./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 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/uthash-2.0.2/uthash_SAX_test10-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22840dbbc7fdeff8c5ae44a2e4ee4ab6a60b4cab9f47ba8847305b912adb9a2c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 13:15:57,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 13:15:57,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 13:15:57,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 13:15:57,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 13:15:57,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 13:15:57,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 13:15:57,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 13:15:57,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 13:15:57,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 13:15:57,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 13:15:57,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 13:15:57,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 13:15:57,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 13:15:57,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 13:15:57,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 13:15:57,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 13:15:57,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 13:15:57,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 13:15:57,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 13:15:57,875 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 13:15:57,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 13:15:57,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 13:15:57,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 13:15:57,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 13:15:57,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 13:15:57,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 13:15:57,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 13:15:57,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 13:15:57,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 13:15:57,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 13:15:57,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 13:15:57,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 13:15:57,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 13:15:57,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 13:15:57,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 13:15:57,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 13:15:57,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 13:15:57,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 13:15:57,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 13:15:57,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 13:15:57,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 13:15:57,900 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 13:15:57,936 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 13:15:57,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 13:15:57,937 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 13:15:57,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 13:15:57,939 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 13:15:57,939 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 13:15:57,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 13:15:57,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 13:15:57,940 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 13:15:57,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 13:15:57,941 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 13:15:57,941 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 13:15:57,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 13:15:57,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 13:15:57,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 13:15:57,942 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 13:15:57,942 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 13:15:57,942 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 13:15:57,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 13:15:57,943 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 13:15:57,943 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 13:15:57,943 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 13:15:57,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 13:15:57,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 13:15:57,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 13:15:57,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 13:15:57,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 13:15:57,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 13:15:57,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 13:15:57,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 13:15:57,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22840dbbc7fdeff8c5ae44a2e4ee4ab6a60b4cab9f47ba8847305b912adb9a2c [2022-07-20 13:15:58,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 13:15:58,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 13:15:58,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 13:15:58,229 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 13:15:58,230 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 13:15:58,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i [2022-07-20 13:15:58,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3c843ad2/e1df360b1763478fa5c29e5bcd1c07a6/FLAG1fa0bf597 [2022-07-20 13:15:58,822 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 13:15:58,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i [2022-07-20 13:15:58,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3c843ad2/e1df360b1763478fa5c29e5bcd1c07a6/FLAG1fa0bf597 [2022-07-20 13:15:59,264 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3c843ad2/e1df360b1763478fa5c29e5bcd1c07a6 [2022-07-20 13:15:59,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 13:15:59,268 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 13:15:59,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 13:15:59,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 13:15:59,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 13:15:59,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:15:59" (1/1) ... [2022-07-20 13:15:59,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a184980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:15:59, skipping insertion in model container [2022-07-20 13:15:59,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:15:59" (1/1) ... [2022-07-20 13:15:59,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 13:15:59,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 13:15:59,663 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/uthash-2.0.2/uthash_SAX_test10-2.i[33022,33035] [2022-07-20 13:15:59,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 13:15:59,887 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-20 13:15:59,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@163fc082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:15:59, skipping insertion in model container [2022-07-20 13:15:59,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 13:15:59,889 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-20 13:15:59,891 INFO L158 Benchmark]: Toolchain (without parser) took 621.13ms. Allocated memory was 90.2MB in the beginning and 123.7MB in the end (delta: 33.6MB). Free memory was 45.6MB in the beginning and 76.3MB in the end (delta: -30.7MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2022-07-20 13:15:59,891 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 90.2MB. Free memory is still 65.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 13:15:59,892 INFO L158 Benchmark]: CACSL2BoogieTranslator took 617.51ms. Allocated memory was 90.2MB in the beginning and 123.7MB in the end (delta: 33.6MB). Free memory was 45.4MB in the beginning and 76.3MB in the end (delta: -30.9MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2022-07-20 13:15:59,893 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 90.2MB. Free memory is still 65.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 617.51ms. Allocated memory was 90.2MB in the beginning and 123.7MB in the end (delta: 33.6MB). Free memory was 45.4MB in the beginning and 76.3MB in the end (delta: -30.9MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22840dbbc7fdeff8c5ae44a2e4ee4ab6a60b4cab9f47ba8847305b912adb9a2c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 13:16:01,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 13:16:01,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 13:16:01,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 13:16:01,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 13:16:01,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 13:16:01,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 13:16:01,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 13:16:01,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 13:16:01,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 13:16:01,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 13:16:01,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 13:16:01,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 13:16:01,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 13:16:01,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 13:16:01,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 13:16:01,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 13:16:01,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 13:16:01,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 13:16:01,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 13:16:01,814 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 13:16:01,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 13:16:01,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 13:16:01,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 13:16:01,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 13:16:01,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 13:16:01,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 13:16:01,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 13:16:01,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 13:16:01,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 13:16:01,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 13:16:01,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 13:16:01,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 13:16:01,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 13:16:01,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 13:16:01,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 13:16:01,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 13:16:01,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 13:16:01,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 13:16:01,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 13:16:01,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 13:16:01,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 13:16:01,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-20 13:16:01,889 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 13:16:01,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 13:16:01,890 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 13:16:01,890 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 13:16:01,891 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 13:16:01,891 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 13:16:01,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 13:16:01,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 13:16:01,892 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 13:16:01,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 13:16:01,893 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 13:16:01,893 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 13:16:01,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 13:16:01,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 13:16:01,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 13:16:01,894 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 13:16:01,894 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 13:16:01,894 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 13:16:01,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 13:16:01,895 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 13:16:01,895 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-20 13:16:01,895 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-20 13:16:01,895 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 13:16:01,895 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 13:16:01,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 13:16:01,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 13:16:01,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 13:16:01,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 13:16:01,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 13:16:01,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 13:16:01,897 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-20 13:16:01,897 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-20 13:16:01,897 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-20 13:16:01,897 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22840dbbc7fdeff8c5ae44a2e4ee4ab6a60b4cab9f47ba8847305b912adb9a2c [2022-07-20 13:16:02,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 13:16:02,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 13:16:02,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 13:16:02,230 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 13:16:02,230 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 13:16:02,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i [2022-07-20 13:16:02,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ae4fe63/2be9b34abda34b23a0718e2544c040fc/FLAGee5f9f599 [2022-07-20 13:16:02,871 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 13:16:02,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-2.i [2022-07-20 13:16:02,894 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ae4fe63/2be9b34abda34b23a0718e2544c040fc/FLAGee5f9f599 [2022-07-20 13:16:03,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ae4fe63/2be9b34abda34b23a0718e2544c040fc [2022-07-20 13:16:03,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 13:16:03,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 13:16:03,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 13:16:03,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 13:16:03,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 13:16:03,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:16:03" (1/1) ... [2022-07-20 13:16:03,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f4055f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:03, skipping insertion in model container [2022-07-20 13:16:03,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:16:03" (1/1) ... [2022-07-20 13:16:03,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 13:16:03,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 13:16:03,711 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/uthash-2.0.2/uthash_SAX_test10-2.i[33022,33035] [2022-07-20 13:16:03,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 13:16:03,962 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-20 13:16:03,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 13:16:03,987 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/uthash-2.0.2/uthash_SAX_test10-2.i[33022,33035] [2022-07-20 13:16:04,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 13:16:04,098 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 13:16:04,123 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/uthash-2.0.2/uthash_SAX_test10-2.i[33022,33035] [2022-07-20 13:16:04,229 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 13:16:04,270 INFO L208 MainTranslator]: Completed translation [2022-07-20 13:16:04,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:04 WrapperNode [2022-07-20 13:16:04,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 13:16:04,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 13:16:04,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 13:16:04,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 13:16:04,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:04" (1/1) ... [2022-07-20 13:16:04,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:04" (1/1) ... [2022-07-20 13:16:04,450 INFO L137 Inliner]: procedures = 180, calls = 575, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2348 [2022-07-20 13:16:04,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 13:16:04,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 13:16:04,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 13:16:04,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 13:16:04,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:04" (1/1) ... [2022-07-20 13:16:04,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:04" (1/1) ... [2022-07-20 13:16:04,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:04" (1/1) ... [2022-07-20 13:16:04,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:04" (1/1) ... [2022-07-20 13:16:04,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:04" (1/1) ... [2022-07-20 13:16:04,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:04" (1/1) ... [2022-07-20 13:16:04,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:04" (1/1) ... [2022-07-20 13:16:04,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 13:16:04,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 13:16:04,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 13:16:04,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 13:16:04,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:04" (1/1) ... [2022-07-20 13:16:04,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 13:16:04,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 13:16:04,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 13:16:04,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 13:16:04,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-20 13:16:04,687 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-07-20 13:16:04,687 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-07-20 13:16:04,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-20 13:16:04,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-20 13:16:04,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-20 13:16:04,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-20 13:16:04,689 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-20 13:16:04,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 13:16:04,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 13:16:04,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 13:16:04,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 13:16:04,690 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-20 13:16:04,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 13:16:04,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 13:16:04,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-20 13:16:04,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-20 13:16:04,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 13:16:04,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 13:16:05,058 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 13:16:05,060 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 13:16:05,063 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 13:16:12,237 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 13:16:12,263 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 13:16:12,264 INFO L299 CfgBuilder]: Removed 160 assume(true) statements. [2022-07-20 13:16:12,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:16:12 BoogieIcfgContainer [2022-07-20 13:16:12,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 13:16:12,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 13:16:12,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 13:16:12,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 13:16:12,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:16:03" (1/3) ... [2022-07-20 13:16:12,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49538c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:16:12, skipping insertion in model container [2022-07-20 13:16:12,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:16:04" (2/3) ... [2022-07-20 13:16:12,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49538c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:16:12, skipping insertion in model container [2022-07-20 13:16:12,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:16:12" (3/3) ... [2022-07-20 13:16:12,275 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test10-2.i [2022-07-20 13:16:12,284 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 13:16:12,284 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1095 error locations. [2022-07-20 13:16:12,358 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 13:16:12,363 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@17e1ed02, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@284582d3 [2022-07-20 13:16:12,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1095 error locations. [2022-07-20 13:16:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 2259 states, 1152 states have (on average 2.2144097222222223) internal successors, (2551), 2245 states have internal predecessors, (2551), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 13:16:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-20 13:16:12,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:12,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-20 13:16:12,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:12,385 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2022-07-20 13:16:12,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:12,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938266522] [2022-07-20 13:16:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:12,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:12,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:12,407 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:12,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-20 13:16:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:12,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:12,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:12,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:16:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:12,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:12,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:12,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938266522] [2022-07-20 13:16:12,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938266522] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:12,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:12,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 13:16:12,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396767073] [2022-07-20 13:16:12,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:12,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:12,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:12,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:12,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:12,787 INFO L87 Difference]: Start difference. First operand has 2259 states, 1152 states have (on average 2.2144097222222223) internal successors, (2551), 2245 states have internal predecessors, (2551), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:16,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:16,188 INFO L93 Difference]: Finished difference Result 2934 states and 3120 transitions. [2022-07-20 13:16:16,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:16,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-20 13:16:16,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:16,215 INFO L225 Difference]: With dead ends: 2934 [2022-07-20 13:16:16,215 INFO L226 Difference]: Without dead ends: 2932 [2022-07-20 13:16:16,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:16,221 INFO L413 NwaCegarLoop]: 1394 mSDtfsCounter, 2142 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:16,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2152 Valid, 1869 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-20 13:16:16,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2022-07-20 13:16:16,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 2401. [2022-07-20 13:16:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2401 states, 1318 states have (on average 2.0515933232169954) internal successors, (2704), 2385 states have internal predecessors, (2704), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 13:16:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 2736 transitions. [2022-07-20 13:16:16,369 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 2736 transitions. Word has length 3 [2022-07-20 13:16:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:16,369 INFO L495 AbstractCegarLoop]: Abstraction has 2401 states and 2736 transitions. [2022-07-20 13:16:16,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:16,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 2736 transitions. [2022-07-20 13:16:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-20 13:16:16,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:16,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-20 13:16:16,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:16,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:16,580 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:16,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:16,581 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2022-07-20 13:16:16,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:16,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097218596] [2022-07-20 13:16:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:16,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:16,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:16,584 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:16,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-20 13:16:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:16,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 13:16:16,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:16,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:16:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:16,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:16,775 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:16,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097218596] [2022-07-20 13:16:16,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097218596] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:16,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:16,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 13:16:16,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896258030] [2022-07-20 13:16:16,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:16,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:16,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:16,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:16,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:16,778 INFO L87 Difference]: Start difference. First operand 2401 states and 2736 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:21,191 INFO L93 Difference]: Finished difference Result 3371 states and 3798 transitions. [2022-07-20 13:16:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:21,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-20 13:16:21,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:21,219 INFO L225 Difference]: With dead ends: 3371 [2022-07-20 13:16:21,219 INFO L226 Difference]: Without dead ends: 3371 [2022-07-20 13:16:21,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:21,221 INFO L413 NwaCegarLoop]: 1951 mSDtfsCounter, 1054 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 3245 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:21,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 3245 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 13:16:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2022-07-20 13:16:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2850. [2022-07-20 13:16:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 1765 states have (on average 2.009631728045326) internal successors, (3547), 2831 states have internal predecessors, (3547), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-20 13:16:21,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 3585 transitions. [2022-07-20 13:16:21,288 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 3585 transitions. Word has length 3 [2022-07-20 13:16:21,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:21,288 INFO L495 AbstractCegarLoop]: Abstraction has 2850 states and 3585 transitions. [2022-07-20 13:16:21,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 3585 transitions. [2022-07-20 13:16:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 13:16:21,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:21,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:21,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:21,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:21,500 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:21,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2022-07-20 13:16:21,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:21,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237089427] [2022-07-20 13:16:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:21,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:21,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:21,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:21,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-20 13:16:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:21,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 13:16:21,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:21,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:16:21,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:16:21,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 13:16:21,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 13:16:21,766 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 13:16:21,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-20 13:16:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:21,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:21,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:21,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237089427] [2022-07-20 13:16:21,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237089427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:21,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:21,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:21,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484854890] [2022-07-20 13:16:21,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:21,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:21,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:21,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:21,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:21,795 INFO L87 Difference]: Start difference. First operand 2850 states and 3585 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:30,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:30,984 INFO L93 Difference]: Finished difference Result 5481 states and 6388 transitions. [2022-07-20 13:16:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:30,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 13:16:30,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:31,004 INFO L225 Difference]: With dead ends: 5481 [2022-07-20 13:16:31,004 INFO L226 Difference]: Without dead ends: 5481 [2022-07-20 13:16:31,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:31,006 INFO L413 NwaCegarLoop]: 847 mSDtfsCounter, 2765 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 4255 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2775 SdHoareTripleChecker+Valid, 2890 SdHoareTripleChecker+Invalid, 4283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:31,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2775 Valid, 2890 Invalid, 4283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4255 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-07-20 13:16:31,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2022-07-20 13:16:31,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 3569. [2022-07-20 13:16:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 2484 states have (on average 2.0426731078904994) internal successors, (5074), 3544 states have internal predecessors, (5074), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:31,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 5124 transitions. [2022-07-20 13:16:31,090 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 5124 transitions. Word has length 7 [2022-07-20 13:16:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:31,091 INFO L495 AbstractCegarLoop]: Abstraction has 3569 states and 5124 transitions. [2022-07-20 13:16:31,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:31,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 5124 transitions. [2022-07-20 13:16:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 13:16:31,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:31,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:31,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:31,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:31,302 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:31,303 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2022-07-20 13:16:31,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:31,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221730781] [2022-07-20 13:16:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:31,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:31,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:31,306 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:31,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-20 13:16:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:31,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:31,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:31,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:16:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:31,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:31,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:31,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221730781] [2022-07-20 13:16:31,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221730781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:31,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:31,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 13:16:31,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367257790] [2022-07-20 13:16:31,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:31,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:31,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:31,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:31,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:31,513 INFO L87 Difference]: Start difference. First operand 3569 states and 5124 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:34,410 INFO L93 Difference]: Finished difference Result 4773 states and 6641 transitions. [2022-07-20 13:16:34,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:34,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 13:16:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:34,428 INFO L225 Difference]: With dead ends: 4773 [2022-07-20 13:16:34,428 INFO L226 Difference]: Without dead ends: 4773 [2022-07-20 13:16:34,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:34,429 INFO L413 NwaCegarLoop]: 2177 mSDtfsCounter, 1998 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 2933 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:34,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 2933 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 13:16:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2022-07-20 13:16:34,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 3478. [2022-07-20 13:16:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 2484 states have (on average 1.9569243156199678) internal successors, (4861), 3453 states have internal predecessors, (4861), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 4911 transitions. [2022-07-20 13:16:34,516 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 4911 transitions. Word has length 8 [2022-07-20 13:16:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:34,519 INFO L495 AbstractCegarLoop]: Abstraction has 3478 states and 4911 transitions. [2022-07-20 13:16:34,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:34,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 4911 transitions. [2022-07-20 13:16:34,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 13:16:34,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:34,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:34,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:34,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:34,723 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:34,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:34,724 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2022-07-20 13:16:34,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:34,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528834983] [2022-07-20 13:16:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:34,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:34,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:34,727 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:34,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-20 13:16:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:34,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 13:16:34,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:34,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:16:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:34,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:34,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:34,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528834983] [2022-07-20 13:16:34,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528834983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:34,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:34,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 13:16:34,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520972710] [2022-07-20 13:16:34,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:34,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:34,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:34,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:34,961 INFO L87 Difference]: Start difference. First operand 3478 states and 4911 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:39,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:39,382 INFO L93 Difference]: Finished difference Result 5193 states and 7269 transitions. [2022-07-20 13:16:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:39,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 13:16:39,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:39,398 INFO L225 Difference]: With dead ends: 5193 [2022-07-20 13:16:39,399 INFO L226 Difference]: Without dead ends: 5193 [2022-07-20 13:16:39,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:39,400 INFO L413 NwaCegarLoop]: 2557 mSDtfsCounter, 1369 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 3648 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:39,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 3648 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 13:16:39,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5193 states. [2022-07-20 13:16:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5193 to 3800. [2022-07-20 13:16:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 2816 states have (on average 1.9435369318181819) internal successors, (5473), 3775 states have internal predecessors, (5473), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:39,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 5523 transitions. [2022-07-20 13:16:39,511 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 5523 transitions. Word has length 8 [2022-07-20 13:16:39,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:39,512 INFO L495 AbstractCegarLoop]: Abstraction has 3800 states and 5523 transitions. [2022-07-20 13:16:39,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:39,512 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 5523 transitions. [2022-07-20 13:16:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 13:16:39,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:39,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:39,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:39,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:39,723 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2022-07-20 13:16:39,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:39,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760236629] [2022-07-20 13:16:39,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:39,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:39,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:39,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:39,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-20 13:16:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:39,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 13:16:39,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:39,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:39,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:39,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760236629] [2022-07-20 13:16:39,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760236629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:39,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:39,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:39,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794674019] [2022-07-20 13:16:39,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:39,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:39,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:39,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:39,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:39,909 INFO L87 Difference]: Start difference. First operand 3800 states and 5523 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:39,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:39,958 INFO L93 Difference]: Finished difference Result 3740 states and 5437 transitions. [2022-07-20 13:16:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:39,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 13:16:39,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:39,977 INFO L225 Difference]: With dead ends: 3740 [2022-07-20 13:16:39,978 INFO L226 Difference]: Without dead ends: 3740 [2022-07-20 13:16:39,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:39,981 INFO L413 NwaCegarLoop]: 2221 mSDtfsCounter, 1011 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 3437 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:39,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 3437 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:16:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2022-07-20 13:16:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3740. [2022-07-20 13:16:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3740 states, 2780 states have (on average 1.9377697841726618) internal successors, (5387), 3715 states have internal predecessors, (5387), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3740 states to 3740 states and 5437 transitions. [2022-07-20 13:16:40,053 INFO L78 Accepts]: Start accepts. Automaton has 3740 states and 5437 transitions. Word has length 11 [2022-07-20 13:16:40,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:40,053 INFO L495 AbstractCegarLoop]: Abstraction has 3740 states and 5437 transitions. [2022-07-20 13:16:40,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:40,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3740 states and 5437 transitions. [2022-07-20 13:16:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 13:16:40,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:40,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:40,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:40,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:40,265 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:40,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:40,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2022-07-20 13:16:40,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:40,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666765457] [2022-07-20 13:16:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:40,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:40,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:40,269 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:40,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-20 13:16:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:40,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:40,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:40,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:40,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:40,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666765457] [2022-07-20 13:16:40,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666765457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:40,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:40,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:16:40,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159271946] [2022-07-20 13:16:40,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:40,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:40,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:40,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:40,473 INFO L87 Difference]: Start difference. First operand 3740 states and 5437 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:40,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:40,566 INFO L93 Difference]: Finished difference Result 3712 states and 5381 transitions. [2022-07-20 13:16:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:40,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-20 13:16:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:40,585 INFO L225 Difference]: With dead ends: 3712 [2022-07-20 13:16:40,585 INFO L226 Difference]: Without dead ends: 3712 [2022-07-20 13:16:40,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:40,587 INFO L413 NwaCegarLoop]: 2176 mSDtfsCounter, 982 mSDsluCounter, 3385 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 5561 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:40,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [986 Valid, 5561 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 13:16:40,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2022-07-20 13:16:40,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3710. [2022-07-20 13:16:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3710 states, 2764 states have (on average 1.9280028943560057) internal successors, (5329), 3685 states have internal predecessors, (5329), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5379 transitions. [2022-07-20 13:16:40,652 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5379 transitions. Word has length 13 [2022-07-20 13:16:40,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:40,653 INFO L495 AbstractCegarLoop]: Abstraction has 3710 states and 5379 transitions. [2022-07-20 13:16:40,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:40,654 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5379 transitions. [2022-07-20 13:16:40,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 13:16:40,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:40,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:40,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:40,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:40,865 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:40,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:40,866 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2022-07-20 13:16:40,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:40,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942461297] [2022-07-20 13:16:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:40,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:40,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:40,868 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:40,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-20 13:16:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:41,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 13:16:41,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:41,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:41,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:41,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942461297] [2022-07-20 13:16:41,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942461297] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:41,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:41,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:41,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476880913] [2022-07-20 13:16:41,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:41,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:41,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:41,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:41,135 INFO L87 Difference]: Start difference. First operand 3710 states and 5379 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:41,188 INFO L93 Difference]: Finished difference Result 5158 states and 6946 transitions. [2022-07-20 13:16:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:41,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-20 13:16:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:41,200 INFO L225 Difference]: With dead ends: 5158 [2022-07-20 13:16:41,200 INFO L226 Difference]: Without dead ends: 5158 [2022-07-20 13:16:41,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:41,201 INFO L413 NwaCegarLoop]: 3496 mSDtfsCounter, 2102 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2112 SdHoareTripleChecker+Valid, 5112 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:41,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2112 Valid, 5112 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:16:41,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2022-07-20 13:16:41,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 3650. [2022-07-20 13:16:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3650 states, 2728 states have (on average 1.9219208211143695) internal successors, (5243), 3625 states have internal predecessors, (5243), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 5293 transitions. [2022-07-20 13:16:41,287 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 5293 transitions. Word has length 20 [2022-07-20 13:16:41,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:41,288 INFO L495 AbstractCegarLoop]: Abstraction has 3650 states and 5293 transitions. [2022-07-20 13:16:41,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:41,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 5293 transitions. [2022-07-20 13:16:41,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 13:16:41,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:41,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:41,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:41,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:41,501 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:41,502 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2022-07-20 13:16:41,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:41,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366133870] [2022-07-20 13:16:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:41,502 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:41,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:41,503 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:41,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-20 13:16:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 13:16:41,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:41,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:41,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:41,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366133870] [2022-07-20 13:16:41,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366133870] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:41,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:41,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:41,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383666723] [2022-07-20 13:16:41,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:41,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:16:41,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:41,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:16:41,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:41,726 INFO L87 Difference]: Start difference. First operand 3650 states and 5293 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:41,778 INFO L93 Difference]: Finished difference Result 4991 states and 6655 transitions. [2022-07-20 13:16:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:16:41,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-20 13:16:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:41,789 INFO L225 Difference]: With dead ends: 4991 [2022-07-20 13:16:41,789 INFO L226 Difference]: Without dead ends: 4991 [2022-07-20 13:16:41,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:16:41,790 INFO L413 NwaCegarLoop]: 3628 mSDtfsCounter, 2059 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2069 SdHoareTripleChecker+Valid, 5196 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:41,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2069 Valid, 5196 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:16:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2022-07-20 13:16:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 3518. [2022-07-20 13:16:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 2620 states have (on average 1.9026717557251909) internal successors, (4985), 3493 states have internal predecessors, (4985), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 5035 transitions. [2022-07-20 13:16:41,850 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 5035 transitions. Word has length 20 [2022-07-20 13:16:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:41,851 INFO L495 AbstractCegarLoop]: Abstraction has 3518 states and 5035 transitions. [2022-07-20 13:16:41,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:41,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 5035 transitions. [2022-07-20 13:16:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 13:16:41,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:41,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:41,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:42,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:42,063 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:42,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:42,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2022-07-20 13:16:42,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:42,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055119255] [2022-07-20 13:16:42,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:42,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:42,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:42,065 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:42,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-20 13:16:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:42,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:42,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:42,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:42,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:42,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055119255] [2022-07-20 13:16:42,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055119255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:42,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:42,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:16:42,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537670643] [2022-07-20 13:16:42,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:42,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:42,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:42,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:42,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:42,273 INFO L87 Difference]: Start difference. First operand 3518 states and 5035 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:42,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:42,373 INFO L93 Difference]: Finished difference Result 4956 states and 6589 transitions. [2022-07-20 13:16:42,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:42,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-20 13:16:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:42,384 INFO L225 Difference]: With dead ends: 4956 [2022-07-20 13:16:42,384 INFO L226 Difference]: Without dead ends: 4956 [2022-07-20 13:16:42,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:42,385 INFO L413 NwaCegarLoop]: 3588 mSDtfsCounter, 2030 mSDsluCounter, 5154 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 8742 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:42,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 8742 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 13:16:42,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4956 states. [2022-07-20 13:16:42,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4956 to 3488. [2022-07-20 13:16:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3488 states, 2604 states have (on average 1.892089093701997) internal successors, (4927), 3463 states have internal predecessors, (4927), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3488 states to 3488 states and 4977 transitions. [2022-07-20 13:16:42,460 INFO L78 Accepts]: Start accepts. Automaton has 3488 states and 4977 transitions. Word has length 22 [2022-07-20 13:16:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:42,460 INFO L495 AbstractCegarLoop]: Abstraction has 3488 states and 4977 transitions. [2022-07-20 13:16:42,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3488 states and 4977 transitions. [2022-07-20 13:16:42,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 13:16:42,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:42,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:42,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:42,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:42,671 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:42,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2022-07-20 13:16:42,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:42,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475354273] [2022-07-20 13:16:42,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:42,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:42,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:42,674 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:42,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-20 13:16:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:42,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:16:42,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:42,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:42,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:42,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475354273] [2022-07-20 13:16:42,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475354273] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:42,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:42,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:16:42,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333037271] [2022-07-20 13:16:42,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:42,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:42,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:42,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:42,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:42,907 INFO L87 Difference]: Start difference. First operand 3488 states and 4977 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:42,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:42,991 INFO L93 Difference]: Finished difference Result 4883 states and 6400 transitions. [2022-07-20 13:16:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:42,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-20 13:16:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:43,001 INFO L225 Difference]: With dead ends: 4883 [2022-07-20 13:16:43,002 INFO L226 Difference]: Without dead ends: 4883 [2022-07-20 13:16:43,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:43,003 INFO L413 NwaCegarLoop]: 3513 mSDtfsCounter, 1995 mSDsluCounter, 5039 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2005 SdHoareTripleChecker+Valid, 8552 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:43,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2005 Valid, 8552 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:16:43,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4883 states. [2022-07-20 13:16:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4883 to 3426. [2022-07-20 13:16:43,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 2556 states have (on average 1.859546165884194) internal successors, (4753), 3401 states have internal predecessors, (4753), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:43,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 4803 transitions. [2022-07-20 13:16:43,140 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 4803 transitions. Word has length 22 [2022-07-20 13:16:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:43,141 INFO L495 AbstractCegarLoop]: Abstraction has 3426 states and 4803 transitions. [2022-07-20 13:16:43,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:43,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 4803 transitions. [2022-07-20 13:16:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 13:16:43,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:43,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:43,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-07-20 13:16:43,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:43,354 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:43,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:43,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2022-07-20 13:16:43,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:43,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784724362] [2022-07-20 13:16:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:43,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:43,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:43,357 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:43,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-20 13:16:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:43,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 13:16:43,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:43,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:16:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:43,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:43,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:43,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784724362] [2022-07-20 13:16:43,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784724362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:43,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:43,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:43,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164187383] [2022-07-20 13:16:43,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:43,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:43,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:43,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:43,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:43,580 INFO L87 Difference]: Start difference. First operand 3426 states and 4803 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:46,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:46,746 INFO L93 Difference]: Finished difference Result 3878 states and 5162 transitions. [2022-07-20 13:16:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:16:46,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 13:16:46,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:46,753 INFO L225 Difference]: With dead ends: 3878 [2022-07-20 13:16:46,754 INFO L226 Difference]: Without dead ends: 3878 [2022-07-20 13:16:46,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:46,755 INFO L413 NwaCegarLoop]: 1244 mSDtfsCounter, 2745 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2751 SdHoareTripleChecker+Valid, 2342 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:46,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2751 Valid, 2342 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 13:16:46,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2022-07-20 13:16:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 3422. [2022-07-20 13:16:46,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 2556 states have (on average 1.85641627543036) internal successors, (4745), 3397 states have internal predecessors, (4745), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 4795 transitions. [2022-07-20 13:16:46,804 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 4795 transitions. Word has length 27 [2022-07-20 13:16:46,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:46,804 INFO L495 AbstractCegarLoop]: Abstraction has 3422 states and 4795 transitions. [2022-07-20 13:16:46,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:46,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 4795 transitions. [2022-07-20 13:16:46,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 13:16:46,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:46,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:46,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:47,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:47,015 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:47,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:47,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2022-07-20 13:16:47,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:47,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998488244] [2022-07-20 13:16:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:47,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:47,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:47,017 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:47,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-20 13:16:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:47,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 13:16:47,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:47,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:16:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:47,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:47,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:47,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998488244] [2022-07-20 13:16:47,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998488244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:47,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:47,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:47,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769240175] [2022-07-20 13:16:47,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:47,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:47,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:47,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:47,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:47,381 INFO L87 Difference]: Start difference. First operand 3422 states and 4795 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:52,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:52,096 INFO L93 Difference]: Finished difference Result 4323 states and 5779 transitions. [2022-07-20 13:16:52,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 13:16:52,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 13:16:52,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:52,105 INFO L225 Difference]: With dead ends: 4323 [2022-07-20 13:16:52,105 INFO L226 Difference]: Without dead ends: 4323 [2022-07-20 13:16:52,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:52,106 INFO L413 NwaCegarLoop]: 1654 mSDtfsCounter, 1907 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1907 SdHoareTripleChecker+Valid, 3817 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:52,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1907 Valid, 3817 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-07-20 13:16:52,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4323 states. [2022-07-20 13:16:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4323 to 3458. [2022-07-20 13:16:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3458 states, 2592 states have (on average 1.8464506172839505) internal successors, (4786), 3433 states have internal predecessors, (4786), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:52,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 4836 transitions. [2022-07-20 13:16:52,173 INFO L78 Accepts]: Start accepts. Automaton has 3458 states and 4836 transitions. Word has length 27 [2022-07-20 13:16:52,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:52,174 INFO L495 AbstractCegarLoop]: Abstraction has 3458 states and 4836 transitions. [2022-07-20 13:16:52,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:52,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states and 4836 transitions. [2022-07-20 13:16:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 13:16:52,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:52,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:52,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:52,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:52,387 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:52,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:52,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2022-07-20 13:16:52,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:52,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036180887] [2022-07-20 13:16:52,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:52,389 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:52,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:52,391 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:52,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-20 13:16:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:52,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 13:16:52,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:52,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:16:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:52,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:52,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:52,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036180887] [2022-07-20 13:16:52,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036180887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:52,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:52,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:52,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537718408] [2022-07-20 13:16:52,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:52,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:52,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:52,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:52,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:52,691 INFO L87 Difference]: Start difference. First operand 3458 states and 4836 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:16:57,223 INFO L93 Difference]: Finished difference Result 6686 states and 9193 transitions. [2022-07-20 13:16:57,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 13:16:57,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 13:16:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:16:57,240 INFO L225 Difference]: With dead ends: 6686 [2022-07-20 13:16:57,241 INFO L226 Difference]: Without dead ends: 6686 [2022-07-20 13:16:57,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:16:57,242 INFO L413 NwaCegarLoop]: 2703 mSDtfsCounter, 3693 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 2953 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3700 SdHoareTripleChecker+Valid, 4839 SdHoareTripleChecker+Invalid, 2996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-20 13:16:57,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3700 Valid, 4839 Invalid, 2996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2953 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-07-20 13:16:57,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6686 states. [2022-07-20 13:16:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6686 to 3454. [2022-07-20 13:16:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 2592 states have (on average 1.8433641975308641) internal successors, (4778), 3429 states have internal predecessors, (4778), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:16:57,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 4828 transitions. [2022-07-20 13:16:57,317 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 4828 transitions. Word has length 36 [2022-07-20 13:16:57,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:16:57,318 INFO L495 AbstractCegarLoop]: Abstraction has 3454 states and 4828 transitions. [2022-07-20 13:16:57,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:16:57,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 4828 transitions. [2022-07-20 13:16:57,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 13:16:57,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:16:57,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:16:57,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-20 13:16:57,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:16:57,531 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:16:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:16:57,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2022-07-20 13:16:57,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:16:57,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942666938] [2022-07-20 13:16:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:16:57,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:16:57,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:16:57,535 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:16:57,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-20 13:16:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:16:57,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 13:16:57,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:16:57,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:16:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:16:57,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:16:57,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:16:57,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942666938] [2022-07-20 13:16:57,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942666938] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:16:57,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:16:57,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:16:57,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107784967] [2022-07-20 13:16:57,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:16:57,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:16:57,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:16:57,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:16:57,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:16:57,899 INFO L87 Difference]: Start difference. First operand 3454 states and 4828 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:04,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:04,494 INFO L93 Difference]: Finished difference Result 6369 states and 8585 transitions. [2022-07-20 13:17:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 13:17:04,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 13:17:04,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:04,504 INFO L225 Difference]: With dead ends: 6369 [2022-07-20 13:17:04,504 INFO L226 Difference]: Without dead ends: 6369 [2022-07-20 13:17:04,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:04,505 INFO L413 NwaCegarLoop]: 2653 mSDtfsCounter, 3063 mSDsluCounter, 2614 mSDsCounter, 0 mSdLazyCounter, 2951 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3067 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 2963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:04,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3067 Valid, 5267 Invalid, 2963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2951 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-07-20 13:17:04,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6369 states. [2022-07-20 13:17:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6369 to 3450. [2022-07-20 13:17:04,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3450 states, 2592 states have (on average 1.8402777777777777) internal successors, (4770), 3425 states have internal predecessors, (4770), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:17:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 4820 transitions. [2022-07-20 13:17:04,562 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 4820 transitions. Word has length 36 [2022-07-20 13:17:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:04,562 INFO L495 AbstractCegarLoop]: Abstraction has 3450 states and 4820 transitions. [2022-07-20 13:17:04,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 4820 transitions. [2022-07-20 13:17:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 13:17:04,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:04,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:04,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-20 13:17:04,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:04,774 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:04,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:04,774 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2022-07-20 13:17:04,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:04,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194063201] [2022-07-20 13:17:04,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:04,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:04,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:04,777 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:04,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-20 13:17:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:05,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 13:17:05,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:05,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:17:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:05,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:05,088 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:05,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194063201] [2022-07-20 13:17:05,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194063201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:05,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:05,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:17:05,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399304334] [2022-07-20 13:17:05,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:05,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:17:05,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:05,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:17:05,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:17:05,090 INFO L87 Difference]: Start difference. First operand 3450 states and 4820 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:10,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:10,023 INFO L93 Difference]: Finished difference Result 7130 states and 9705 transitions. [2022-07-20 13:17:10,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 13:17:10,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 13:17:10,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:10,034 INFO L225 Difference]: With dead ends: 7130 [2022-07-20 13:17:10,034 INFO L226 Difference]: Without dead ends: 7130 [2022-07-20 13:17:10,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:10,035 INFO L413 NwaCegarLoop]: 2271 mSDtfsCounter, 4685 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 2965 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4695 SdHoareTripleChecker+Valid, 4597 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:10,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4695 Valid, 4597 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2965 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-07-20 13:17:10,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7130 states. [2022-07-20 13:17:10,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7130 to 3447. [2022-07-20 13:17:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 2592 states have (on average 1.8317901234567902) internal successors, (4748), 3422 states have internal predecessors, (4748), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:17:10,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 4798 transitions. [2022-07-20 13:17:10,102 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 4798 transitions. Word has length 36 [2022-07-20 13:17:10,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:10,102 INFO L495 AbstractCegarLoop]: Abstraction has 3447 states and 4798 transitions. [2022-07-20 13:17:10,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 4798 transitions. [2022-07-20 13:17:10,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 13:17:10,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:10,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:10,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:10,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:10,314 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:10,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:10,314 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2022-07-20 13:17:10,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:10,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993738925] [2022-07-20 13:17:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:10,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:10,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:10,317 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:10,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-20 13:17:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:10,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 13:17:10,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:10,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:17:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:10,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:10,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:10,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993738925] [2022-07-20 13:17:10,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993738925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:10,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:10,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:17:10,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209769124] [2022-07-20 13:17:10,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:10,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:17:10,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:10,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:17:10,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:17:10,683 INFO L87 Difference]: Start difference. First operand 3447 states and 4798 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:16,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:16,108 INFO L93 Difference]: Finished difference Result 5205 states and 6971 transitions. [2022-07-20 13:17:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 13:17:16,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 13:17:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:16,113 INFO L225 Difference]: With dead ends: 5205 [2022-07-20 13:17:16,113 INFO L226 Difference]: Without dead ends: 5205 [2022-07-20 13:17:16,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:16,114 INFO L413 NwaCegarLoop]: 2560 mSDtfsCounter, 2416 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 2623 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2416 SdHoareTripleChecker+Valid, 4747 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:16,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2416 Valid, 4747 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2623 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-07-20 13:17:16,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5205 states. [2022-07-20 13:17:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5205 to 3447. [2022-07-20 13:17:16,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 2592 states have (on average 1.8287037037037037) internal successors, (4740), 3422 states have internal predecessors, (4740), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:17:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 4790 transitions. [2022-07-20 13:17:16,158 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 4790 transitions. Word has length 36 [2022-07-20 13:17:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:16,159 INFO L495 AbstractCegarLoop]: Abstraction has 3447 states and 4790 transitions. [2022-07-20 13:17:16,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:16,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 4790 transitions. [2022-07-20 13:17:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 13:17:16,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:16,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:16,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-20 13:17:16,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:16,368 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:16,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2022-07-20 13:17:16,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:16,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408411787] [2022-07-20 13:17:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:16,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:16,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:16,370 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:16,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-20 13:17:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:16,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:17:16,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:16,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:16,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:16,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408411787] [2022-07-20 13:17:16,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408411787] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:16,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:16,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:17:16,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747085165] [2022-07-20 13:17:16,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:16,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:17:16,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:16,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:17:16,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:17:16,583 INFO L87 Difference]: Start difference. First operand 3447 states and 4790 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:16,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:16,645 INFO L93 Difference]: Finished difference Result 3435 states and 4766 transitions. [2022-07-20 13:17:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:17:16,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-20 13:17:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:16,650 INFO L225 Difference]: With dead ends: 3435 [2022-07-20 13:17:16,651 INFO L226 Difference]: Without dead ends: 3435 [2022-07-20 13:17:16,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:16,652 INFO L413 NwaCegarLoop]: 2007 mSDtfsCounter, 966 mSDsluCounter, 3035 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 5042 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:16,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 5042 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:17:16,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-07-20 13:17:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2022-07-20 13:17:16,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 2580 states have (on average 1.827906976744186) internal successors, (4716), 3410 states have internal predecessors, (4716), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 13:17:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4766 transitions. [2022-07-20 13:17:16,696 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4766 transitions. Word has length 40 [2022-07-20 13:17:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:16,696 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 4766 transitions. [2022-07-20 13:17:16,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4766 transitions. [2022-07-20 13:17:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 13:17:16,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:16,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:16,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:16,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:16,910 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:16,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:16,911 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2022-07-20 13:17:16,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:16,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492959720] [2022-07-20 13:17:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:16,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:16,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:16,913 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:16,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-20 13:17:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:17,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:17:17,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:17,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:17,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:17,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492959720] [2022-07-20 13:17:17,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492959720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:17,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:17,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:17:17,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967870838] [2022-07-20 13:17:17,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:17,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:17:17,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:17,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:17:17,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:17:17,306 INFO L87 Difference]: Start difference. First operand 3435 states and 4766 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:17,536 INFO L93 Difference]: Finished difference Result 5077 states and 6789 transitions. [2022-07-20 13:17:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:17:17,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-20 13:17:17,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:17,542 INFO L225 Difference]: With dead ends: 5077 [2022-07-20 13:17:17,542 INFO L226 Difference]: Without dead ends: 5077 [2022-07-20 13:17:17,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:17:17,542 INFO L413 NwaCegarLoop]: 2098 mSDtfsCounter, 1382 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 3952 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:17,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1391 Valid, 3952 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 13:17:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5077 states. [2022-07-20 13:17:17,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5077 to 4452. [2022-07-20 13:17:17,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4452 states, 3590 states have (on average 1.8147632311977715) internal successors, (6515), 4417 states have internal predecessors, (6515), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-20 13:17:17,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4452 states to 4452 states and 6585 transitions. [2022-07-20 13:17:17,599 INFO L78 Accepts]: Start accepts. Automaton has 4452 states and 6585 transitions. Word has length 48 [2022-07-20 13:17:17,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:17,599 INFO L495 AbstractCegarLoop]: Abstraction has 4452 states and 6585 transitions. [2022-07-20 13:17:17,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:17,599 INFO L276 IsEmpty]: Start isEmpty. Operand 4452 states and 6585 transitions. [2022-07-20 13:17:17,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 13:17:17,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:17,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:17,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:17,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:17,813 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:17,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:17,813 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2022-07-20 13:17:17,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:17,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214885364] [2022-07-20 13:17:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:17,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:17,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:17,815 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:17,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-20 13:17:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:18,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:17:18,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:18,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:18,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:18,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214885364] [2022-07-20 13:17:18,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214885364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:18,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:18,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:17:18,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32580839] [2022-07-20 13:17:18,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:18,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:17:18,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:17:18,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:17:18,080 INFO L87 Difference]: Start difference. First operand 4452 states and 6585 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:18,182 INFO L93 Difference]: Finished difference Result 5586 states and 7773 transitions. [2022-07-20 13:17:18,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:17:18,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-20 13:17:18,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:18,190 INFO L225 Difference]: With dead ends: 5586 [2022-07-20 13:17:18,191 INFO L226 Difference]: Without dead ends: 5586 [2022-07-20 13:17:18,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:18,191 INFO L413 NwaCegarLoop]: 3060 mSDtfsCounter, 1965 mSDsluCounter, 4357 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1975 SdHoareTripleChecker+Valid, 7417 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:18,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1975 Valid, 7417 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:17:18,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2022-07-20 13:17:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 4410. [2022-07-20 13:17:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4410 states, 3548 states have (on average 1.8165163472378805) internal successors, (6445), 4375 states have internal predecessors, (6445), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-20 13:17:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4410 states to 4410 states and 6515 transitions. [2022-07-20 13:17:18,246 INFO L78 Accepts]: Start accepts. Automaton has 4410 states and 6515 transitions. Word has length 51 [2022-07-20 13:17:18,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:18,247 INFO L495 AbstractCegarLoop]: Abstraction has 4410 states and 6515 transitions. [2022-07-20 13:17:18,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4410 states and 6515 transitions. [2022-07-20 13:17:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-20 13:17:18,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:18,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:18,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-07-20 13:17:18,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:18,459 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:18,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:18,460 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2022-07-20 13:17:18,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:18,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911871501] [2022-07-20 13:17:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:18,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:18,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:18,462 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) [2022-07-20 13:17:18,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-20 13:17:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:18,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:17:18,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:18,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:18,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:18,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911871501] [2022-07-20 13:17:18,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911871501] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:18,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:18,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:17:18,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857770214] [2022-07-20 13:17:18,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:18,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:17:18,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:18,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:17:18,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:17:18,833 INFO L87 Difference]: Start difference. First operand 4410 states and 6515 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:18,903 INFO L93 Difference]: Finished difference Result 5322 states and 7259 transitions. [2022-07-20 13:17:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:17:18,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-20 13:17:18,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:18,910 INFO L225 Difference]: With dead ends: 5322 [2022-07-20 13:17:18,910 INFO L226 Difference]: Without dead ends: 5322 [2022-07-20 13:17:18,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:18,912 INFO L413 NwaCegarLoop]: 3322 mSDtfsCounter, 1956 mSDsluCounter, 4668 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1966 SdHoareTripleChecker+Valid, 7990 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:18,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1966 Valid, 7990 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:17:18,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5322 states. [2022-07-20 13:17:19,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5322 to 4392. [2022-07-20 13:17:19,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4392 states, 3530 states have (on average 1.8172804532577904) internal successors, (6415), 4357 states have internal predecessors, (6415), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-20 13:17:19,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 6485 transitions. [2022-07-20 13:17:19,012 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 6485 transitions. Word has length 54 [2022-07-20 13:17:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:19,013 INFO L495 AbstractCegarLoop]: Abstraction has 4392 states and 6485 transitions. [2022-07-20 13:17:19,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 6485 transitions. [2022-07-20 13:17:19,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 13:17:19,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:19,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:19,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:19,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:19,227 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:19,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:19,227 INFO L85 PathProgramCache]: Analyzing trace with hash -665468730, now seen corresponding path program 1 times [2022-07-20 13:17:19,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:19,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449164898] [2022-07-20 13:17:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:19,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:19,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:19,230 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) [2022-07-20 13:17:19,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-20 13:17:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:19,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 13:17:19,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:19,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 13:17:19,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 13:17:19,534 INFO L356 Elim1Store]: treesize reduction 165, result has 13.6 percent of original size [2022-07-20 13:17:19,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 36 [2022-07-20 13:17:19,571 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-20 13:17:19,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 20 [2022-07-20 13:17:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:19,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:19,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:19,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449164898] [2022-07-20 13:17:19,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449164898] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:19,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:19,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:17:19,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914288869] [2022-07-20 13:17:19,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:19,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:17:19,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:19,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:17:19,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:17:19,594 INFO L87 Difference]: Start difference. First operand 4392 states and 6485 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:21,238 INFO L93 Difference]: Finished difference Result 4496 states and 6595 transitions. [2022-07-20 13:17:21,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:17:21,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-20 13:17:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:21,245 INFO L225 Difference]: With dead ends: 4496 [2022-07-20 13:17:21,245 INFO L226 Difference]: Without dead ends: 4496 [2022-07-20 13:17:21,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:21,246 INFO L413 NwaCegarLoop]: 1895 mSDtfsCounter, 907 mSDsluCounter, 2951 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 4846 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:21,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 4846 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 302 Invalid, 0 Unknown, 122 Unchecked, 1.6s Time] [2022-07-20 13:17:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4496 states. [2022-07-20 13:17:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4496 to 4358. [2022-07-20 13:17:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4358 states, 3496 states have (on average 1.8249427917620138) internal successors, (6380), 4323 states have internal predecessors, (6380), 35 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-20 13:17:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4358 states to 4358 states and 6450 transitions. [2022-07-20 13:17:21,320 INFO L78 Accepts]: Start accepts. Automaton has 4358 states and 6450 transitions. Word has length 57 [2022-07-20 13:17:21,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:21,321 INFO L495 AbstractCegarLoop]: Abstraction has 4358 states and 6450 transitions. [2022-07-20 13:17:21,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:21,321 INFO L276 IsEmpty]: Start isEmpty. Operand 4358 states and 6450 transitions. [2022-07-20 13:17:21,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 13:17:21,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:21,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:21,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:21,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:21,535 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:21,535 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2022-07-20 13:17:21,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:21,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735080742] [2022-07-20 13:17:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:21,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:21,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:21,538 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:21,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-20 13:17:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:21,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:17:21,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:22,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:22,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735080742] [2022-07-20 13:17:22,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735080742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:22,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:22,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:17:22,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29186516] [2022-07-20 13:17:22,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:22,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 13:17:22,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:22,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 13:17:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:17:22,043 INFO L87 Difference]: Start difference. First operand 4358 states and 6450 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:22,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:22,236 INFO L93 Difference]: Finished difference Result 5982 states and 8540 transitions. [2022-07-20 13:17:22,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 13:17:22,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-20 13:17:22,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:22,246 INFO L225 Difference]: With dead ends: 5982 [2022-07-20 13:17:22,246 INFO L226 Difference]: Without dead ends: 5982 [2022-07-20 13:17:22,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 13:17:22,247 INFO L413 NwaCegarLoop]: 2433 mSDtfsCounter, 1079 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 4315 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:22,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1087 Valid, 4315 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 13:17:22,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5982 states. [2022-07-20 13:17:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5982 to 5431. [2022-07-20 13:17:22,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5431 states, 4561 states have (on average 1.8013593510195132) internal successors, (8216), 5385 states have internal predecessors, (8216), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-20 13:17:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5431 states to 5431 states and 8308 transitions. [2022-07-20 13:17:22,349 INFO L78 Accepts]: Start accepts. Automaton has 5431 states and 8308 transitions. Word has length 59 [2022-07-20 13:17:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:22,350 INFO L495 AbstractCegarLoop]: Abstraction has 5431 states and 8308 transitions. [2022-07-20 13:17:22,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 5431 states and 8308 transitions. [2022-07-20 13:17:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 13:17:22,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:22,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:22,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:22,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:22,564 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:22,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2022-07-20 13:17:22,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:22,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065841639] [2022-07-20 13:17:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:22,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:22,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:22,567 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:22,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-20 13:17:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:23,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 13:17:23,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:23,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:17:23,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:17:23,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 13:17:23,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 13:17:23,405 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 13:17:23,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 13:17:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:23,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:23,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:23,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065841639] [2022-07-20 13:17:23,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065841639] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:23,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:23,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 13:17:23,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471128564] [2022-07-20 13:17:23,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:23,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:17:23,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:23,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:17:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:17:23,421 INFO L87 Difference]: Start difference. First operand 5431 states and 8308 transitions. Second operand has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:27,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:27,404 INFO L93 Difference]: Finished difference Result 7850 states and 12031 transitions. [2022-07-20 13:17:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:17:27,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-20 13:17:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:27,415 INFO L225 Difference]: With dead ends: 7850 [2022-07-20 13:17:27,415 INFO L226 Difference]: Without dead ends: 7850 [2022-07-20 13:17:27,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:17:27,416 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 4067 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4081 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:27,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4081 Valid, 1363 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-07-20 13:17:27,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7850 states. [2022-07-20 13:17:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7850 to 5191. [2022-07-20 13:17:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5191 states, 4405 states have (on average 1.7332576617480135) internal successors, (7635), 5145 states have internal predecessors, (7635), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-20 13:17:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5191 states to 5191 states and 7727 transitions. [2022-07-20 13:17:27,503 INFO L78 Accepts]: Start accepts. Automaton has 5191 states and 7727 transitions. Word has length 62 [2022-07-20 13:17:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:27,504 INFO L495 AbstractCegarLoop]: Abstraction has 5191 states and 7727 transitions. [2022-07-20 13:17:27,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 5191 states and 7727 transitions. [2022-07-20 13:17:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 13:17:27,505 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:27,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:27,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:27,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:27,719 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:27,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391416, now seen corresponding path program 1 times [2022-07-20 13:17:27,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:27,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400799772] [2022-07-20 13:17:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:27,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:27,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:27,722 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:27,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-20 13:17:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:28,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 13:17:28,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:28,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:17:28,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 13:17:28,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-20 13:17:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:28,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:28,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:28,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400799772] [2022-07-20 13:17:28,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400799772] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:28,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:28,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:17:28,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472332821] [2022-07-20 13:17:28,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:28,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 13:17:28,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:28,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 13:17:28,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:28,081 INFO L87 Difference]: Start difference. First operand 5191 states and 7727 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:31,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:31,516 INFO L93 Difference]: Finished difference Result 5190 states and 7724 transitions. [2022-07-20 13:17:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 13:17:31,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-20 13:17:31,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:31,521 INFO L225 Difference]: With dead ends: 5190 [2022-07-20 13:17:31,522 INFO L226 Difference]: Without dead ends: 5190 [2022-07-20 13:17:31,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 13:17:31,522 INFO L413 NwaCegarLoop]: 1926 mSDtfsCounter, 4 mSDsluCounter, 3188 mSDsCounter, 0 mSdLazyCounter, 2595 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5114 SdHoareTripleChecker+Invalid, 2596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:31,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 5114 Invalid, 2596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2595 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-20 13:17:31,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2022-07-20 13:17:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 5190. [2022-07-20 13:17:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5190 states, 4405 states have (on average 1.7325766174801362) internal successors, (7632), 5144 states have internal predecessors, (7632), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-20 13:17:31,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5190 states to 5190 states and 7724 transitions. [2022-07-20 13:17:31,569 INFO L78 Accepts]: Start accepts. Automaton has 5190 states and 7724 transitions. Word has length 67 [2022-07-20 13:17:31,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:31,569 INFO L495 AbstractCegarLoop]: Abstraction has 5190 states and 7724 transitions. [2022-07-20 13:17:31,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 5190 states and 7724 transitions. [2022-07-20 13:17:31,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 13:17:31,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:31,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:31,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:31,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:31,784 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:31,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:31,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391415, now seen corresponding path program 1 times [2022-07-20 13:17:31,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:31,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550184439] [2022-07-20 13:17:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:31,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:31,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:31,787 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:31,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-20 13:17:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:32,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 13:17:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:32,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:17:32,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 13:17:32,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 13:17:32,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-20 13:17:32,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 13:17:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:32,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:32,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:32,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550184439] [2022-07-20 13:17:32,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550184439] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:32,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:32,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:17:32,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920920121] [2022-07-20 13:17:32,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:32,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 13:17:32,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:32,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 13:17:32,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:32,177 INFO L87 Difference]: Start difference. First operand 5190 states and 7724 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:36,968 INFO L93 Difference]: Finished difference Result 5189 states and 7721 transitions. [2022-07-20 13:17:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 13:17:36,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-20 13:17:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:36,978 INFO L225 Difference]: With dead ends: 5189 [2022-07-20 13:17:36,978 INFO L226 Difference]: Without dead ends: 5189 [2022-07-20 13:17:36,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 13:17:36,979 INFO L413 NwaCegarLoop]: 1926 mSDtfsCounter, 2 mSDsluCounter, 3177 mSDsCounter, 0 mSdLazyCounter, 2604 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5103 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:36,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5103 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2604 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-07-20 13:17:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5189 states. [2022-07-20 13:17:37,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5189 to 5189. [2022-07-20 13:17:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5189 states, 4402 states have (on average 1.7330758746024535) internal successors, (7629), 5143 states have internal predecessors, (7629), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-20 13:17:37,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 7721 transitions. [2022-07-20 13:17:37,037 INFO L78 Accepts]: Start accepts. Automaton has 5189 states and 7721 transitions. Word has length 67 [2022-07-20 13:17:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:37,038 INFO L495 AbstractCegarLoop]: Abstraction has 5189 states and 7721 transitions. [2022-07-20 13:17:37,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 5189 states and 7721 transitions. [2022-07-20 13:17:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 13:17:37,039 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:37,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:37,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:37,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:37,243 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr396REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:37,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:37,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564532, now seen corresponding path program 1 times [2022-07-20 13:17:37,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:37,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711566289] [2022-07-20 13:17:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:37,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:37,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:37,246 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:37,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-20 13:17:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:37,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 13:17:37,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:37,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:17:37,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 13:17:37,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-20 13:17:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:37,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:37,623 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:37,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711566289] [2022-07-20 13:17:37,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711566289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:37,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:37,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:17:37,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561519241] [2022-07-20 13:17:37,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:37,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 13:17:37,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:37,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 13:17:37,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:37,624 INFO L87 Difference]: Start difference. First operand 5189 states and 7721 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:40,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:40,888 INFO L93 Difference]: Finished difference Result 5188 states and 7717 transitions. [2022-07-20 13:17:40,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 13:17:40,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-20 13:17:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:40,894 INFO L225 Difference]: With dead ends: 5188 [2022-07-20 13:17:40,894 INFO L226 Difference]: Without dead ends: 5188 [2022-07-20 13:17:40,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 13:17:40,895 INFO L413 NwaCegarLoop]: 1924 mSDtfsCounter, 4 mSDsluCounter, 3185 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5109 SdHoareTripleChecker+Invalid, 2593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:40,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 5109 Invalid, 2593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-20 13:17:40,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5188 states. [2022-07-20 13:17:40,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5188 to 5188. [2022-07-20 13:17:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5188 states, 4402 states have (on average 1.7321671967287597) internal successors, (7625), 5142 states have internal predecessors, (7625), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-20 13:17:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 7717 transitions. [2022-07-20 13:17:40,949 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 7717 transitions. Word has length 67 [2022-07-20 13:17:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:40,950 INFO L495 AbstractCegarLoop]: Abstraction has 5188 states and 7717 transitions. [2022-07-20 13:17:40,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 7717 transitions. [2022-07-20 13:17:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 13:17:40,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:40,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:40,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:41,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:41,164 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr397REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:41,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564533, now seen corresponding path program 1 times [2022-07-20 13:17:41,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:41,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274655971] [2022-07-20 13:17:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:41,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:41,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:41,167 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:41,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-20 13:17:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:41,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 13:17:41,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:41,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:17:41,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 13:17:41,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 13:17:41,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-20 13:17:41,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 13:17:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:41,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:41,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:41,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274655971] [2022-07-20 13:17:41,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274655971] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:41,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:41,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:17:41,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94915579] [2022-07-20 13:17:41,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:41,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 13:17:41,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:41,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 13:17:41,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:41,558 INFO L87 Difference]: Start difference. First operand 5188 states and 7717 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:45,921 INFO L93 Difference]: Finished difference Result 5187 states and 7713 transitions. [2022-07-20 13:17:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 13:17:45,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-20 13:17:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:45,927 INFO L225 Difference]: With dead ends: 5187 [2022-07-20 13:17:45,928 INFO L226 Difference]: Without dead ends: 5187 [2022-07-20 13:17:45,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 13:17:45,928 INFO L413 NwaCegarLoop]: 1924 mSDtfsCounter, 2 mSDsluCounter, 3174 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5098 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:45,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5098 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2601 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 13:17:45,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5187 states. [2022-07-20 13:17:45,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5187 to 5187. [2022-07-20 13:17:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5187 states, 4398 states have (on average 1.7328331059572533) internal successors, (7621), 5141 states have internal predecessors, (7621), 46 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-20 13:17:45,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5187 states to 5187 states and 7713 transitions. [2022-07-20 13:17:45,979 INFO L78 Accepts]: Start accepts. Automaton has 5187 states and 7713 transitions. Word has length 67 [2022-07-20 13:17:45,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:45,980 INFO L495 AbstractCegarLoop]: Abstraction has 5187 states and 7713 transitions. [2022-07-20 13:17:45,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 13:17:45,980 INFO L276 IsEmpty]: Start isEmpty. Operand 5187 states and 7713 transitions. [2022-07-20 13:17:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 13:17:45,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:45,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:45,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:46,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:46,189 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:46,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1448028751, now seen corresponding path program 1 times [2022-07-20 13:17:46,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:46,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929079551] [2022-07-20 13:17:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:46,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:46,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:46,191 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:46,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-20 13:17:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:46,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 13:17:46,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:46,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 13:17:46,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:46,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929079551] [2022-07-20 13:17:46,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929079551] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 13:17:46,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 13:17:46,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 13:17:46,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58961573] [2022-07-20 13:17:46,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 13:17:46,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 13:17:46,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:46,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 13:17:46,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 13:17:46,613 INFO L87 Difference]: Start difference. First operand 5187 states and 7713 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 13:17:46,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:46,666 INFO L93 Difference]: Finished difference Result 5190 states and 7722 transitions. [2022-07-20 13:17:46,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 13:17:46,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-07-20 13:17:46,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:46,678 INFO L225 Difference]: With dead ends: 5190 [2022-07-20 13:17:46,678 INFO L226 Difference]: Without dead ends: 5190 [2022-07-20 13:17:46,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 13:17:46,679 INFO L413 NwaCegarLoop]: 1923 mSDtfsCounter, 2 mSDsluCounter, 3838 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5761 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:46,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5761 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 13:17:46,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2022-07-20 13:17:46,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 5190. [2022-07-20 13:17:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5190 states, 4400 states have (on average 1.7327272727272727) internal successors, (7624), 5144 states have internal predecessors, (7624), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-20 13:17:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5190 states to 5190 states and 7722 transitions. [2022-07-20 13:17:46,747 INFO L78 Accepts]: Start accepts. Automaton has 5190 states and 7722 transitions. Word has length 75 [2022-07-20 13:17:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:46,747 INFO L495 AbstractCegarLoop]: Abstraction has 5190 states and 7722 transitions. [2022-07-20 13:17:46,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 13:17:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 5190 states and 7722 transitions. [2022-07-20 13:17:46,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 13:17:46,748 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:46,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:46,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:46,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:46,954 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:46,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1074294312, now seen corresponding path program 1 times [2022-07-20 13:17:46,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:46,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188286424] [2022-07-20 13:17:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:17:46,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:46,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:46,956 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:46,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-20 13:17:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:17:47,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 13:17:47,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:47,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 13:17:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:47,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:47,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188286424] [2022-07-20 13:17:47,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188286424] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 13:17:47,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 13:17:47,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-20 13:17:47,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189181820] [2022-07-20 13:17:47,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 13:17:47,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 13:17:47,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 13:17:47,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 13:17:47,417 INFO L87 Difference]: Start difference. First operand 5190 states and 7722 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 13:17:47,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:47,625 INFO L93 Difference]: Finished difference Result 5202 states and 7744 transitions. [2022-07-20 13:17:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 13:17:47,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 76 [2022-07-20 13:17:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:47,639 INFO L225 Difference]: With dead ends: 5202 [2022-07-20 13:17:47,639 INFO L226 Difference]: Without dead ends: 5202 [2022-07-20 13:17:47,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-07-20 13:17:47,641 INFO L413 NwaCegarLoop]: 1923 mSDtfsCounter, 16 mSDsluCounter, 5754 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 7677 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:47,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 7677 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 13:17:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5202 states. [2022-07-20 13:17:47,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5202 to 5200. [2022-07-20 13:17:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5200 states, 4409 states have (on average 1.732592424586074) internal successors, (7639), 5153 states have internal predecessors, (7639), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-20 13:17:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 7737 transitions. [2022-07-20 13:17:47,704 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 7737 transitions. Word has length 76 [2022-07-20 13:17:47,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:47,704 INFO L495 AbstractCegarLoop]: Abstraction has 5200 states and 7737 transitions. [2022-07-20 13:17:47,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 13:17:47,705 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 7737 transitions. [2022-07-20 13:17:47,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-20 13:17:47,706 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:47,706 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:47,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:47,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:47,920 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:47,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:47,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1670522737, now seen corresponding path program 2 times [2022-07-20 13:17:47,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:47,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596090382] [2022-07-20 13:17:47,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 13:17:47,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:47,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:47,922 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:47,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-20 13:17:48,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 13:17:48,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 13:17:48,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 13:17:48,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:48,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 13:17:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:48,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:48,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596090382] [2022-07-20 13:17:48,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596090382] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 13:17:48,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 13:17:48,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-20 13:17:48,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486908735] [2022-07-20 13:17:48,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 13:17:48,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 13:17:48,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:48,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 13:17:48,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-20 13:17:48,772 INFO L87 Difference]: Start difference. First operand 5200 states and 7737 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 13:17:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:49,380 INFO L93 Difference]: Finished difference Result 5221 states and 7785 transitions. [2022-07-20 13:17:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 13:17:49,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 79 [2022-07-20 13:17:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:49,411 INFO L225 Difference]: With dead ends: 5221 [2022-07-20 13:17:49,411 INFO L226 Difference]: Without dead ends: 5217 [2022-07-20 13:17:49,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2022-07-20 13:17:49,412 INFO L413 NwaCegarLoop]: 1926 mSDtfsCounter, 64 mSDsluCounter, 9608 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 11534 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:49,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 11534 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 13:17:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5217 states. [2022-07-20 13:17:49,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5217 to 5209. [2022-07-20 13:17:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5209 states, 4418 states have (on average 1.7317790855590764) internal successors, (7651), 5162 states have internal predecessors, (7651), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-20 13:17:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5209 states to 5209 states and 7749 transitions. [2022-07-20 13:17:49,475 INFO L78 Accepts]: Start accepts. Automaton has 5209 states and 7749 transitions. Word has length 79 [2022-07-20 13:17:49,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:49,475 INFO L495 AbstractCegarLoop]: Abstraction has 5209 states and 7749 transitions. [2022-07-20 13:17:49,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 13:17:49,476 INFO L276 IsEmpty]: Start isEmpty. Operand 5209 states and 7749 transitions. [2022-07-20 13:17:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-20 13:17:49,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:49,477 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:49,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:49,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:49,693 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:49,694 INFO L85 PathProgramCache]: Analyzing trace with hash 873906671, now seen corresponding path program 3 times [2022-07-20 13:17:49,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:49,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242062733] [2022-07-20 13:17:49,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 13:17:49,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:49,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:49,696 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:49,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-20 13:17:50,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-20 13:17:50,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 13:17:50,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 13:17:50,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:50,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 13:17:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:51,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:51,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242062733] [2022-07-20 13:17:51,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242062733] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 13:17:51,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 13:17:51,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-20 13:17:51,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777063432] [2022-07-20 13:17:51,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 13:17:51,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 13:17:51,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:51,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 13:17:51,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-07-20 13:17:51,223 INFO L87 Difference]: Start difference. First operand 5209 states and 7749 transitions. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 13:17:54,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:17:54,177 INFO L93 Difference]: Finished difference Result 5251 states and 7886 transitions. [2022-07-20 13:17:54,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-20 13:17:54,178 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 85 [2022-07-20 13:17:54,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:17:54,188 INFO L225 Difference]: With dead ends: 5251 [2022-07-20 13:17:54,188 INFO L226 Difference]: Without dead ends: 5245 [2022-07-20 13:17:54,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=793, Invalid=1559, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 13:17:54,190 INFO L413 NwaCegarLoop]: 1930 mSDtfsCounter, 192 mSDsluCounter, 21173 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 23103 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 13:17:54,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 23103 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-20 13:17:54,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5245 states. [2022-07-20 13:17:54,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 5227. [2022-07-20 13:17:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5227 states, 4436 states have (on average 1.729936880072137) internal successors, (7674), 5180 states have internal predecessors, (7674), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-20 13:17:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5227 states to 5227 states and 7772 transitions. [2022-07-20 13:17:54,254 INFO L78 Accepts]: Start accepts. Automaton has 5227 states and 7772 transitions. Word has length 85 [2022-07-20 13:17:54,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:17:54,254 INFO L495 AbstractCegarLoop]: Abstraction has 5227 states and 7772 transitions. [2022-07-20 13:17:54,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 13:17:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 5227 states and 7772 transitions. [2022-07-20 13:17:54,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-20 13:17:54,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:17:54,256 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:17:54,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-20 13:17:54,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:17:54,471 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:17:54,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:17:54,472 INFO L85 PathProgramCache]: Analyzing trace with hash -575079249, now seen corresponding path program 4 times [2022-07-20 13:17:54,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:17:54,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343572618] [2022-07-20 13:17:54,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 13:17:54,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:17:54,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:17:54,474 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:17:54,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-20 13:17:54,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 13:17:54,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 13:17:54,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 13:17:54,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:17:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:55,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 13:17:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 13:17:56,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:17:56,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343572618] [2022-07-20 13:17:56,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343572618] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 13:17:56,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 13:17:56,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-20 13:17:56,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090652007] [2022-07-20 13:17:56,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 13:17:56,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 13:17:56,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:17:56,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 13:17:56,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 13:17:56,595 INFO L87 Difference]: Start difference. First operand 5227 states and 7772 transitions. Second operand has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 13:18:07,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:18:07,818 INFO L93 Difference]: Finished difference Result 5307 states and 7989 transitions. [2022-07-20 13:18:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-20 13:18:07,820 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 97 [2022-07-20 13:18:07,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:18:07,830 INFO L225 Difference]: With dead ends: 5307 [2022-07-20 13:18:07,831 INFO L226 Difference]: Without dead ends: 5303 [2022-07-20 13:18:07,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3791, Invalid=9319, Unknown=0, NotChecked=0, Total=13110 [2022-07-20 13:18:07,834 INFO L413 NwaCegarLoop]: 1943 mSDtfsCounter, 376 mSDsluCounter, 46494 mSDsCounter, 0 mSdLazyCounter, 3088 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 48437 SdHoareTripleChecker+Invalid, 3504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 3088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 13:18:07,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 48437 Invalid, 3504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 3088 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 13:18:07,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5303 states. [2022-07-20 13:18:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5303 to 5261. [2022-07-20 13:18:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 4470 states have (on average 1.7270693512304252) internal successors, (7720), 5214 states have internal predecessors, (7720), 46 states have call successors, (46), 4 states have call predecessors, (46), 5 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-20 13:18:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7818 transitions. [2022-07-20 13:18:07,902 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7818 transitions. Word has length 97 [2022-07-20 13:18:07,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:18:07,902 INFO L495 AbstractCegarLoop]: Abstraction has 5261 states and 7818 transitions. [2022-07-20 13:18:07,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 13:18:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7818 transitions. [2022-07-20 13:18:07,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-20 13:18:07,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:18:07,904 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:18:07,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-20 13:18:08,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:18:08,118 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:18:08,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:18:08,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2102212849, now seen corresponding path program 5 times [2022-07-20 13:18:08,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:18:08,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891637719] [2022-07-20 13:18:08,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 13:18:08,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:18:08,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:18:08,122 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:18:08,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-20 13:18:09,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-20 13:18:09,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 13:18:09,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-20 13:18:09,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:18:09,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:18:09,608 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 13:18:09,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-20 13:18:09,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 13:18:09,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-20 13:18:11,043 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 13:18:11,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-20 13:18:11,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-20 13:18:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-20 13:18:11,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 13:18:11,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:18:11,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891637719] [2022-07-20 13:18:11,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891637719] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 13:18:11,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1393420155] [2022-07-20 13:18:11,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 13:18:11,332 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 13:18:11,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 13:18:11,334 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 13:18:11,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-07-20 13:19:35,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-20 13:19:35,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 13:19:36,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-20 13:19:36,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:19:36,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:19:36,286 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 13:19:36,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-20 13:19:36,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 13:19:36,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-20 13:19:37,667 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 13:19:37,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-20 13:19:37,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-20 13:19:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-07-20 13:19:37,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 13:19:37,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1393420155] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 13:19:37,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 13:19:37,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-20 13:19:37,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629837939] [2022-07-20 13:19:37,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 13:19:37,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 13:19:37,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 13:19:37,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 13:19:37,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=92, Unknown=11, NotChecked=0, Total=132 [2022-07-20 13:19:37,943 INFO L87 Difference]: Start difference. First operand 5261 states and 7818 transitions. Second operand has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 13:19:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 13:19:42,329 INFO L93 Difference]: Finished difference Result 7816 states and 11874 transitions. [2022-07-20 13:19:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 13:19:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-07-20 13:19:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 13:19:42,346 INFO L225 Difference]: With dead ends: 7816 [2022-07-20 13:19:42,347 INFO L226 Difference]: Without dead ends: 7812 [2022-07-20 13:19:42,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 140 SyntacticMatches, 94 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=42, Invalid=127, Unknown=13, NotChecked=0, Total=182 [2022-07-20 13:19:42,347 INFO L413 NwaCegarLoop]: 1183 mSDtfsCounter, 1592 mSDsluCounter, 5197 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1601 SdHoareTripleChecker+Valid, 6380 SdHoareTripleChecker+Invalid, 7187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4491 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-20 13:19:42,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1601 Valid, 6380 Invalid, 7187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2684 Invalid, 0 Unknown, 4491 Unchecked, 4.2s Time] [2022-07-20 13:19:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7812 states. [2022-07-20 13:19:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7812 to 5309. [2022-07-20 13:19:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5309 states, 4518 states have (on average 1.7189021691013724) internal successors, (7766), 5261 states have internal predecessors, (7766), 46 states have call successors, (46), 5 states have call predecessors, (46), 6 states have return successors, (52), 43 states have call predecessors, (52), 46 states have call successors, (52) [2022-07-20 13:19:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5309 states to 5309 states and 7864 transitions. [2022-07-20 13:19:42,428 INFO L78 Accepts]: Start accepts. Automaton has 5309 states and 7864 transitions. Word has length 119 [2022-07-20 13:19:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 13:19:42,429 INFO L495 AbstractCegarLoop]: Abstraction has 5309 states and 7864 transitions. [2022-07-20 13:19:42,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.714285714285714) internal successors, (75), 9 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 13:19:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5309 states and 7864 transitions. [2022-07-20 13:19:42,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-20 13:19:42,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 13:19:42,431 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 13:19:42,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2022-07-20 13:19:42,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-20 13:19:42,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 13:19:42,849 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 1092 more)] === [2022-07-20 13:19:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 13:19:42,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2102212848, now seen corresponding path program 1 times [2022-07-20 13:19:42,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 13:19:42,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477670673] [2022-07-20 13:19:42,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:19:42,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 13:19:42,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 13:19:42,851 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 13:19:42,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-20 13:19:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 13:19:43,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-20 13:19:43,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 13:19:43,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:19:43,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 13:19:43,819 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 13:19:43,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 13:19:43,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 13:19:43,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 13:19:43,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-20 13:19:43,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-20 13:19:44,002 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3552 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3552))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3551 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3551) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-20 13:19:44,014 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3553 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3553))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3554 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3554) |c_#memory_$Pointer$.base|))) is different from true [2022-07-20 13:19:44,025 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3555 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3555))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3556 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3556) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-20 13:19:44,036 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3558 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3558))) (exists ((v_ArrVal_3557 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3557)))) is different from true [2022-07-20 13:19:44,089 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3562 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3562) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3561 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3561)))) is different from true [2022-07-20 13:19:44,100 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3564 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3564) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3563 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3563) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-20 13:19:44,171 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3570 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3570))) (exists ((v_ArrVal_3569 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3569)))) is different from true [2022-07-20 13:19:44,225 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3575 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3575) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3576 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3576)))) is different from true [2022-07-20 13:19:44,265 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3579 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3579))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3580 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3580) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-20 13:19:44,302 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3583 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3583))) (exists ((v_ArrVal_3584 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3584)))) is different from true [2022-07-20 13:19:44,344 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3588 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3588))) (exists ((v_ArrVal_3587 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3587) |c_#memory_$Pointer$.offset|))) is different from true [2022-07-20 13:19:44,355 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3590 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3590))) (exists ((v_ArrVal_3589 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3589) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29)))) is different from true [2022-07-20 13:19:44,364 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3591 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3591))) (exists ((v_ArrVal_3592 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3592)))) is different from true [2022-07-20 13:19:44,421 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3597 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3597))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3598 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3598)))) is different from true [2022-07-20 13:19:44,440 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3599 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3599))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3600 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3600) |c_#memory_$Pointer$.base|))) is different from true [2022-07-20 13:19:44,452 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3602 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3602) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3601 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3601) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29)))) is different from true [2022-07-20 13:19:44,511 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3607 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3607))) (exists ((v_ArrVal_3608 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3608) |c_#memory_$Pointer$.base|))) is different from true [2022-07-20 13:19:44,519 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3609 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3609) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3610 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3610)))) is different from true [2022-07-20 13:19:44,535 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3611 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3611))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3612 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3612)))) is different from true [2022-07-20 13:19:44,576 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3615 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3615) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3616 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3616)))) is different from true [2022-07-20 13:19:44,616 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3620 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3620))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3619 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3619) |c_#memory_$Pointer$.base|))) is different from true [2022-07-20 13:19:44,628 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3621 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3621))) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3622 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3622)))) is different from true [2022-07-20 13:19:44,639 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3624 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3624))) (exists ((v_ArrVal_3623 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3623)))) is different from true [2022-07-20 13:19:44,682 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3628 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3628) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3627 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3627)))) is different from true [2022-07-20 13:19:44,723 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3631 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3631) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3632 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3632)))) is different from true [2022-07-20 13:19:44,765 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3636 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3636))) (exists ((v_ArrVal_3635 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3635) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29)))) is different from true [2022-07-20 13:19:44,776 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_29 (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| v_arrayElimCell_29))) (exists ((v_ArrVal_3637 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3637))) (exists ((v_ArrVal_3638 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_3638)))) is different from true [2022-07-20 13:19:44,818 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 13:19:44,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-07-20 13:19:44,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-20 13:19:44,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-07-20 13:19:44,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 13:19:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 136 trivial. 837 not checked. [2022-07-20 13:19:44,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 13:19:45,717 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3730 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3730) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv16 32) .cse0) (bvadd .cse0 (_ bv20 32))))) (forall ((v_ArrVal_3730 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3729 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3730) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_3729) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) is different from false [2022-07-20 13:19:45,725 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 13:19:45,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477670673] [2022-07-20 13:19:45,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477670673] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 13:19:45,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1806261763] [2022-07-20 13:19:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 13:19:45,726 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 13:19:45,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 13:19:45,727 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 13:19:45,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process