./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.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 4aba0d481dbad425b1cb3ce4949768f5bfa91a070fed6a0c2b192c70ad920fc2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:26:18,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:26:18,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:26:18,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:26:18,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:26:18,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:26:18,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:26:18,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:26:18,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:26:18,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:26:18,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:26:18,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:26:18,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:26:18,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:26:18,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:26:18,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:26:18,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:26:18,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:26:18,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:26:18,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:26:18,793 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:26:18,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:26:18,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:26:18,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:26:18,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:26:18,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:26:18,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:26:18,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:26:18,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:26:18,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:26:18,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:26:18,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:26:18,805 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:26:18,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:26:18,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:26:18,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:26:18,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:26:18,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:26:18,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:26:18,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:26:18,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:26:18,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:26:18,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 06:26:18,834 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:26:18,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:26:18,835 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:26:18,835 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:26:18,836 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:26:18,836 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:26:18,836 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:26:18,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:26:18,837 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:26:18,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:26:18,838 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:26:18,838 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:26:18,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:26:18,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:26:18,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:26:18,838 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:26:18,838 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:26:18,839 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:26:18,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:26:18,839 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:26:18,839 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:26:18,839 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:26:18,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:26:18,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:26:18,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:26:18,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:26:18,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:26:18,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:26:18,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 06:26:18,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 06:26:18,841 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4aba0d481dbad425b1cb3ce4949768f5bfa91a070fed6a0c2b192c70ad920fc2 [2022-07-23 06:26:19,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:26:19,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:26:19,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:26:19,083 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:26:19,083 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:26:19,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i [2022-07-23 06:26:19,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c24e818f/78eaecaf213041e1a74d58ecaa548eae/FLAG6288d0bfa [2022-07-23 06:26:19,634 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:26:19,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i [2022-07-23 06:26:19,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c24e818f/78eaecaf213041e1a74d58ecaa548eae/FLAG6288d0bfa [2022-07-23 06:26:19,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c24e818f/78eaecaf213041e1a74d58ecaa548eae [2022-07-23 06:26:19,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:26:19,961 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:26:19,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:26:19,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:26:19,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:26:19,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:26:19" (1/1) ... [2022-07-23 06:26:19,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7898580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:19, skipping insertion in model container [2022-07-23 06:26:19,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:26:19" (1/1) ... [2022-07-23 06:26:19,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:26:20,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:26:20,190 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/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i[472,485] [2022-07-23 06:26:20,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:26:20,838 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) [2022-07-23 06:26:20,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@a4979d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:20, skipping insertion in model container [2022-07-23 06:26:20,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:26:20,839 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-23 06:26:20,841 INFO L158 Benchmark]: Toolchain (without parser) took 879.25ms. Allocated memory is still 136.3MB. Free memory was 91.4MB in the beginning and 79.7MB in the end (delta: 11.7MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. [2022-07-23 06:26:20,841 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 136.3MB. Free memory is still 112.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 06:26:20,841 INFO L158 Benchmark]: CACSL2BoogieTranslator took 876.62ms. Allocated memory is still 136.3MB. Free memory was 91.2MB in the beginning and 79.7MB in the end (delta: 11.5MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. [2022-07-23 06:26:20,842 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 136.3MB. Free memory is still 112.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 876.62ms. Allocated memory is still 136.3MB. Free memory was 91.2MB in the beginning and 79.7MB in the end (delta: 11.5MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2977]: 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/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.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 4aba0d481dbad425b1cb3ce4949768f5bfa91a070fed6a0c2b192c70ad920fc2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:26:22,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:26:22,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:26:22,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:26:22,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:26:22,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:26:22,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:26:22,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:26:22,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:26:22,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:26:22,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:26:22,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:26:22,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:26:22,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:26:22,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:26:22,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:26:22,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:26:22,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:26:22,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:26:22,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:26:22,813 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:26:22,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:26:22,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:26:22,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:26:22,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:26:22,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:26:22,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:26:22,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:26:22,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:26:22,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:26:22,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:26:22,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:26:22,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:26:22,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:26:22,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:26:22,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:26:22,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:26:22,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:26:22,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:26:22,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:26:22,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:26:22,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:26:22,833 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 06:26:22,856 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:26:22,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:26:22,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:26:22,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:26:22,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:26:22,858 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:26:22,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:26:22,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:26:22,859 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:26:22,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:26:22,860 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:26:22,860 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:26:22,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:26:22,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:26:22,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:26:22,861 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:26:22,861 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:26:22,861 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:26:22,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:26:22,861 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:26:22,861 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 06:26:22,862 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 06:26:22,862 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:26:22,862 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:26:22,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:26:22,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:26:22,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:26:22,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:26:22,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:26:22,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:26:22,863 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 06:26:22,863 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 06:26:22,863 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 06:26:22,864 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4aba0d481dbad425b1cb3ce4949768f5bfa91a070fed6a0c2b192c70ad920fc2 [2022-07-23 06:26:23,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:26:23,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:26:23,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:26:23,131 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:26:23,131 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:26:23,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i [2022-07-23 06:26:23,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77673299d/751cef84ee6e4c47a3ba98f1d2e00c43/FLAG2a3d512a1 [2022-07-23 06:26:23,725 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:26:23,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i [2022-07-23 06:26:23,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77673299d/751cef84ee6e4c47a3ba98f1d2e00c43/FLAG2a3d512a1 [2022-07-23 06:26:24,228 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77673299d/751cef84ee6e4c47a3ba98f1d2e00c43 [2022-07-23 06:26:24,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:26:24,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:26:24,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:26:24,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:26:24,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:26:24,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:26:24" (1/1) ... [2022-07-23 06:26:24,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6987a35f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:24, skipping insertion in model container [2022-07-23 06:26:24,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:26:24" (1/1) ... [2022-07-23 06:26:24,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:26:24,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:26:24,452 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/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i[472,485] [2022-07-23 06:26:25,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:26:25,404 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-23 06:26:25,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:26:25,420 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/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i[472,485] [2022-07-23 06:26:25,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:26:25,556 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 06:26:25,563 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/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i[472,485] [2022-07-23 06:26:25,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:26:25,759 INFO L208 MainTranslator]: Completed translation [2022-07-23 06:26:25,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:25 WrapperNode [2022-07-23 06:26:25,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:26:25,761 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 06:26:25,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 06:26:25,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 06:26:25,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:25" (1/1) ... [2022-07-23 06:26:25,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:25" (1/1) ... [2022-07-23 06:26:25,892 INFO L137 Inliner]: procedures = 482, calls = 840, calls flagged for inlining = 54, calls inlined = 37, statements flattened = 970 [2022-07-23 06:26:25,892 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 06:26:25,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 06:26:25,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 06:26:25,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 06:26:25,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:25" (1/1) ... [2022-07-23 06:26:25,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:25" (1/1) ... [2022-07-23 06:26:25,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:25" (1/1) ... [2022-07-23 06:26:25,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:25" (1/1) ... [2022-07-23 06:26:25,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:25" (1/1) ... [2022-07-23 06:26:25,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:25" (1/1) ... [2022-07-23 06:26:25,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:25" (1/1) ... [2022-07-23 06:26:25,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 06:26:25,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 06:26:25,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 06:26:25,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 06:26:25,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:25" (1/1) ... [2022-07-23 06:26:26,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:26:26,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:26:26,053 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) [2022-07-23 06:26:26,093 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 [2022-07-23 06:26:26,106 INFO L130 BoogieDeclarations]: Found specification of procedure zf_timer_off [2022-07-23 06:26:26,106 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_timer_off [2022-07-23 06:26:26,106 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2022-07-23 06:26:26,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2022-07-23 06:26:26,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-23 06:26:26,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_begin [2022-07-23 06:26:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-07-23 06:26:26,107 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-07-23 06:26:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 06:26:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-07-23 06:26:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-23 06:26:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-07-23 06:26:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-07-23 06:26:26,107 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-07-23 06:26:26,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-23 06:26:26,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_end [2022-07-23 06:26:26,108 INFO L130 BoogieDeclarations]: Found specification of procedure zf_get_control [2022-07-23 06:26:26,108 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_get_control [2022-07-23 06:26:26,108 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2022-07-23 06:26:26,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2022-07-23 06:26:26,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 06:26:26,108 INFO L130 BoogieDeclarations]: Found specification of procedure request_region [2022-07-23 06:26:26,108 INFO L138 BoogieDeclarations]: Found implementation of procedure request_region [2022-07-23 06:26:26,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 06:26:26,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 06:26:26,109 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-07-23 06:26:26,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-07-23 06:26:26,109 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irqsave [2022-07-23 06:26:26,109 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irqsave [2022-07-23 06:26:26,110 INFO L130 BoogieDeclarations]: Found specification of procedure release_region [2022-07-23 06:26:26,110 INFO L138 BoogieDeclarations]: Found implementation of procedure release_region [2022-07-23 06:26:26,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 06:26:26,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 06:26:26,110 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_init [2022-07-23 06:26:26,110 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_init [2022-07-23 06:26:26,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-07-23 06:26:26,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-23 06:26:26,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-07-23 06:26:26,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-23 06:26:26,111 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-23 06:26:26,111 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-23 06:26:26,111 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2022-07-23 06:26:26,111 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2022-07-23 06:26:26,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 06:26:26,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 06:26:26,112 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2022-07-23 06:26:26,112 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2022-07-23 06:26:26,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-07-23 06:26:26,113 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_add [2022-07-23 06:26:26,113 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_add [2022-07-23 06:26:26,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-07-23 06:26:26,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-07-23 06:26:26,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-23 06:26:26,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 06:26:26,114 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2022-07-23 06:26:26,115 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2022-07-23 06:26:26,115 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2022-07-23 06:26:26,115 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2022-07-23 06:26:26,115 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-07-23 06:26:26,115 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-07-23 06:26:26,116 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2022-07-23 06:26:26,116 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2022-07-23 06:26:26,116 INFO L130 BoogieDeclarations]: Found specification of procedure assert_context_process [2022-07-23 06:26:26,116 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_context_process [2022-07-23 06:26:26,116 INFO L130 BoogieDeclarations]: Found specification of procedure zf_set_control [2022-07-23 06:26:26,116 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_set_control [2022-07-23 06:26:26,116 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2022-07-23 06:26:26,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2022-07-23 06:26:26,117 INFO L130 BoogieDeclarations]: Found specification of procedure zf_readw [2022-07-23 06:26:26,117 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_readw [2022-07-23 06:26:26,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-07-23 06:26:26,117 INFO L130 BoogieDeclarations]: Found specification of procedure zf_ping [2022-07-23 06:26:26,117 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_ping [2022-07-23 06:26:26,117 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-07-23 06:26:26,117 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-07-23 06:26:26,118 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2022-07-23 06:26:26,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2022-07-23 06:26:26,391 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 06:26:26,393 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 06:26:30,635 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 06:26:30,649 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 06:26:30,650 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-23 06:26:30,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:26:30 BoogieIcfgContainer [2022-07-23 06:26:30,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 06:26:30,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 06:26:30,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 06:26:30,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 06:26:30,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 06:26:24" (1/3) ... [2022-07-23 06:26:30,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b3cca62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:26:30, skipping insertion in model container [2022-07-23 06:26:30,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:25" (2/3) ... [2022-07-23 06:26:30,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b3cca62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:26:30, skipping insertion in model container [2022-07-23 06:26:30,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:26:30" (3/3) ... [2022-07-23 06:26:30,668 INFO L111 eAbstractionObserver]: Analyzing ICFG ddv_machzwd_pthread_mutex_unlock.i [2022-07-23 06:26:30,679 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 06:26:30,680 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 205 error locations. [2022-07-23 06:26:30,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 06:26:30,741 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@2141dde0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b142f0c [2022-07-23 06:26:30,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 205 error locations. [2022-07-23 06:26:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand has 666 states, 356 states have (on average 1.8202247191011236) internal successors, (648), 566 states have internal predecessors, (648), 78 states have call successors, (78), 26 states have call predecessors, (78), 26 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-07-23 06:26:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-23 06:26:30,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:26:30,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-23 06:26:30,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:26:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:26:30,757 INFO L85 PathProgramCache]: Analyzing trace with hash 333908101, now seen corresponding path program 1 times [2022-07-23 06:26:30,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:26:30,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393735456] [2022-07-23 06:26:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:26:30,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:26:30,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:26:30,771 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) [2022-07-23 06:26:30,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 06:26:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:26:31,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:26:31,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:26:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:31,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:26:31,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:26:31,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393735456] [2022-07-23 06:26:31,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393735456] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:26:31,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:26:31,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:26:31,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801614926] [2022-07-23 06:26:31,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:26:31,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:26:31,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:26:31,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:26:31,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:26:31,214 INFO L87 Difference]: Start difference. First operand has 666 states, 356 states have (on average 1.8202247191011236) internal successors, (648), 566 states have internal predecessors, (648), 78 states have call successors, (78), 26 states have call predecessors, (78), 26 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 06:26:33,242 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:35,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:37,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:26:37,250 INFO L93 Difference]: Finished difference Result 1204 states and 1443 transitions. [2022-07-23 06:26:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:26:37,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-23 06:26:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:26:37,264 INFO L225 Difference]: With dead ends: 1204 [2022-07-23 06:26:37,265 INFO L226 Difference]: Without dead ends: 1200 [2022-07-23 06:26:37,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:26:37,268 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 687 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 2484 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-23 06:26:37,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 2484 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1106 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2022-07-23 06:26:37,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-07-23 06:26:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 987. [2022-07-23 06:26:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 594 states have (on average 1.803030303030303) internal successors, (1071), 814 states have internal predecessors, (1071), 138 states have call successors, (138), 50 states have call predecessors, (138), 50 states have return successors, (138), 131 states have call predecessors, (138), 138 states have call successors, (138) [2022-07-23 06:26:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1347 transitions. [2022-07-23 06:26:37,355 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1347 transitions. Word has length 5 [2022-07-23 06:26:37,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:26:37,355 INFO L495 AbstractCegarLoop]: Abstraction has 987 states and 1347 transitions. [2022-07-23 06:26:37,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 06:26:37,358 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1347 transitions. [2022-07-23 06:26:37,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-23 06:26:37,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:26:37,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-23 06:26:37,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-23 06:26:37,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:26:37,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:26:37,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:26:37,579 INFO L85 PathProgramCache]: Analyzing trace with hash 333908102, now seen corresponding path program 1 times [2022-07-23 06:26:37,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:26:37,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939752817] [2022-07-23 06:26:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:26:37,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:26:37,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:26:37,581 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) [2022-07-23 06:26:37,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 06:26:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:26:37,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:26:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:26:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:37,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:26:37,910 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:26:37,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939752817] [2022-07-23 06:26:37,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939752817] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:26:37,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:26:37,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:26:37,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861110676] [2022-07-23 06:26:37,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:26:37,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:26:37,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:26:37,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:26:37,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:26:37,913 INFO L87 Difference]: Start difference. First operand 987 states and 1347 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 06:26:39,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:41,941 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:43,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:26:43,644 INFO L93 Difference]: Finished difference Result 1119 states and 1439 transitions. [2022-07-23 06:26:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:26:43,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-23 06:26:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:26:43,650 INFO L225 Difference]: With dead ends: 1119 [2022-07-23 06:26:43,651 INFO L226 Difference]: Without dead ends: 1119 [2022-07-23 06:26:43,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:26:43,652 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 268 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 2630 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:26:43,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 2630 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 850 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-07-23 06:26:43,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-07-23 06:26:43,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1060. [2022-07-23 06:26:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 635 states have (on average 1.7653543307086614) internal successors, (1121), 856 states have internal predecessors, (1121), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-07-23 06:26:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1435 transitions. [2022-07-23 06:26:43,694 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1435 transitions. Word has length 5 [2022-07-23 06:26:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:26:43,694 INFO L495 AbstractCegarLoop]: Abstraction has 1060 states and 1435 transitions. [2022-07-23 06:26:43,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 06:26:43,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1435 transitions. [2022-07-23 06:26:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 06:26:43,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:26:43,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:26:43,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-23 06:26:43,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:26:43,907 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:26:43,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:26:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash -863937403, now seen corresponding path program 1 times [2022-07-23 06:26:43,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:26:43,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181764526] [2022-07-23 06:26:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:26:43,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:26:43,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:26:43,910 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) [2022-07-23 06:26:43,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 06:26:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:26:44,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:26:44,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:26:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:44,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:26:44,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:26:44,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181764526] [2022-07-23 06:26:44,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181764526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:26:44,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:26:44,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-23 06:26:44,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296870758] [2022-07-23 06:26:44,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:26:44,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:26:44,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:26:44,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:26:44,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:26:44,265 INFO L87 Difference]: Start difference. First operand 1060 states and 1435 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-07-23 06:26:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:26:45,351 INFO L93 Difference]: Finished difference Result 1266 states and 1522 transitions. [2022-07-23 06:26:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:26:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 11 [2022-07-23 06:26:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:26:45,356 INFO L225 Difference]: With dead ends: 1266 [2022-07-23 06:26:45,356 INFO L226 Difference]: Without dead ends: 1266 [2022-07-23 06:26:45,356 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 [2022-07-23 06:26:45,357 INFO L413 NwaCegarLoop]: 742 mSDtfsCounter, 660 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:26:45,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 1290 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-23 06:26:45,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2022-07-23 06:26:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1059. [2022-07-23 06:26:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 635 states have (on average 1.75748031496063) internal successors, (1116), 855 states have internal predecessors, (1116), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-07-23 06:26:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1430 transitions. [2022-07-23 06:26:45,417 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1430 transitions. Word has length 11 [2022-07-23 06:26:45,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:26:45,417 INFO L495 AbstractCegarLoop]: Abstraction has 1059 states and 1430 transitions. [2022-07-23 06:26:45,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-07-23 06:26:45,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1430 transitions. [2022-07-23 06:26:45,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 06:26:45,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:26:45,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:26:45,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-23 06:26:45,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:26:45,619 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:26:45,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:26:45,620 INFO L85 PathProgramCache]: Analyzing trace with hash -863937402, now seen corresponding path program 1 times [2022-07-23 06:26:45,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:26:45,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127989861] [2022-07-23 06:26:45,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:26:45,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:26:45,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:26:45,636 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) [2022-07-23 06:26:45,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 06:26:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:26:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:26:46,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:26:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:46,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:26:46,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:26:46,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127989861] [2022-07-23 06:26:46,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127989861] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:26:46,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:26:46,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:26:46,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33322185] [2022-07-23 06:26:46,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:26:46,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:26:46,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:26:46,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:26:46,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:26:46,107 INFO L87 Difference]: Start difference. First operand 1059 states and 1430 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-23 06:26:48,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:26:49,350 INFO L93 Difference]: Finished difference Result 1125 states and 1445 transitions. [2022-07-23 06:26:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:26:49,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 11 [2022-07-23 06:26:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:26:49,354 INFO L225 Difference]: With dead ends: 1125 [2022-07-23 06:26:49,354 INFO L226 Difference]: Without dead ends: 1125 [2022-07-23 06:26:49,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:26:49,355 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 268 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:26:49,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1514 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 410 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-07-23 06:26:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-07-23 06:26:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1062. [2022-07-23 06:26:49,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 638 states have (on average 1.7539184952978057) internal successors, (1119), 858 states have internal predecessors, (1119), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-07-23 06:26:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1433 transitions. [2022-07-23 06:26:49,391 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1433 transitions. Word has length 11 [2022-07-23 06:26:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:26:49,397 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1433 transitions. [2022-07-23 06:26:49,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-23 06:26:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1433 transitions. [2022-07-23 06:26:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 06:26:49,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:26:49,399 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:26:49,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-23 06:26:49,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:26:49,609 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:26:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:26:49,610 INFO L85 PathProgramCache]: Analyzing trace with hash -2114831441, now seen corresponding path program 1 times [2022-07-23 06:26:49,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:26:49,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466297644] [2022-07-23 06:26:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:26:49,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:26:49,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:26:49,611 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) [2022-07-23 06:26:49,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 06:26:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:26:49,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:26:49,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:26:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:50,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:26:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:50,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:26:50,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466297644] [2022-07-23 06:26:50,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466297644] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:26:50,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:26:50,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2022-07-23 06:26:50,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933424043] [2022-07-23 06:26:50,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:26:50,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:26:50,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:26:50,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:26:50,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:26:50,327 INFO L87 Difference]: Start difference. First operand 1062 states and 1433 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:26:52,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:54,353 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:56,362 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:02,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:02,260 INFO L93 Difference]: Finished difference Result 1335 states and 1679 transitions. [2022-07-23 06:27:02,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:27:02,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-07-23 06:27:02,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:02,264 INFO L225 Difference]: With dead ends: 1335 [2022-07-23 06:27:02,264 INFO L226 Difference]: Without dead ends: 1335 [2022-07-23 06:27:02,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:27:02,266 INFO L413 NwaCegarLoop]: 838 mSDtfsCounter, 863 mSDsluCounter, 2512 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 125 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:02,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [875 Valid, 3350 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1547 Invalid, 3 Unknown, 0 Unchecked, 11.7s Time] [2022-07-23 06:27:02,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2022-07-23 06:27:02,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1209. [2022-07-23 06:27:02,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 742 states have (on average 1.7398921832884098) internal successors, (1291), 964 states have internal predecessors, (1291), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:27:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1659 transitions. [2022-07-23 06:27:02,304 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1659 transitions. Word has length 14 [2022-07-23 06:27:02,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:02,304 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 1659 transitions. [2022-07-23 06:27:02,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:27:02,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1659 transitions. [2022-07-23 06:27:02,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-23 06:27:02,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:02,304 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:02,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-23 06:27:02,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:27:02,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:27:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash -846555216, now seen corresponding path program 1 times [2022-07-23 06:27:02,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:27:02,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867763152] [2022-07-23 06:27:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:27:02,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:27:02,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:27:02,515 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) [2022-07-23 06:27:02,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 06:27:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:02,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:27:02,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:27:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:02,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:27:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:02,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:27:02,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867763152] [2022-07-23 06:27:02,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867763152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:27:02,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:27:02,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-23 06:27:02,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221231257] [2022-07-23 06:27:02,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:27:02,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:27:02,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:27:02,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:27:02,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:27:02,916 INFO L87 Difference]: Start difference. First operand 1209 states and 1659 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2022-07-23 06:27:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:03,143 INFO L93 Difference]: Finished difference Result 1215 states and 1663 transitions. [2022-07-23 06:27:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:27:03,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 19 [2022-07-23 06:27:03,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:03,147 INFO L225 Difference]: With dead ends: 1215 [2022-07-23 06:27:03,147 INFO L226 Difference]: Without dead ends: 1215 [2022-07-23 06:27:03,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:27:03,148 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 442 mSDsluCounter, 2810 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 3595 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:03,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 3595 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:27:03,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-07-23 06:27:03,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1214. [2022-07-23 06:27:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 747 states have (on average 1.7336010709504686) internal successors, (1295), 969 states have internal predecessors, (1295), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:27:03,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1663 transitions. [2022-07-23 06:27:03,167 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1663 transitions. Word has length 19 [2022-07-23 06:27:03,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:03,167 INFO L495 AbstractCegarLoop]: Abstraction has 1214 states and 1663 transitions. [2022-07-23 06:27:03,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2022-07-23 06:27:03,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1663 transitions. [2022-07-23 06:27:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 06:27:03,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:03,168 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:03,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-23 06:27:03,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:27:03,381 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:27:03,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:03,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1706941254, now seen corresponding path program 2 times [2022-07-23 06:27:03,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:27:03,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651352456] [2022-07-23 06:27:03,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:27:03,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:27:03,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:27:03,384 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) [2022-07-23 06:27:03,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 06:27:03,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:27:03,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:27:03,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 06:27:03,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:27:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:04,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:27:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:04,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:27:04,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651352456] [2022-07-23 06:27:04,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651352456] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:27:04,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:27:04,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2022-07-23 06:27:04,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001831718] [2022-07-23 06:27:04,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:27:04,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 06:27:04,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:27:04,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 06:27:04,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-23 06:27:04,979 INFO L87 Difference]: Start difference. First operand 1214 states and 1663 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:27:06,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:09,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:11,016 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:24,246 INFO L93 Difference]: Finished difference Result 1341 states and 1697 transitions. [2022-07-23 06:27:24,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 06:27:24,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-07-23 06:27:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:24,250 INFO L225 Difference]: With dead ends: 1341 [2022-07-23 06:27:24,250 INFO L226 Difference]: Without dead ends: 1341 [2022-07-23 06:27:24,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2022-07-23 06:27:24,251 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 1112 mSDsluCounter, 4369 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 202 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 5195 SdHoareTripleChecker+Invalid, 2762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2557 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:24,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 5195 Invalid, 2762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2557 Invalid, 3 Unknown, 0 Unchecked, 17.7s Time] [2022-07-23 06:27:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-07-23 06:27:24,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1227. [2022-07-23 06:27:24,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 760 states have (on average 1.725) internal successors, (1311), 982 states have internal predecessors, (1311), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:27:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1679 transitions. [2022-07-23 06:27:24,270 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1679 transitions. Word has length 23 [2022-07-23 06:27:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:24,270 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 1679 transitions. [2022-07-23 06:27:24,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:27:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1679 transitions. [2022-07-23 06:27:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 06:27:24,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:24,271 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:24,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-23 06:27:24,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:27:24,477 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:27:24,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:24,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1287411312, now seen corresponding path program 2 times [2022-07-23 06:27:24,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:27:24,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601785479] [2022-07-23 06:27:24,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:27:24,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:27:24,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:27:24,479 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) [2022-07-23 06:27:24,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-23 06:27:24,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-23 06:27:24,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:27:24,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:27:24,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:27:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-23 06:27:24,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:27:24,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:27:24,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601785479] [2022-07-23 06:27:24,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601785479] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:27:24,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:27:24,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-23 06:27:24,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981788685] [2022-07-23 06:27:24,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:27:24,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:27:24,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:27:24,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:27:24,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:27:24,968 INFO L87 Difference]: Start difference. First operand 1227 states and 1679 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-07-23 06:27:26,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:26,135 INFO L93 Difference]: Finished difference Result 1435 states and 1772 transitions. [2022-07-23 06:27:26,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:27:26,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 31 [2022-07-23 06:27:26,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:26,140 INFO L225 Difference]: With dead ends: 1435 [2022-07-23 06:27:26,140 INFO L226 Difference]: Without dead ends: 1435 [2022-07-23 06:27:26,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:27:26,140 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 646 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:26,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 1288 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-23 06:27:26,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2022-07-23 06:27:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1225. [2022-07-23 06:27:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 760 states have (on average 1.7131578947368422) internal successors, (1302), 980 states have internal predecessors, (1302), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:27:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1670 transitions. [2022-07-23 06:27:26,166 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1670 transitions. Word has length 31 [2022-07-23 06:27:26,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:26,167 INFO L495 AbstractCegarLoop]: Abstraction has 1225 states and 1670 transitions. [2022-07-23 06:27:26,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-07-23 06:27:26,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1670 transitions. [2022-07-23 06:27:26,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 06:27:26,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:26,168 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:26,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-23 06:27:26,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:27:26,379 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:27:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:26,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1287411313, now seen corresponding path program 1 times [2022-07-23 06:27:26,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:27:26,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89682937] [2022-07-23 06:27:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:27:26,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:27:26,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:27:26,382 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) [2022-07-23 06:27:26,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 06:27:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:26,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:27:26,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:27:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:26,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:27:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:27,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:27:27,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89682937] [2022-07-23 06:27:27,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89682937] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:27:27,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:27:27,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-23 06:27:27,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374061752] [2022-07-23 06:27:27,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:27:27,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 06:27:27,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:27:27,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 06:27:27,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:27:27,076 INFO L87 Difference]: Start difference. First operand 1225 states and 1670 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 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) [2022-07-23 06:27:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:27,605 INFO L93 Difference]: Finished difference Result 1225 states and 1666 transitions. [2022-07-23 06:27:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 06:27:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 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 31 [2022-07-23 06:27:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:27,609 INFO L225 Difference]: With dead ends: 1225 [2022-07-23 06:27:27,609 INFO L226 Difference]: Without dead ends: 1225 [2022-07-23 06:27:27,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-07-23 06:27:27,610 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 868 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 6249 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:27,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 6249 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 06:27:27,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-07-23 06:27:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1225. [2022-07-23 06:27:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 760 states have (on average 1.7078947368421054) internal successors, (1298), 980 states have internal predecessors, (1298), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:27:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1666 transitions. [2022-07-23 06:27:27,633 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1666 transitions. Word has length 31 [2022-07-23 06:27:27,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:27,634 INFO L495 AbstractCegarLoop]: Abstraction has 1225 states and 1666 transitions. [2022-07-23 06:27:27,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 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) [2022-07-23 06:27:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1666 transitions. [2022-07-23 06:27:27,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:27:27,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:27,636 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:27,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-23 06:27:27,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:27:27,847 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:27:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:27,847 INFO L85 PathProgramCache]: Analyzing trace with hash 338189670, now seen corresponding path program 3 times [2022-07-23 06:27:27,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:27:27,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317236220] [2022-07-23 06:27:27,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 06:27:27,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:27:27,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:27:27,849 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) [2022-07-23 06:27:27,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 06:27:28,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-23 06:27:28,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:27:28,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 06:27:28,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:27:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:29,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:27:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:31,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:27:31,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317236220] [2022-07-23 06:27:31,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317236220] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:27:31,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:27:31,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2022-07-23 06:27:31,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419420451] [2022-07-23 06:27:31,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:27:31,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 06:27:31,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:27:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 06:27:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-07-23 06:27:31,596 INFO L87 Difference]: Start difference. First operand 1225 states and 1666 transitions. Second operand has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:27:33,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:35,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:37,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:39,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:41,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:43,660 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:45,669 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:47,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:14,348 INFO L93 Difference]: Finished difference Result 1574 states and 1894 transitions. [2022-07-23 06:28:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 06:28:14,349 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-07-23 06:28:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:14,353 INFO L225 Difference]: With dead ends: 1574 [2022-07-23 06:28:14,353 INFO L226 Difference]: Without dead ends: 1574 [2022-07-23 06:28:14,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2022-07-23 06:28:14,354 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 2005 mSDsluCounter, 8344 mSDsCounter, 0 mSdLazyCounter, 5799 mSolverCounterSat, 226 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2017 SdHoareTripleChecker+Valid, 9096 SdHoareTripleChecker+Invalid, 6033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 5799 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:14,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2017 Valid, 9096 Invalid, 6033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 5799 Invalid, 8 Unknown, 0 Unchecked, 41.8s Time] [2022-07-23 06:28:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2022-07-23 06:28:14,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1223. [2022-07-23 06:28:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 759 states have (on average 1.7061923583662715) internal successors, (1295), 978 states have internal predecessors, (1295), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:28:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1663 transitions. [2022-07-23 06:28:14,378 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1663 transitions. Word has length 41 [2022-07-23 06:28:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:14,378 INFO L495 AbstractCegarLoop]: Abstraction has 1223 states and 1663 transitions. [2022-07-23 06:28:14,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:28:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1663 transitions. [2022-07-23 06:28:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 06:28:14,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:14,383 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:14,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:14,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:14,597 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:28:14,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:14,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1417284303, now seen corresponding path program 2 times [2022-07-23 06:28:14,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:14,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407067080] [2022-07-23 06:28:14,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:28:14,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:14,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:14,612 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) [2022-07-23 06:28:14,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 06:28:15,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-23 06:28:15,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:28:15,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:28:15,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-23 06:28:15,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:15,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:15,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407067080] [2022-07-23 06:28:15,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407067080] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:15,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:15,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:28:15,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193579064] [2022-07-23 06:28:15,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:15,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:28:15,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:15,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:28:15,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:28:15,262 INFO L87 Difference]: Start difference. First operand 1223 states and 1663 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-23 06:28:17,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:18,616 INFO L93 Difference]: Finished difference Result 1279 states and 1675 transitions. [2022-07-23 06:28:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:28:18,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 43 [2022-07-23 06:28:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:18,620 INFO L225 Difference]: With dead ends: 1279 [2022-07-23 06:28:18,620 INFO L226 Difference]: Without dead ends: 1279 [2022-07-23 06:28:18,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:28:18,621 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 237 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:18,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 1498 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 404 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-07-23 06:28:18,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-07-23 06:28:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1221. [2022-07-23 06:28:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 759 states have (on average 1.7035573122529644) internal successors, (1293), 976 states have internal predecessors, (1293), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:28:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1661 transitions. [2022-07-23 06:28:18,638 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1661 transitions. Word has length 43 [2022-07-23 06:28:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:18,639 INFO L495 AbstractCegarLoop]: Abstraction has 1221 states and 1661 transitions. [2022-07-23 06:28:18,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-23 06:28:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1661 transitions. [2022-07-23 06:28:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 06:28:18,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:18,640 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 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] [2022-07-23 06:28:18,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:18,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:18,851 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:28:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:18,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1129900010, now seen corresponding path program 1 times [2022-07-23 06:28:18,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:18,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350415089] [2022-07-23 06:28:18,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:18,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:18,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:18,853 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) [2022-07-23 06:28:18,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 06:28:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:19,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:28:19,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:19,351 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 [2022-07-23 06:28:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-23 06:28:19,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:19,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:19,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350415089] [2022-07-23 06:28:19,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350415089] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:19,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:19,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:28:19,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671365838] [2022-07-23 06:28:19,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:19,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:28:19,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:19,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:28:19,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:28:19,359 INFO L87 Difference]: Start difference. First operand 1221 states and 1661 transitions. Second operand has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-23 06:28:21,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:22,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:22,076 INFO L93 Difference]: Finished difference Result 1220 states and 1660 transitions. [2022-07-23 06:28:22,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:28:22,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2022-07-23 06:28:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:22,080 INFO L225 Difference]: With dead ends: 1220 [2022-07-23 06:28:22,080 INFO L226 Difference]: Without dead ends: 1220 [2022-07-23 06:28:22,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:28:22,081 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 2 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:22,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1363 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-07-23 06:28:22,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-07-23 06:28:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1220. [2022-07-23 06:28:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 759 states have (on average 1.702239789196311) internal successors, (1292), 975 states have internal predecessors, (1292), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:28:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1660 transitions. [2022-07-23 06:28:22,103 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1660 transitions. Word has length 67 [2022-07-23 06:28:22,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:22,104 INFO L495 AbstractCegarLoop]: Abstraction has 1220 states and 1660 transitions. [2022-07-23 06:28:22,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-23 06:28:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1660 transitions. [2022-07-23 06:28:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 06:28:22,106 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:22,106 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 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] [2022-07-23 06:28:22,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:22,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:22,339 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:28:22,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:22,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1129900011, now seen corresponding path program 1 times [2022-07-23 06:28:22,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:22,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086569918] [2022-07-23 06:28:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:22,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:22,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:22,342 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) [2022-07-23 06:28:22,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 06:28:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:22,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:28:22,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:23,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-23 06:28:23,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:23,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:23,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086569918] [2022-07-23 06:28:23,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086569918] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:23,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:23,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:28:23,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062390936] [2022-07-23 06:28:23,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:23,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:28:23,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:23,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:28:23,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:28:23,051 INFO L87 Difference]: Start difference. First operand 1220 states and 1660 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-23 06:28:25,071 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:25,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:25,964 INFO L93 Difference]: Finished difference Result 1219 states and 1658 transitions. [2022-07-23 06:28:25,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:28:25,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2022-07-23 06:28:25,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:25,968 INFO L225 Difference]: With dead ends: 1219 [2022-07-23 06:28:25,968 INFO L226 Difference]: Without dead ends: 1219 [2022-07-23 06:28:25,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:28:25,969 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 749 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:25,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 1362 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-07-23 06:28:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-07-23 06:28:25,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1219. [2022-07-23 06:28:25,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 759 states have (on average 1.699604743083004) internal successors, (1290), 974 states have internal predecessors, (1290), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:28:25,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1658 transitions. [2022-07-23 06:28:25,987 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1658 transitions. Word has length 67 [2022-07-23 06:28:25,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:25,987 INFO L495 AbstractCegarLoop]: Abstraction has 1219 states and 1658 transitions. [2022-07-23 06:28:25,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-23 06:28:25,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1658 transitions. [2022-07-23 06:28:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-23 06:28:25,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:25,988 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:26,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:26,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:26,202 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr164ASSERT_VIOLATIONMEMORY_LEAK === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:28:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:26,202 INFO L85 PathProgramCache]: Analyzing trace with hash -366255816, now seen corresponding path program 1 times [2022-07-23 06:28:26,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:26,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724647674] [2022-07-23 06:28:26,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:26,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:26,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:26,205 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) [2022-07-23 06:28:26,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 06:28:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:26,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 06:28:26,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-23 06:28:26,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:26,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:26,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724647674] [2022-07-23 06:28:26,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724647674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:26,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:26,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:28:26,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559663585] [2022-07-23 06:28:26,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:26,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:28:26,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:26,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:28:26,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:28:26,807 INFO L87 Difference]: Start difference. First operand 1219 states and 1658 transitions. Second operand has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:28:28,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:29,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:29,574 INFO L93 Difference]: Finished difference Result 1260 states and 1667 transitions. [2022-07-23 06:28:29,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:28:29,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 74 [2022-07-23 06:28:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:29,578 INFO L225 Difference]: With dead ends: 1260 [2022-07-23 06:28:29,578 INFO L226 Difference]: Without dead ends: 1248 [2022-07-23 06:28:29,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:28:29,579 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 93 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:29,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1323 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-07-23 06:28:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-07-23 06:28:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1215. [2022-07-23 06:28:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 757 states have (on average 1.7001321003963012) internal successors, (1287), 972 states have internal predecessors, (1287), 183 states have call successors, (183), 79 states have call predecessors, (183), 78 states have return successors, (181), 174 states have call predecessors, (181), 181 states have call successors, (181) [2022-07-23 06:28:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1651 transitions. [2022-07-23 06:28:29,601 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1651 transitions. Word has length 74 [2022-07-23 06:28:29,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:29,601 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 1651 transitions. [2022-07-23 06:28:29,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:28:29,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1651 transitions. [2022-07-23 06:28:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-23 06:28:29,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:29,602 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:29,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-23 06:28:29,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:29,816 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:28:29,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:29,816 INFO L85 PathProgramCache]: Analyzing trace with hash -475870393, now seen corresponding path program 1 times [2022-07-23 06:28:29,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:29,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869816999] [2022-07-23 06:28:29,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:29,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:29,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:29,819 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) [2022-07-23 06:28:29,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-23 06:28:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:28:30,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:31,162 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:28:31,162 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 [2022-07-23 06:28:31,221 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 14 treesize of output 16 [2022-07-23 06:28:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-23 06:28:31,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:31,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:31,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869816999] [2022-07-23 06:28:31,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869816999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:31,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1485590863] [2022-07-23 06:28:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:31,342 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:28:31,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:28:31,344 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:28:31,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-07-23 06:28:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:32,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 06:28:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:33,321 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-23 06:28:33,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 39 [2022-07-23 06:28:33,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-23 06:28:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-23 06:28:33,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:33,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1485590863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:33,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:28:33,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-23 06:28:33,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800856342] [2022-07-23 06:28:33,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:33,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:28:33,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:33,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:28:33,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:28:33,510 INFO L87 Difference]: Start difference. First operand 1215 states and 1651 transitions. Second operand has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-23 06:28:35,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:37,538 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:39,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:42,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:42,481 INFO L93 Difference]: Finished difference Result 1748 states and 2289 transitions. [2022-07-23 06:28:42,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:28:42,482 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 76 [2022-07-23 06:28:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:42,486 INFO L225 Difference]: With dead ends: 1748 [2022-07-23 06:28:42,486 INFO L226 Difference]: Without dead ends: 1748 [2022-07-23 06:28:42,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:28:42,487 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 1348 mSDsluCounter, 2902 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 156 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 3609 SdHoareTripleChecker+Invalid, 2429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:42,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1349 Valid, 3609 Invalid, 2429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2270 Invalid, 3 Unknown, 0 Unchecked, 8.9s Time] [2022-07-23 06:28:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2022-07-23 06:28:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1525. [2022-07-23 06:28:42,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 987 states have (on average 1.7294832826747721) internal successors, (1707), 1213 states have internal predecessors, (1707), 241 states have call successors, (241), 101 states have call predecessors, (241), 100 states have return successors, (239), 225 states have call predecessors, (239), 239 states have call successors, (239) [2022-07-23 06:28:42,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2187 transitions. [2022-07-23 06:28:42,508 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2187 transitions. Word has length 76 [2022-07-23 06:28:42,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:42,508 INFO L495 AbstractCegarLoop]: Abstraction has 1525 states and 2187 transitions. [2022-07-23 06:28:42,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-23 06:28:42,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2187 transitions. [2022-07-23 06:28:42,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-23 06:28:42,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:42,509 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:42,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-07-23 06:28:42,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:42,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:42,919 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:28:42,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash -475870392, now seen corresponding path program 1 times [2022-07-23 06:28:42,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:42,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943593926] [2022-07-23 06:28:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:42,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:42,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:42,922 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) [2022-07-23 06:28:42,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-23 06:28:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:44,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:28:44,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:44,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:44,546 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 [2022-07-23 06:28:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-23 06:28:44,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:46,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:46,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943593926] [2022-07-23 06:28:46,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943593926] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:46,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1078996095] [2022-07-23 06:28:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:46,961 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:28:46,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:28:46,963 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:28:46,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-07-23 06:28:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:48,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:28:48,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:49,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:49,079 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 [2022-07-23 06:28:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-23 06:28:49,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:49,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1078996095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:49,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:28:49,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-23 06:28:49,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796871656] [2022-07-23 06:28:49,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:49,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:28:49,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:49,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:28:49,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:28:49,343 INFO L87 Difference]: Start difference. First operand 1525 states and 2187 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:28:51,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:53,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:56,956 INFO L93 Difference]: Finished difference Result 1948 states and 2512 transitions. [2022-07-23 06:28:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:28:56,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 76 [2022-07-23 06:28:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:56,962 INFO L225 Difference]: With dead ends: 1948 [2022-07-23 06:28:56,962 INFO L226 Difference]: Without dead ends: 1948 [2022-07-23 06:28:56,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:28:56,962 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 994 mSDsluCounter, 1688 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 2311 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:56,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 2311 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1905 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2022-07-23 06:28:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2022-07-23 06:28:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1702. [2022-07-23 06:28:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1122 states have (on average 1.7379679144385027) internal successors, (1950), 1344 states have internal predecessors, (1950), 268 states have call successors, (268), 116 states have call predecessors, (268), 115 states have return successors, (266), 257 states have call predecessors, (266), 266 states have call successors, (266) [2022-07-23 06:28:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2484 transitions. [2022-07-23 06:28:57,011 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2484 transitions. Word has length 76 [2022-07-23 06:28:57,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:57,011 INFO L495 AbstractCegarLoop]: Abstraction has 1702 states and 2484 transitions. [2022-07-23 06:28:57,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:28:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2484 transitions. [2022-07-23 06:28:57,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-23 06:28:57,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:57,013 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:57,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:57,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:57,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:57,439 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:28:57,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:57,440 INFO L85 PathProgramCache]: Analyzing trace with hash 862802860, now seen corresponding path program 1 times [2022-07-23 06:28:57,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:57,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102702153] [2022-07-23 06:28:57,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:57,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:57,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:57,442 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) [2022-07-23 06:28:57,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 06:28:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:58,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:28:58,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:58,881 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:28:58,882 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 [2022-07-23 06:28:58,933 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 13 treesize of output 15 [2022-07-23 06:28:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-07-23 06:28:58,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:59,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:59,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102702153] [2022-07-23 06:28:59,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102702153] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:59,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1339671012] [2022-07-23 06:28:59,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:59,062 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:28:59,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:28:59,063 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:28:59,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-23 06:29:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:00,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 06:29:00,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:00,921 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-23 06:29:00,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 39 [2022-07-23 06:29:00,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-07-23 06:29:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-07-23 06:29:01,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:01,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1339671012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:01,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:29:01,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-23 06:29:01,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143518442] [2022-07-23 06:29:01,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:29:01,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:29:01,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:01,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:29:01,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:29:01,095 INFO L87 Difference]: Start difference. First operand 1702 states and 2484 transitions. Second operand has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-23 06:29:03,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:05,119 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:07,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:09,139 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:12,360 INFO L93 Difference]: Finished difference Result 1877 states and 2496 transitions. [2022-07-23 06:29:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:29:12,361 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 82 [2022-07-23 06:29:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:12,366 INFO L225 Difference]: With dead ends: 1877 [2022-07-23 06:29:12,366 INFO L226 Difference]: Without dead ends: 1877 [2022-07-23 06:29:12,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:29:12,367 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 749 mSDsluCounter, 3364 mSDsCounter, 0 mSdLazyCounter, 2424 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 4071 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2424 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:12,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 4071 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2424 Invalid, 4 Unknown, 0 Unchecked, 11.2s Time] [2022-07-23 06:29:12,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-07-23 06:29:12,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1700. [2022-07-23 06:29:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1122 states have (on average 1.7361853832442067) internal successors, (1948), 1342 states have internal predecessors, (1948), 268 states have call successors, (268), 116 states have call predecessors, (268), 115 states have return successors, (266), 257 states have call predecessors, (266), 266 states have call successors, (266) [2022-07-23 06:29:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2482 transitions. [2022-07-23 06:29:12,389 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2482 transitions. Word has length 82 [2022-07-23 06:29:12,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:12,389 INFO L495 AbstractCegarLoop]: Abstraction has 1700 states and 2482 transitions. [2022-07-23 06:29:12,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-23 06:29:12,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2482 transitions. [2022-07-23 06:29:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-23 06:29:12,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:12,390 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:12,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:12,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-07-23 06:29:12,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:29:12,805 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:29:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:12,805 INFO L85 PathProgramCache]: Analyzing trace with hash 862802861, now seen corresponding path program 1 times [2022-07-23 06:29:12,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:12,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181482309] [2022-07-23 06:29:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:12,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:12,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:12,807 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) [2022-07-23 06:29:12,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 06:29:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:14,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:29:14,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:14,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:14,487 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 [2022-07-23 06:29:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-23 06:29:14,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:16,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:16,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181482309] [2022-07-23 06:29:16,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181482309] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:16,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1481937667] [2022-07-23 06:29:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:16,891 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:29:16,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:29:16,895 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:29:16,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-07-23 06:29:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:18,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:29:18,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:19,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:19,113 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 [2022-07-23 06:29:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-23 06:29:19,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:19,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1481937667] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:19,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:29:19,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-23 06:29:19,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545301077] [2022-07-23 06:29:19,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:29:19,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:29:19,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:19,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:29:19,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:29:19,442 INFO L87 Difference]: Start difference. First operand 1700 states and 2482 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-23 06:29:21,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:23,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:27,290 INFO L93 Difference]: Finished difference Result 1944 states and 2508 transitions. [2022-07-23 06:29:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:29:27,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2022-07-23 06:29:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:27,296 INFO L225 Difference]: With dead ends: 1944 [2022-07-23 06:29:27,296 INFO L226 Difference]: Without dead ends: 1944 [2022-07-23 06:29:27,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:29:27,296 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 983 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 2313 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:27,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 2313 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1897 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2022-07-23 06:29:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-07-23 06:29:27,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1698. [2022-07-23 06:29:27,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1122 states have (on average 1.7344028520499108) internal successors, (1946), 1340 states have internal predecessors, (1946), 268 states have call successors, (268), 116 states have call predecessors, (268), 115 states have return successors, (266), 257 states have call predecessors, (266), 266 states have call successors, (266) [2022-07-23 06:29:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2480 transitions. [2022-07-23 06:29:27,322 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2480 transitions. Word has length 82 [2022-07-23 06:29:27,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:27,322 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 2480 transitions. [2022-07-23 06:29:27,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-23 06:29:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2480 transitions. [2022-07-23 06:29:27,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-23 06:29:27,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:27,323 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:27,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:27,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:27,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:29:27,739 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr114REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:29:27,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:27,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1028659715, now seen corresponding path program 1 times [2022-07-23 06:29:27,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:27,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371435583] [2022-07-23 06:29:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:27,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:27,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:27,741 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) [2022-07-23 06:29:27,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-23 06:29:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:28,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:29:28,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-23 06:29:28,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:28,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:28,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371435583] [2022-07-23 06:29:28,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371435583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:28,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:28,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:29:28,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313691495] [2022-07-23 06:29:28,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:28,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:29:28,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:28,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:29:28,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:29:28,431 INFO L87 Difference]: Start difference. First operand 1698 states and 2480 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-23 06:29:28,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:28,473 INFO L93 Difference]: Finished difference Result 1336 states and 1886 transitions. [2022-07-23 06:29:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:29:28,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 81 [2022-07-23 06:29:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:28,489 INFO L225 Difference]: With dead ends: 1336 [2022-07-23 06:29:28,492 INFO L226 Difference]: Without dead ends: 1331 [2022-07-23 06:29:28,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:29:28,493 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 3 mSDsluCounter, 2340 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3124 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:28,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3124 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:29:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-07-23 06:29:28,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1331. [2022-07-23 06:29:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 861 states have (on average 1.7375145180023228) internal successors, (1496), 1067 states have internal predecessors, (1496), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-07-23 06:29:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1880 transitions. [2022-07-23 06:29:28,516 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1880 transitions. Word has length 81 [2022-07-23 06:29:28,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:28,517 INFO L495 AbstractCegarLoop]: Abstraction has 1331 states and 1880 transitions. [2022-07-23 06:29:28,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-23 06:29:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1880 transitions. [2022-07-23 06:29:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-23 06:29:28,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:28,518 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:28,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-23 06:29:28,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:28,748 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:29:28,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:28,749 INFO L85 PathProgramCache]: Analyzing trace with hash 838655585, now seen corresponding path program 1 times [2022-07-23 06:29:28,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:28,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125867378] [2022-07-23 06:29:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:28,750 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:28,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:28,769 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) [2022-07-23 06:29:28,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 06:29:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:30,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:29:30,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:30,486 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:29:30,486 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 [2022-07-23 06:29:30,545 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 14 treesize of output 16 [2022-07-23 06:29:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-23 06:29:30,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:30,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:30,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125867378] [2022-07-23 06:29:30,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125867378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:30,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:30,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:29:30,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877504211] [2022-07-23 06:29:30,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:30,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:29:30,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:30,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:29:30,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:29:30,593 INFO L87 Difference]: Start difference. First operand 1331 states and 1880 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-23 06:29:32,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:34,035 INFO L93 Difference]: Finished difference Result 1506 states and 1892 transitions. [2022-07-23 06:29:34,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:29:34,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-07-23 06:29:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:34,039 INFO L225 Difference]: With dead ends: 1506 [2022-07-23 06:29:34,039 INFO L226 Difference]: Without dead ends: 1506 [2022-07-23 06:29:34,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:29:34,040 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 722 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:34,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1580 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 733 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-07-23 06:29:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-07-23 06:29:34,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1329. [2022-07-23 06:29:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 861 states have (on average 1.735191637630662) internal successors, (1494), 1065 states have internal predecessors, (1494), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-07-23 06:29:34,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1878 transitions. [2022-07-23 06:29:34,054 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1878 transitions. Word has length 88 [2022-07-23 06:29:34,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:34,054 INFO L495 AbstractCegarLoop]: Abstraction has 1329 states and 1878 transitions. [2022-07-23 06:29:34,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-23 06:29:34,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1878 transitions. [2022-07-23 06:29:34,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-23 06:29:34,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:34,055 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:34,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:34,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:34,272 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:29:34,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:34,273 INFO L85 PathProgramCache]: Analyzing trace with hash 838655586, now seen corresponding path program 1 times [2022-07-23 06:29:34,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:34,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305906388] [2022-07-23 06:29:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:34,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:34,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:34,275 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) [2022-07-23 06:29:34,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-23 06:29:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:35,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:29:35,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:36,170 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:29:36,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:29:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-23 06:29:36,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:36,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:36,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305906388] [2022-07-23 06:29:36,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305906388] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:36,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:36,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:29:36,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617956130] [2022-07-23 06:29:36,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:36,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:29:36,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:36,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:29:36,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:29:36,347 INFO L87 Difference]: Start difference. First operand 1329 states and 1878 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-23 06:29:38,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:39,858 INFO L93 Difference]: Finished difference Result 1380 states and 1885 transitions. [2022-07-23 06:29:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:29:39,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 88 [2022-07-23 06:29:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:39,862 INFO L225 Difference]: With dead ends: 1380 [2022-07-23 06:29:39,862 INFO L226 Difference]: Without dead ends: 1380 [2022-07-23 06:29:39,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:29:39,862 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 123 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:39,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1857 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 516 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-07-23 06:29:39,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-07-23 06:29:39,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1327. [2022-07-23 06:29:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 861 states have (on average 1.7317073170731707) internal successors, (1491), 1063 states have internal predecessors, (1491), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-07-23 06:29:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1875 transitions. [2022-07-23 06:29:39,877 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1875 transitions. Word has length 88 [2022-07-23 06:29:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:39,878 INFO L495 AbstractCegarLoop]: Abstraction has 1327 states and 1875 transitions. [2022-07-23 06:29:39,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-23 06:29:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1875 transitions. [2022-07-23 06:29:39,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-23 06:29:39,879 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:39,879 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:39,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:40,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:40,108 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:29:40,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:40,108 INFO L85 PathProgramCache]: Analyzing trace with hash 228519724, now seen corresponding path program 1 times [2022-07-23 06:29:40,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:40,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169805070] [2022-07-23 06:29:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:40,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:40,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:40,111 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) [2022-07-23 06:29:40,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-23 06:29:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:41,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:29:41,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:41,739 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:29:41,739 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 [2022-07-23 06:29:41,776 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 14 treesize of output 16 [2022-07-23 06:29:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-23 06:29:41,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:41,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:41,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169805070] [2022-07-23 06:29:41,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169805070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:41,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:41,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:29:41,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366571540] [2022-07-23 06:29:41,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:41,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:29:41,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:41,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:29:41,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:29:41,831 INFO L87 Difference]: Start difference. First operand 1327 states and 1875 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-23 06:29:43,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:45,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:47,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:47,860 INFO L93 Difference]: Finished difference Result 1502 states and 1887 transitions. [2022-07-23 06:29:47,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:29:47,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2022-07-23 06:29:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:47,865 INFO L225 Difference]: With dead ends: 1502 [2022-07-23 06:29:47,865 INFO L226 Difference]: Without dead ends: 1502 [2022-07-23 06:29:47,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:29:47,865 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 1081 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 59 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 2137 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:47,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 2137 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1102 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2022-07-23 06:29:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2022-07-23 06:29:47,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1325. [2022-07-23 06:29:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 861 states have (on average 1.7293844367015099) internal successors, (1489), 1061 states have internal predecessors, (1489), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-07-23 06:29:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1873 transitions. [2022-07-23 06:29:47,898 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1873 transitions. Word has length 89 [2022-07-23 06:29:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:47,898 INFO L495 AbstractCegarLoop]: Abstraction has 1325 states and 1873 transitions. [2022-07-23 06:29:47,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-23 06:29:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1873 transitions. [2022-07-23 06:29:47,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-23 06:29:47,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:47,899 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:47,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:48,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:48,117 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:29:48,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:48,119 INFO L85 PathProgramCache]: Analyzing trace with hash 228519725, now seen corresponding path program 1 times [2022-07-23 06:29:48,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:48,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37991737] [2022-07-23 06:29:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:48,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:48,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:48,121 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) [2022-07-23 06:29:48,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-23 06:29:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:49,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:29:49,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:50,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:50,181 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 [2022-07-23 06:29:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-23 06:29:50,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:54,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:54,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37991737] [2022-07-23 06:29:54,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37991737] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:54,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [937380216] [2022-07-23 06:29:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:54,577 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:29:54,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:29:54,579 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:29:54,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-07-23 06:29:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:56,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:29:56,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:57,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:57,510 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 [2022-07-23 06:29:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-23 06:29:57,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:59,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [937380216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:59,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:29:59,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-23 06:29:59,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764907377] [2022-07-23 06:29:59,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:29:59,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:29:59,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:59,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:29:59,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2022-07-23 06:29:59,920 INFO L87 Difference]: Start difference. First operand 1325 states and 1873 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-23 06:30:01,937 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:30:04,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:30:04,917 INFO L93 Difference]: Finished difference Result 1569 states and 1899 transitions. [2022-07-23 06:30:04,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:30:04,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2022-07-23 06:30:04,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:30:04,920 INFO L225 Difference]: With dead ends: 1569 [2022-07-23 06:30:04,920 INFO L226 Difference]: Without dead ends: 1569 [2022-07-23 06:30:04,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=33, Invalid=56, Unknown=1, NotChecked=0, Total=90 [2022-07-23 06:30:04,920 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 1388 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 93 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1388 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-07-23 06:30:04,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1388 Valid, 1877 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1251 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2022-07-23 06:30:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2022-07-23 06:30:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1323. [2022-07-23 06:30:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 861 states have (on average 1.727061556329849) internal successors, (1487), 1059 states have internal predecessors, (1487), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-07-23 06:30:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1871 transitions. [2022-07-23 06:30:04,945 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1871 transitions. Word has length 89 [2022-07-23 06:30:04,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:30:04,946 INFO L495 AbstractCegarLoop]: Abstraction has 1323 states and 1871 transitions. [2022-07-23 06:30:04,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-23 06:30:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1871 transitions. [2022-07-23 06:30:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-23 06:30:04,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:30:04,947 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:30:04,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-07-23 06:30:05,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-23 06:30:05,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:30:05,359 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting cdev_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:30:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:30:05,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1317347739, now seen corresponding path program 1 times [2022-07-23 06:30:05,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:30:05,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796716269] [2022-07-23 06:30:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:30:05,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:30:05,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:30:05,362 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) [2022-07-23 06:30:05,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-23 06:30:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:30:06,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:30:06,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:30:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-23 06:30:06,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:30:06,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:30:06,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796716269] [2022-07-23 06:30:06,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796716269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:30:06,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:30:06,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:30:06,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377769801] [2022-07-23 06:30:06,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:30:06,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:30:06,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:30:06,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:30:06,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:30:06,345 INFO L87 Difference]: Start difference. First operand 1323 states and 1871 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-23 06:30:08,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:30:10,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:30:12,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:30:12,447 INFO L93 Difference]: Finished difference Result 1498 states and 1883 transitions. [2022-07-23 06:30:12,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:30:12,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 96 [2022-07-23 06:30:12,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:30:12,450 INFO L225 Difference]: With dead ends: 1498 [2022-07-23 06:30:12,450 INFO L226 Difference]: Without dead ends: 1498 [2022-07-23 06:30:12,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:30:12,451 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 793 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:30:12,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 2200 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1094 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2022-07-23 06:30:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-07-23 06:30:12,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1321. [2022-07-23 06:30:12,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 861 states have (on average 1.7247386759581882) internal successors, (1485), 1057 states have internal predecessors, (1485), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-07-23 06:30:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1869 transitions. [2022-07-23 06:30:12,470 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1869 transitions. Word has length 96 [2022-07-23 06:30:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:30:12,471 INFO L495 AbstractCegarLoop]: Abstraction has 1321 states and 1869 transitions. [2022-07-23 06:30:12,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-23 06:30:12,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1869 transitions. [2022-07-23 06:30:12,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-23 06:30:12,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:30:12,472 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:30:12,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-23 06:30:12,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:30:12,688 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting cdev_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:30:12,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:30:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1317347738, now seen corresponding path program 1 times [2022-07-23 06:30:12,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:30:12,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952018601] [2022-07-23 06:30:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:30:12,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:30:12,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:30:12,691 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) [2022-07-23 06:30:12,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-23 06:30:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:30:14,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 06:30:14,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:30:14,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:14,952 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 [2022-07-23 06:30:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-23 06:30:15,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:30:17,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:30:17,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952018601] [2022-07-23 06:30:17,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952018601] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:30:17,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [209340043] [2022-07-23 06:30:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:30:17,933 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:30:17,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:30:17,934 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:30:17,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-07-23 06:30:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:30:20,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 06:30:20,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:30:20,822 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:30:20,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:30:20,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:30:21,413 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:30:21,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-07-23 06:30:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-23 06:30:21,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:30:21,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 06:30:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-23 06:30:23,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [209340043] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-23 06:30:23,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:30:23,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 17 [2022-07-23 06:30:23,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729800787] [2022-07-23 06:30:23,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:30:23,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 06:30:23,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:30:23,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 06:30:23,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-07-23 06:30:23,059 INFO L87 Difference]: Start difference. First operand 1321 states and 1869 transitions. Second operand has 9 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:30:25,076 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:30:27,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:30:29,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:30:31,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:30:40,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:30:40,320 INFO L93 Difference]: Finished difference Result 1373 states and 1878 transitions. [2022-07-23 06:30:40,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:30:40,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 96 [2022-07-23 06:30:40,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:30:40,324 INFO L225 Difference]: With dead ends: 1373 [2022-07-23 06:30:40,324 INFO L226 Difference]: Without dead ends: 1373 [2022-07-23 06:30:40,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-07-23 06:30:40,324 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 222 mSDsluCounter, 3614 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 11 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 4361 SdHoareTripleChecker+Invalid, 1943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:30:40,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 4361 Invalid, 1943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1928 Invalid, 4 Unknown, 0 Unchecked, 17.1s Time] [2022-07-23 06:30:40,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2022-07-23 06:30:40,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1320. [2022-07-23 06:30:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 861 states have (on average 1.7235772357723578) internal successors, (1484), 1056 states have internal predecessors, (1484), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-07-23 06:30:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1868 transitions. [2022-07-23 06:30:40,338 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1868 transitions. Word has length 96 [2022-07-23 06:30:40,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:30:40,338 INFO L495 AbstractCegarLoop]: Abstraction has 1320 states and 1868 transitions. [2022-07-23 06:30:40,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:30:40,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1868 transitions. [2022-07-23 06:30:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-23 06:30:40,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:30:40,339 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:30:40,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-07-23 06:30:40,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-07-23 06:30:40,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:30:40,755 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting cdev_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:30:40,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:30:40,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2111894061, now seen corresponding path program 1 times [2022-07-23 06:30:40,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:30:40,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689058079] [2022-07-23 06:30:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:30:40,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:30:40,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:30:40,758 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) [2022-07-23 06:30:40,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-23 06:30:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:30:42,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 06:30:42,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:30:43,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:43,348 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 [2022-07-23 06:30:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-23 06:30:43,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:30:44,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:30:44,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689058079] [2022-07-23 06:30:44,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689058079] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:30:44,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2018751190] [2022-07-23 06:30:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:30:44,645 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:30:44,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:30:44,646 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:30:44,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-07-23 06:30:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:30:47,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 06:30:47,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:30:47,788 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:30:47,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:30:47,975 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 [2022-07-23 06:30:48,408 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:30:48,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-07-23 06:30:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-23 06:30:48,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:30:49,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 06:30:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-23 06:30:50,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2018751190] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-23 06:30:50,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:30:50,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 17 [2022-07-23 06:30:50,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012235306] [2022-07-23 06:30:50,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:30:50,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 06:30:50,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:30:50,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 06:30:50,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-07-23 06:30:50,367 INFO L87 Difference]: Start difference. First operand 1320 states and 1868 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:30:52,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:30:54,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []