021-12-16 05:43:51,543 INFO L388 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 [2021-12-16 05:43:51,551 INFO L388 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 [2021-12-16 05:43:51,719 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 05:43:51,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-16 05:43:51,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-16 05:43:51,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:51,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:52,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:52,215 INFO L388 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 [2021-12-16 05:43:52,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:52,222 INFO L388 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 45 treesize of output 39 [2021-12-16 05:43:52,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:52,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-16 05:43:52,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:52,242 INFO L354 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2021-12-16 05:43:52,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 29 [2021-12-16 05:43:52,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:52,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:52,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:52,832 INFO L354 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2021-12-16 05:43:52,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 59 [2021-12-16 05:43:52,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:52,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:52,867 INFO L354 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2021-12-16 05:43:52,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 50 [2021-12-16 05:43:52,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:52,887 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-16 05:43:52,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2021-12-16 05:43:52,904 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-16 05:43:52,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-16 05:43:52,935 INFO L388 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 [2021-12-16 05:43:54,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:43:54,790 INFO L354 Elim1Store]: treesize reduction 79, result has 19.4 percent of original size [2021-12-16 05:43:54,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 218 treesize of output 120 [2021-12-16 05:43:54,822 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-12-16 05:43:54,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 105 [2021-12-16 05:43:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 05:43:55,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:43:57,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:57,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 154 [2021-12-16 05:43:57,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:43:57,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 133 [2021-12-16 05:43:57,587 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_130 (_ BitVec 32)) (v_arrayElimArr_27 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_28 (Array (_ BitVec 32) (_ BitVec 32)))) (or (let ((.cse5 (store |c_#memory_$Pointer$.offset| v_~head~0.base_130 v_arrayElimArr_28)) (.cse2 (store |c_#memory_$Pointer$.base| v_~head~0.base_130 v_arrayElimArr_27)) (.cse6 (bvadd c_~head~0.offset (_ bv4 32)))) (let ((.cse3 (select (select .cse2 c_~head~0.base) .cse6)) (.cse4 (bvadd (select (select .cse5 c_~head~0.base) .cse6) (_ bv4 32)))) (let ((.cse0 (select (select .cse5 .cse3) .cse4))) (let ((.cse1 (bvadd .cse0 (_ bv8 32)))) (and (bvule (bvadd .cse0 (_ bv4 32)) .cse1) (bvule .cse1 (select (store |c_#length| v_~head~0.base_130 (_ bv8 32)) (select (select .cse2 .cse3) .cse4)))))))) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_130))) (not (= (select v_arrayElimArr_27 (_ bv4 32)) c_~head~0.base)) (not (= (select v_arrayElimArr_28 (_ bv4 32)) c_~head~0.offset)))) is different from false [2021-12-16 05:43:57,590 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:43:57,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791056311] [2021-12-16 05:43:57,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791056311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:43:57,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1417619725] [2021-12-16 05:43:57,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:43:57,591 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 05:43:57,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 05:43:57,592 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) [2021-12-16 05:43:57,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-12-16 05:43:58,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 05:43:58,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:43:58,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-16 05:43:58,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:43:58,093 INFO L388 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 [2021-12-16 05:43:58,097 INFO L388 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 [2021-12-16 05:43:58,267 INFO L388 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 [2021-12-16 05:43:58,274 INFO L388 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 [2021-12-16 05:43:58,349 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-16 05:43:58,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-16 05:43:58,372 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 05:43:58,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-16 05:43:58,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:58,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:59,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:59,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-16 05:43:59,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:59,381 INFO L388 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 45 treesize of output 39 [2021-12-16 05:43:59,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:59,396 INFO L388 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 18 treesize of output 20 [2021-12-16 05:43:59,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:43:59,417 INFO L354 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2021-12-16 05:43:59,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 29 [2021-12-16 05:43:59,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:59,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:43:59,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:44:00,045 INFO L354 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2021-12-16 05:44:00,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 59 [2021-12-16 05:44:00,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:44:00,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:44:00,104 INFO L354 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2021-12-16 05:44:00,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 50 [2021-12-16 05:44:00,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:44:00,133 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-16 05:44:00,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2021-12-16 05:44:00,152 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-16 05:44:00,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-16 05:44:00,172 INFO L388 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 [2021-12-16 05:44:02,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:44:02,589 INFO L354 Elim1Store]: treesize reduction 79, result has 19.4 percent of original size [2021-12-16 05:44:02,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 218 treesize of output 120 [2021-12-16 05:44:02,621 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-12-16 05:44:02,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 105 [2021-12-16 05:44:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:44:03,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:44:03,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:44:03,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 154 [2021-12-16 05:44:03,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:44:03,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 133 [2021-12-16 05:44:04,095 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_136 (_ BitVec 32)) (v_arrayElimArr_33 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_34 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_136))) (not (= (select v_arrayElimArr_33 (_ bv4 32)) c_~head~0.base)) (not (= (select v_arrayElimArr_34 (_ bv4 32)) c_~head~0.offset)) (let ((.cse5 (store |c_#memory_$Pointer$.offset| v_~head~0.base_136 v_arrayElimArr_34)) (.cse2 (store |c_#memory_$Pointer$.base| v_~head~0.base_136 v_arrayElimArr_33)) (.cse6 (bvadd c_~head~0.offset (_ bv4 32)))) (let ((.cse3 (select (select .cse2 c_~head~0.base) .cse6)) (.cse4 (bvadd (select (select .cse5 c_~head~0.base) .cse6) (_ bv4 32)))) (let ((.cse0 (select (select .cse5 .cse3) .cse4))) (let ((.cse1 (bvadd .cse0 (_ bv8 32)))) (and (bvule (bvadd .cse0 (_ bv4 32)) .cse1) (bvule .cse1 (select (store |c_#length| v_~head~0.base_136 (_ bv8 32)) (select (select .cse2 .cse3) .cse4)))))))))) is different from false [2021-12-16 05:44:04,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1417619725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:44:04,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:44:04,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 38 [2021-12-16 05:44:04,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104235067] [2021-12-16 05:44:04,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:44:04,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-16 05:44:04,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:44:04,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-16 05:44:04,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2013, Unknown=9, NotChecked=182, Total=2352 [2021-12-16 05:44:04,101 INFO L87 Difference]: Start difference. First operand 116 states and 139 transitions. Second operand has 39 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 35 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 05:44:05,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:44:05,279 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2021-12-16 05:44:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 05:44:05,280 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 35 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2021-12-16 05:44:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:44:05,288 INFO L225 Difference]: With dead ends: 121 [2021-12-16 05:44:05,288 INFO L226 Difference]: Without dead ends: 121 [2021-12-16 05:44:05,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 66 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=188, Invalid=2550, Unknown=26, NotChecked=206, Total=2970 [2021-12-16 05:44:05,292 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 621 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:44:05,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1075 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 621 Unchecked, 0.2s Time] [2021-12-16 05:44:05,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-16 05:44:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2021-12-16 05:44:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.5294117647058822) internal successors, (130), 109 states have internal predecessors, (130), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:44:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2021-12-16 05:44:05,305 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 49 [2021-12-16 05:44:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:44:05,305 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2021-12-16 05:44:05,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 35 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 05:44:05,306 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2021-12-16 05:44:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 05:44:05,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:44:05,306 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:44:05,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-16 05:44:05,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-12-16 05:44:05,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-16 05:44:05,718 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:44:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:44:05,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1277828622, now seen corresponding path program 1 times [2021-12-16 05:44:05,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:44:05,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592890851] [2021-12-16 05:44:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:44:05,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:44:05,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:44:05,721 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:44:05,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-16 05:44:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:44:05,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 05:44:05,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:44:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 05:44:06,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:44:06,015 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:44:06,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592890851] [2021-12-16 05:44:06,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592890851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:44:06,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:44:06,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:44:06,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632038464] [2021-12-16 05:44:06,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:44:06,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:44:06,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:44:06,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:44:06,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:44:06,017 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 05:44:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:44:06,195 INFO L93 Difference]: Finished difference Result 201 states and 218 transitions. [2021-12-16 05:44:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:44:06,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2021-12-16 05:44:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:44:06,196 INFO L225 Difference]: With dead ends: 201 [2021-12-16 05:44:06,197 INFO L226 Difference]: Without dead ends: 201 [2021-12-16 05:44:06,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:44:06,197 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 208 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:44:06,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 325 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:44:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-16 05:44:06,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 116. [2021-12-16 05:44:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.5176470588235293) internal successors, (129), 109 states have internal predecessors, (129), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:44:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2021-12-16 05:44:06,200 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 52 [2021-12-16 05:44:06,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:44:06,200 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2021-12-16 05:44:06,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 05:44:06,200 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2021-12-16 05:44:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 05:44:06,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:44:06,201 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:44:06,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-16 05:44:06,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:44:06,411 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [insert_listErr0REQUIRES_VIOLATION, insert_listErr1REQUIRES_VIOLATION, insert_listErr2REQUIRES_VIOLATION, insert_listErr3REQUIRES_VIOLATION (and 29 more)] === [2021-12-16 05:44:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:44:06,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1727833039, now seen corresponding path program 4 times [2021-12-16 05:44:06,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:44:06,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138120064] [2021-12-16 05:44:06,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:44:06,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:44:06,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:44:06,414 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:44:06,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-16 05:44:06,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:44:06,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:44:06,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-16 05:44:06,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:44:06,902 INFO L388 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 [2021-12-16 05:44:06,925 INFO L388 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 [2021-12-16 05:44:06,935 INFO L388 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 [2021-12-16 05:44:07,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:44:07,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:44:07,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:44:07,258 INFO L388 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 [2021-12-16 05:44:07,274 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 05:44:07,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-16 05:44:07,278 INFO L388 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 18 treesize of output 20 [2021-12-16 05:44:07,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:44:07,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:44:07,789 INFO L354 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2021-12-16 05:44:07,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 62 [2021-12-16 05:44:07,802 INFO L354 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2021-12-16 05:44:07,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 32 [2021-12-16 05:44:07,816 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-16 05:44:07,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 40 [2021-12-16 05:44:07,845 INFO L388 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 47 treesize of output 37 [2021-12-16 05:44:08,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:44:08,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-16 05:44:08,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:44:08,505 INFO L354 Elim1Store]: treesize reduction 80, result has 28.6 percent of original size [2021-12-16 05:44:08,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 158 treesize of output 143 [2021-12-16 05:44:08,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:44:08,593 INFO L354 Elim1Store]: treesize reduction 100, result has 28.6 percent of original size [2021-12-16 05:44:08,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 158 treesize of output 189 [2021-12-16 05:44:08,678 INFO L354 Elim1Store]: treesize reduction 5, result has 91.8 percent of original size [2021-12-16 05:44:08,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 247 [2021-12-16 05:44:08,684 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:44:08,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138120064] [2021-12-16 05:44:08,684 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-16 05:44:08,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1122929058] [2021-12-16 05:44:08,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:44:08,685 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 05:44:08,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 05:44:08,686 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 05:44:08,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-12-16 05:44:08,897 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@71011140 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.variables.ProgramVarUtils.constructConstantForAuxVar(ProgramVarUtils.java:119) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.computeClosedFormula(UnmodifiableTransFormula.java:172) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.(UnmodifiableTransFormula.java:95) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:274) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.decoupleArrayValues(TransFormulaUtils.java:1226) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:388) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-16 05:44:08,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281933271] [2021-12-16 05:44:08,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:44:08,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:44:08,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:44:08,901 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 05:44:08,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-16 05:44:09,020 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@71011140 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.variables.ProgramVarUtils.constructConstantForAuxVar(ProgramVarUtils.java:119) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.computeClosedFormula(UnmodifiableTransFormula.java:172) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.(UnmodifiableTransFormula.java:95) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:274) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.decoupleArrayValues(TransFormulaUtils.java:1226) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:388) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-16 05:44:09,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:44:09,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-16 05:44:09,022 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-12-16 05:44:09,022 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-16 05:44:09,027 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (32 of 33 remaining) [2021-12-16 05:44:09,028 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr0REQUIRES_VIOLATION (31 of 33 remaining) [2021-12-16 05:44:09,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr1REQUIRES_VIOLATION (30 of 33 remaining) [2021-12-16 05:44:09,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr2REQUIRES_VIOLATION (29 of 33 remaining) [2021-12-16 05:44:09,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr3REQUIRES_VIOLATION (28 of 33 remaining) [2021-12-16 05:44:09,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr4REQUIRES_VIOLATION (27 of 33 remaining) [2021-12-16 05:44:09,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr5REQUIRES_VIOLATION (26 of 33 remaining) [2021-12-16 05:44:09,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr6REQUIRES_VIOLATION (25 of 33 remaining) [2021-12-16 05:44:09,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location insert_listErr7REQUIRES_VIOLATION (24 of 33 remaining) [2021-12-16 05:44:09,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (23 of 33 remaining) [2021-12-16 05:44:09,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (22 of 33 remaining) [2021-12-16 05:44:09,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (21 of 33 remaining) [2021-12-16 05:44:09,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (20 of 33 remaining) [2021-12-16 05:44:09,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (19 of 33 remaining) [2021-12-16 05:44:09,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (18 of 33 remaining) [2021-12-16 05:44:09,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (17 of 33 remaining) [2021-12-16 05:44:09,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (16 of 33 remaining) [2021-12-16 05:44:09,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (15 of 33 remaining) [2021-12-16 05:44:09,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (14 of 33 remaining) [2021-12-16 05:44:09,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (13 of 33 remaining) [2021-12-16 05:44:09,032 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (12 of 33 remaining) [2021-12-16 05:44:09,032 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (11 of 33 remaining) [2021-12-16 05:44:09,032 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (10 of 33 remaining) [2021-12-16 05:44:09,032 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (9 of 33 remaining) [2021-12-16 05:44:09,032 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (8 of 33 remaining) [2021-12-16 05:44:09,032 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (7 of 33 remaining) [2021-12-16 05:44:09,032 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION (6 of 33 remaining) [2021-12-16 05:44:09,033 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE (5 of 33 remaining) [2021-12-16 05:44:09,033 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE (4 of 33 remaining) [2021-12-16 05:44:09,033 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE (3 of 33 remaining) [2021-12-16 05:44:09,033 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION (2 of 33 remaining) [2021-12-16 05:44:09,033 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION (1 of 33 remaining) [2021-12-16 05:44:09,033 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK (0 of 33 remaining) [2021-12-16 05:44:09,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-12-16 05:44:09,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-16 05:44:09,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-16 05:44:09,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:44:09,658 INFO L732 BasicCegarLoop]: Path program histogram: [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:44:09,665 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-16 05:44:09,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 05:44:09 BoogieIcfgContainer [2021-12-16 05:44:09,688 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-16 05:44:09,689 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 05:44:09,689 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 05:44:09,689 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 05:44:09,689 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:43:18" (3/4) ... [2021-12-16 05:44:09,691 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-16 05:44:09,692 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 05:44:09,692 INFO L158 Benchmark]: Toolchain (without parser) took 52054.79ms. Allocated memory was 54.5MB in the beginning and 144.7MB in the end (delta: 90.2MB). Free memory was 35.4MB in the beginning and 38.8MB in the end (delta: -3.4MB). Peak memory consumption was 85.8MB. Max. memory is 16.1GB. [2021-12-16 05:44:09,694 INFO L158 Benchmark]: CDTParser took 0.68ms. Allocated memory is still 44.0MB. Free memory was 26.2MB in the beginning and 26.1MB in the end (delta: 53.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 05:44:09,694 INFO L158 Benchmark]: CACSL2BoogieTranslator took 535.57ms. Allocated memory is still 54.5MB. Free memory was 35.2MB in the beginning and 28.7MB in the end (delta: 6.6MB). Peak memory consumption was 14.5MB. Max. memory is 16.1GB. [2021-12-16 05:44:09,695 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.07ms. Allocated memory is still 54.5MB. Free memory was 28.5MB in the beginning and 26.1MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 05:44:09,695 INFO L158 Benchmark]: Boogie Preprocessor took 39.55ms. Allocated memory is still 54.5MB. Free memory was 26.1MB in the beginning and 24.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 05:44:09,696 INFO L158 Benchmark]: RCFGBuilder took 510.70ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 24.2MB in the beginning and 41.5MB in the end (delta: -17.3MB). Peak memory consumption was 4.0MB. Max. memory is 16.1GB. [2021-12-16 05:44:09,696 INFO L158 Benchmark]: TraceAbstraction took 50900.12ms. Allocated memory was 67.1MB in the beginning and 144.7MB in the end (delta: 77.6MB). Free memory was 40.9MB in the beginning and 38.8MB in the end (delta: 2.1MB). Peak memory consumption was 79.9MB. Max. memory is 16.1GB. [2021-12-16 05:44:09,696 INFO L158 Benchmark]: Witness Printer took 3.12ms. Allocated memory is still 144.7MB. Free memory is still 38.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 05:44:09,698 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68ms. Allocated memory is still 44.0MB. Free memory was 26.2MB in the beginning and 26.1MB in the end (delta: 53.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 535.57ms. Allocated memory is still 54.5MB. Free memory was 35.2MB in the beginning and 28.7MB in the end (delta: 6.6MB). Peak memory consumption was 14.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.07ms. Allocated memory is still 54.5MB. Free memory was 28.5MB in the beginning and 26.1MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.55ms. Allocated memory is still 54.5MB. Free memory was 26.1MB in the beginning and 24.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 510.70ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 24.2MB in the beginning and 41.5MB in the end (delta: -17.3MB). Peak memory consumption was 4.0MB. Max. memory is 16.1GB. * TraceAbstraction took 50900.12ms. Allocated memory was 67.1MB in the beginning and 144.7MB in the end (delta: 77.6MB). Free memory was 40.9MB in the beginning and 38.8MB in the end (delta: 2.1MB). Peak memory consumption was 79.9MB. Max. memory is 16.1GB. * Witness Printer took 3.12ms. Allocated memory is still 144.7MB. Free memory is still 38.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 813]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L769] mlist *head; [L804] int i; [L805] mlist *mylist = 0; [L806] mlist *temp; [L807] CALL insert_list(mylist,2) [L792] l = (mlist*)malloc(sizeof(mlist)) [L793] COND TRUE head==((void *)0) [L794] l->key = k [L795] l->next = ((void *)0) [L800] head = l [L801] return 0; [L807] RET insert_list(mylist,2) [L808] CALL insert_list(mylist,5) [L792] l = (mlist*)malloc(sizeof(mlist)) [L793] COND FALSE !(head==((void *)0)) [L797] l->key = k [L798] l->next = head [L800] head = l [L801] return 0; [L808] RET insert_list(mylist,5) [L809] CALL insert_list(mylist,1) [L792] l = (mlist*)malloc(sizeof(mlist)) [L793] COND FALSE !(head==((void *)0)) [L797] l->key = k [L798] l->next = head [L800] head = l [L801] return 0; [L809] RET insert_list(mylist,1) [L810] CALL insert_list(mylist,3) [L792] l = (mlist*)malloc(sizeof(mlist)) [L793] COND FALSE !(head==((void *)0)) [L797] l->key = k [L798] l->next = head [L800] head = l [L801] return 0; [L810] RET insert_list(mylist,3) [L811] mylist = head [L812] COND TRUE \read(*mylist) [L813] EXPR mylist->next [L813] mylist = mylist->next [L812] COND TRUE \read(*mylist) [L813] EXPR mylist->next [L813] mylist = mylist->next [L812] COND TRUE \read(*mylist) [L813] EXPR mylist->next [L813] mylist = mylist->next [L812] COND TRUE \read(*mylist) [L813] EXPR mylist->next [L813] mylist = mylist->next [L812] COND TRUE \read(*mylist) [L813] mylist->next - UnprovableResult [Line: 794]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 794]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 795]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 795]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 797]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 797]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 798]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 798]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 813]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 772]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 772]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 773]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 773]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 816]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 816]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 15]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 781]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 781]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 782]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 782]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 785]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 785]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 787]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 787]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 787]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 787]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 820]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 820]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 803]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 91 locations, 33 error locations. Started 1 CEGAR loops. OverallTime: 50.8s, OverallIterations: 17, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 8.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2279 SdHoareTripleChecker+Valid, 3.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2279 mSDsluCounter, 6444 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1955 IncrementalHoareTripleChecker+Unchecked, 5325 mSDsCounter, 179 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2979 IncrementalHoareTripleChecker+Invalid, 5113 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 179 mSolverCounterUnsat, 1119 mSDtfsCounter, 2979 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1199 GetRequests, 847 SyntacticMatches, 37 SemanticMatches, 315 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 2516 ImplicationChecksByTransitivity, 15.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=14, InterpolantAutomatonStates: 203, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 652 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 31.1s InterpolantComputationTime, 932 NumberOfCodeBlocks, 899 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 985 ConstructedInterpolants, 188 QuantifiedInterpolants, 18044 SizeOfPredicates, 226 NumberOfNonLiveVariables, 6110 ConjunctsInSsa, 816 ConjunctsInUnsatCore, 24 InterpolantComputations, 8 PerfectInterpolantSequences, 646/917 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-16 05:44:09,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN