./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw_p.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw_p.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 cd6b300b335accb35f3a48bfd0f387908f589dfb4e32ea4d19ee0b855e6625b4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 19:07:46,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 19:07:46,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 19:07:46,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 19:07:46,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 19:07:46,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 19:07:46,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 19:07:46,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 19:07:46,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 19:07:46,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 19:07:46,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 19:07:46,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 19:07:46,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 19:07:46,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 19:07:46,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 19:07:46,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 19:07:46,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 19:07:46,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 19:07:46,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 19:07:46,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 19:07:46,613 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 19:07:46,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 19:07:46,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 19:07:46,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 19:07:46,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 19:07:46,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 19:07:46,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 19:07:46,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 19:07:46,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 19:07:46,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 19:07:46,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 19:07:46,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 19:07:46,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 19:07:46,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 19:07:46,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 19:07:46,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 19:07:46,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 19:07:46,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 19:07:46,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 19:07:46,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 19:07:46,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 19:07:46,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 19:07:46,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 19:07:46,651 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 19:07:46,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 19:07:46,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 19:07:46,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 19:07:46,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 19:07:46,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 19:07:46,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 19:07:46,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 19:07:46,653 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 19:07:46,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 19:07:46,654 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 19:07:46,654 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 19:07:46,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 19:07:46,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 19:07:46,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 19:07:46,654 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 19:07:46,654 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 19:07:46,655 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 19:07:46,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 19:07:46,656 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 19:07:46,656 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 19:07:46,656 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 19:07:46,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 19:07:46,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 19:07:46,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 19:07:46,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:07:46,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 19:07:46,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 19:07:46,657 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 19:07:46,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 19:07:46,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd6b300b335accb35f3a48bfd0f387908f589dfb4e32ea4d19ee0b855e6625b4 [2022-07-12 19:07:46,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 19:07:46,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 19:07:46,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 19:07:46,843 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 19:07:46,843 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 19:07:46,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw_p.i [2022-07-12 19:07:46,892 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a70227d79/4c925861a5af4b72aea69f40fd4da525/FLAGe72a945c6 [2022-07-12 19:07:47,365 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 19:07:47,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw_p.i [2022-07-12 19:07:47,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a70227d79/4c925861a5af4b72aea69f40fd4da525/FLAGe72a945c6 [2022-07-12 19:07:47,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a70227d79/4c925861a5af4b72aea69f40fd4da525 [2022-07-12 19:07:47,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 19:07:47,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 19:07:47,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 19:07:47,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 19:07:47,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 19:07:47,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:07:47" (1/1) ... [2022-07-12 19:07:47,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5949061f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:47, skipping insertion in model container [2022-07-12 19:07:47,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:07:47" (1/1) ... [2022-07-12 19:07:47,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 19:07:47,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 19:07:47,590 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_inw_p.i[457,470] [2022-07-12 19:07:48,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:07:48,157 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-12 19:07:48,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@57efba03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:48, skipping insertion in model container [2022-07-12 19:07:48,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 19:07:48,158 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-12 19:07:48,159 INFO L158 Benchmark]: Toolchain (without parser) took 759.38ms. Allocated memory is still 98.6MB. Free memory was 60.1MB in the beginning and 46.6MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-12 19:07:48,160 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 98.6MB. Free memory was 78.2MB in the beginning and 78.2MB in the end (delta: 24.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 19:07:48,160 INFO L158 Benchmark]: CACSL2BoogieTranslator took 757.71ms. Allocated memory is still 98.6MB. Free memory was 59.9MB in the beginning and 46.6MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-12 19:07:48,161 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 98.6MB. Free memory was 78.2MB in the beginning and 78.2MB in the end (delta: 24.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 757.71ms. Allocated memory is still 98.6MB. Free memory was 59.9MB in the beginning and 46.6MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. 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_inw_p.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 cd6b300b335accb35f3a48bfd0f387908f589dfb4e32ea4d19ee0b855e6625b4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 19:07:49,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 19:07:49,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 19:07:49,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 19:07:49,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 19:07:49,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 19:07:49,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 19:07:49,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 19:07:49,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 19:07:49,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 19:07:49,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 19:07:49,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 19:07:49,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 19:07:49,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 19:07:49,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 19:07:49,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 19:07:49,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 19:07:49,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 19:07:49,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 19:07:49,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 19:07:49,671 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 19:07:49,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 19:07:49,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 19:07:49,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 19:07:49,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 19:07:49,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 19:07:49,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 19:07:49,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 19:07:49,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 19:07:49,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 19:07:49,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 19:07:49,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 19:07:49,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 19:07:49,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 19:07:49,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 19:07:49,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 19:07:49,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 19:07:49,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 19:07:49,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 19:07:49,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 19:07:49,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 19:07:49,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 19:07:49,685 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-12 19:07:49,712 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 19:07:49,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 19:07:49,712 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 19:07:49,712 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 19:07:49,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 19:07:49,713 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 19:07:49,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 19:07:49,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 19:07:49,714 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 19:07:49,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 19:07:49,715 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 19:07:49,715 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 19:07:49,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 19:07:49,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 19:07:49,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 19:07:49,716 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 19:07:49,716 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 19:07:49,716 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 19:07:49,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 19:07:49,716 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 19:07:49,716 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 19:07:49,717 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 19:07:49,717 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 19:07:49,717 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 19:07:49,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 19:07:49,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 19:07:49,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 19:07:49,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:07:49,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 19:07:49,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 19:07:49,718 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 19:07:49,718 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 19:07:49,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 19:07:49,719 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd6b300b335accb35f3a48bfd0f387908f589dfb4e32ea4d19ee0b855e6625b4 [2022-07-12 19:07:49,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 19:07:49,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 19:07:49,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 19:07:49,959 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 19:07:49,959 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 19:07:49,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw_p.i [2022-07-12 19:07:50,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5d2a8e12/ff649c1f428c446eb2b0b9273ee83bf1/FLAGf30166de3 [2022-07-12 19:07:50,477 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 19:07:50,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw_p.i [2022-07-12 19:07:50,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5d2a8e12/ff649c1f428c446eb2b0b9273ee83bf1/FLAGf30166de3 [2022-07-12 19:07:50,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5d2a8e12/ff649c1f428c446eb2b0b9273ee83bf1 [2022-07-12 19:07:50,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 19:07:50,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 19:07:50,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 19:07:50,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 19:07:50,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 19:07:50,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:07:50" (1/1) ... [2022-07-12 19:07:50,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b781dbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:50, skipping insertion in model container [2022-07-12 19:07:50,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:07:50" (1/1) ... [2022-07-12 19:07:50,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 19:07:50,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 19:07:50,974 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_inw_p.i[457,470] [2022-07-12 19:07:51,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:07:51,530 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-12 19:07:51,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 19:07:51,560 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_inw_p.i[457,470] [2022-07-12 19:07:51,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:07:51,729 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 19:07:51,736 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_inw_p.i[457,470] [2022-07-12 19:07:51,847 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:07:51,952 INFO L208 MainTranslator]: Completed translation [2022-07-12 19:07:51,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:51 WrapperNode [2022-07-12 19:07:51,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 19:07:51,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 19:07:51,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 19:07:51,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 19:07:51,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:51" (1/1) ... [2022-07-12 19:07:52,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:51" (1/1) ... [2022-07-12 19:07:52,073 INFO L137 Inliner]: procedures = 482, calls = 839, calls flagged for inlining = 54, calls inlined = 37, statements flattened = 970 [2022-07-12 19:07:52,073 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 19:07:52,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 19:07:52,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 19:07:52,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 19:07:52,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:51" (1/1) ... [2022-07-12 19:07:52,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:51" (1/1) ... [2022-07-12 19:07:52,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:51" (1/1) ... [2022-07-12 19:07:52,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:51" (1/1) ... [2022-07-12 19:07:52,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:51" (1/1) ... [2022-07-12 19:07:52,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:51" (1/1) ... [2022-07-12 19:07:52,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:51" (1/1) ... [2022-07-12 19:07:52,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 19:07:52,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 19:07:52,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 19:07:52,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 19:07:52,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:51" (1/1) ... [2022-07-12 19:07:52,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:07:52,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:07:52,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 19:07:52,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 19:07:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure zf_timer_off [2022-07-12 19:07:52,219 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_timer_off [2022-07-12 19:07:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2022-07-12 19:07:52,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2022-07-12 19:07:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 19:07:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_begin [2022-07-12 19:07:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-07-12 19:07:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-07-12 19:07:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 19:07:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-07-12 19:07:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-12 19:07:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-07-12 19:07:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-07-12 19:07:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-07-12 19:07:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 19:07:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_end [2022-07-12 19:07:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure zf_get_control [2022-07-12 19:07:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_get_control [2022-07-12 19:07:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2022-07-12 19:07:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2022-07-12 19:07:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 19:07:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure request_region [2022-07-12 19:07:52,222 INFO L138 BoogieDeclarations]: Found implementation of procedure request_region [2022-07-12 19:07:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 19:07:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 19:07:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-07-12 19:07:52,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-07-12 19:07:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irqsave [2022-07-12 19:07:52,222 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irqsave [2022-07-12 19:07:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure release_region [2022-07-12 19:07:52,223 INFO L138 BoogieDeclarations]: Found implementation of procedure release_region [2022-07-12 19:07:52,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 19:07:52,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 19:07:52,223 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_init [2022-07-12 19:07:52,223 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_init [2022-07-12 19:07:52,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-07-12 19:07:52,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-12 19:07:52,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-07-12 19:07:52,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-12 19:07:52,224 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-12 19:07:52,224 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-12 19:07:52,224 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2022-07-12 19:07:52,224 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2022-07-12 19:07:52,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 19:07:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 19:07:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2022-07-12 19:07:52,225 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2022-07-12 19:07:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-07-12 19:07:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_add [2022-07-12 19:07:52,226 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_add [2022-07-12 19:07:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-07-12 19:07:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-07-12 19:07:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-12 19:07:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 19:07:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2022-07-12 19:07:52,227 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2022-07-12 19:07:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2022-07-12 19:07:52,228 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2022-07-12 19:07:52,228 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-07-12 19:07:52,228 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-07-12 19:07:52,228 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2022-07-12 19:07:52,228 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2022-07-12 19:07:52,228 INFO L130 BoogieDeclarations]: Found specification of procedure assert_context_process [2022-07-12 19:07:52,228 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_context_process [2022-07-12 19:07:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure zf_set_control [2022-07-12 19:07:52,229 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_set_control [2022-07-12 19:07:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2022-07-12 19:07:52,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2022-07-12 19:07:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure zf_readw [2022-07-12 19:07:52,229 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_readw [2022-07-12 19:07:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-07-12 19:07:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure zf_ping [2022-07-12 19:07:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_ping [2022-07-12 19:07:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-07-12 19:07:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-07-12 19:07:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2022-07-12 19:07:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2022-07-12 19:07:52,504 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 19:07:52,506 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 19:07:56,464 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 19:07:56,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 19:07:56,471 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 19:07:56,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:07:56 BoogieIcfgContainer [2022-07-12 19:07:56,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 19:07:56,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 19:07:56,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 19:07:56,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 19:07:56,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 07:07:50" (1/3) ... [2022-07-12 19:07:56,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d01e80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:07:56, skipping insertion in model container [2022-07-12 19:07:56,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:07:51" (2/3) ... [2022-07-12 19:07:56,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d01e80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:07:56, skipping insertion in model container [2022-07-12 19:07:56,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:07:56" (3/3) ... [2022-07-12 19:07:56,478 INFO L111 eAbstractionObserver]: Analyzing ICFG ddv_machzwd_inw_p.i [2022-07-12 19:07:56,486 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 19:07:56,487 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 205 error locations. [2022-07-12 19:07:56,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 19:07:56,527 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@128ddf57, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6d5cf05a [2022-07-12 19:07:56,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 205 error locations. [2022-07-12 19:07:56,537 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) [2022-07-12 19:07:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-12 19:07:56,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:07:56,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-12 19:07:56,542 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)] === [2022-07-12 19:07:56,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:07:56,547 INFO L85 PathProgramCache]: Analyzing trace with hash 333908101, now seen corresponding path program 1 times [2022-07-12 19:07:56,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:07:56,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501360819] [2022-07-12 19:07:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:07:56,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:07:56,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:07:56,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:07:56,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 19:07:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:07:56,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:07:56,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:07:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:07:56,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:07:56,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:07:56,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501360819] [2022-07-12 19:07:56,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501360819] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:07:56,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:07:56,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:07:56,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232620922] [2022-07-12 19:07:56,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:07:56,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:07:56,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:07:56,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:07:56,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:07:56,963 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) [2022-07-12 19:07:58,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:08:00,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:08:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:08:02,946 INFO L93 Difference]: Finished difference Result 1204 states and 1443 transitions. [2022-07-12 19:08:02,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:08:02,948 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 [2022-07-12 19:08:02,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:08:02,959 INFO L225 Difference]: With dead ends: 1204 [2022-07-12 19:08:02,959 INFO L226 Difference]: Without dead ends: 1200 [2022-07-12 19:08:02,960 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 [2022-07-12 19:08:02,962 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 687 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s 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 [2022-07-12 19:08:02,962 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] [2022-07-12 19:08:02,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-07-12 19:08:03,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 987. [2022-07-12 19:08:03,052 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) [2022-07-12 19:08:03,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1347 transitions. [2022-07-12 19:08:03,061 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1347 transitions. Word has length 5 [2022-07-12 19:08:03,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:08:03,061 INFO L495 AbstractCegarLoop]: Abstraction has 987 states and 1347 transitions. [2022-07-12 19:08:03,064 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) [2022-07-12 19:08:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1347 transitions. [2022-07-12 19:08:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-12 19:08:03,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:08:03,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-12 19:08:03,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-12 19:08:03,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:08:03,275 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)] === [2022-07-12 19:08:03,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:08:03,276 INFO L85 PathProgramCache]: Analyzing trace with hash 333908102, now seen corresponding path program 1 times [2022-07-12 19:08:03,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:08:03,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791452424] [2022-07-12 19:08:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:08:03,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:08:03,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:08:03,278 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:08:03,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 19:08:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:08:03,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 19:08:03,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:08:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:08:03,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:08:03,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:08:03,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791452424] [2022-07-12 19:08:03,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791452424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:08:03,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:08:03,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:08:03,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990474545] [2022-07-12 19:08:03,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:08:03,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:08:03,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:08:03,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:08:03,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:08:03,643 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) [2022-07-12 19:08:05,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:08:07,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:08:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:08:09,361 INFO L93 Difference]: Finished difference Result 1119 states and 1439 transitions. [2022-07-12 19:08:09,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:08:09,362 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 [2022-07-12 19:08:09,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:08:09,367 INFO L225 Difference]: With dead ends: 1119 [2022-07-12 19:08:09,367 INFO L226 Difference]: Without dead ends: 1119 [2022-07-12 19:08:09,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:08:09,368 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, 5.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:08:09,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 2630 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 850 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-07-12 19:08:09,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-07-12 19:08:09,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1060. [2022-07-12 19:08:09,404 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) [2022-07-12 19:08:09,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1435 transitions. [2022-07-12 19:08:09,408 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1435 transitions. Word has length 5 [2022-07-12 19:08:09,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:08:09,408 INFO L495 AbstractCegarLoop]: Abstraction has 1060 states and 1435 transitions. [2022-07-12 19:08:09,408 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) [2022-07-12 19:08:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1435 transitions. [2022-07-12 19:08:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 19:08:09,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:08:09,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:08:09,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 19:08:09,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:08:09,619 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)] === [2022-07-12 19:08:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:08:09,620 INFO L85 PathProgramCache]: Analyzing trace with hash -863937403, now seen corresponding path program 1 times [2022-07-12 19:08:09,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:08:09,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199893405] [2022-07-12 19:08:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:08:09,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:08:09,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:08:09,622 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:08:09,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 19:08:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:08:09,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 19:08:09,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:08:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:08:09,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:08:09,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:08:09,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199893405] [2022-07-12 19:08:09,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199893405] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:08:09,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:08:09,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-12 19:08:09,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284525966] [2022-07-12 19:08:09,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:08:09,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:08:09,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:08:09,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:08:09,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:08:09,949 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) [2022-07-12 19:08:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:08:10,927 INFO L93 Difference]: Finished difference Result 1266 states and 1522 transitions. [2022-07-12 19:08:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:08:10,927 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 [2022-07-12 19:08:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:08:10,931 INFO L225 Difference]: With dead ends: 1266 [2022-07-12 19:08:10,931 INFO L226 Difference]: Without dead ends: 1266 [2022-07-12 19:08:10,932 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 [2022-07-12 19:08:10,932 INFO L413 NwaCegarLoop]: 742 mSDtfsCounter, 660 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 19:08:10,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 1290 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 19:08:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2022-07-12 19:08:10,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1059. [2022-07-12 19:08:10,965 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) [2022-07-12 19:08:10,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1430 transitions. [2022-07-12 19:08:10,972 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1430 transitions. Word has length 11 [2022-07-12 19:08:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:08:10,972 INFO L495 AbstractCegarLoop]: Abstraction has 1059 states and 1430 transitions. [2022-07-12 19:08:10,972 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) [2022-07-12 19:08:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1430 transitions. [2022-07-12 19:08:10,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 19:08:10,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:08:10,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:08:10,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-12 19:08:11,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:08:11,184 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)] === [2022-07-12 19:08:11,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:08:11,184 INFO L85 PathProgramCache]: Analyzing trace with hash -863937402, now seen corresponding path program 1 times [2022-07-12 19:08:11,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:08:11,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104285505] [2022-07-12 19:08:11,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:08:11,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:08:11,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:08:11,186 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:08:11,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 19:08:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:08:11,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:08:11,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:08:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:08:11,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:08:11,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:08:11,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104285505] [2022-07-12 19:08:11,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104285505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:08:11,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:08:11,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:08:11,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132647425] [2022-07-12 19:08:11,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:08:11,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:08:11,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:08:11,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:08:11,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:08:11,553 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) [2022-07-12 19:08:13,571 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 [] [2022-07-12 19:08:14,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:08:14,717 INFO L93 Difference]: Finished difference Result 1125 states and 1445 transitions. [2022-07-12 19:08:14,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:08:14,718 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 [2022-07-12 19:08:14,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:08:14,721 INFO L225 Difference]: With dead ends: 1125 [2022-07-12 19:08:14,721 INFO L226 Difference]: Without dead ends: 1125 [2022-07-12 19:08:14,721 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 [2022-07-12 19:08:14,722 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, 3.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:08:14,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1514 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 410 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-07-12 19:08:14,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-07-12 19:08:14,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1062. [2022-07-12 19:08:14,737 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) [2022-07-12 19:08:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1433 transitions. [2022-07-12 19:08:14,740 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1433 transitions. Word has length 11 [2022-07-12 19:08:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:08:14,740 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1433 transitions. [2022-07-12 19:08:14,740 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) [2022-07-12 19:08:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1433 transitions. [2022-07-12 19:08:14,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 19:08:14,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:08:14,741 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:08:14,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-12 19:08:14,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:08:14,952 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)] === [2022-07-12 19:08:14,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:08:14,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2114831441, now seen corresponding path program 1 times [2022-07-12 19:08:14,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:08:14,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551440946] [2022-07-12 19:08:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:08:14,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:08:14,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:08:14,955 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:08:14,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 19:08:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:08:15,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 19:08:15,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:08:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:08:15,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:08:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:08:15,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:08:15,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551440946] [2022-07-12 19:08:15,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551440946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:08:15,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:08:15,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2022-07-12 19:08:15,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346088346] [2022-07-12 19:08:15,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:08:15,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 19:08:15,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:08:15,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 19:08:15,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:08:15,600 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) [2022-07-12 19:08:17,616 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 [] [2022-07-12 19:08:19,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:08:21,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:08:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:08:26,836 INFO L93 Difference]: Finished difference Result 1335 states and 1679 transitions. [2022-07-12 19:08:26,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 19:08:26,837 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 [2022-07-12 19:08:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:08:26,841 INFO L225 Difference]: With dead ends: 1335 [2022-07-12 19:08:26,841 INFO L226 Difference]: Without dead ends: 1335 [2022-07-12 19:08:26,841 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 [2022-07-12 19:08:26,842 INFO L413 NwaCegarLoop]: 838 mSDtfsCounter, 863 mSDsluCounter, 2512 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 125 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s 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, 10.9s IncrementalHoareTripleChecker+Time [2022-07-12 19:08:26,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [875 Valid, 3350 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1547 Invalid, 3 Unknown, 0 Unchecked, 10.9s Time] [2022-07-12 19:08:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2022-07-12 19:08:26,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1209. [2022-07-12 19:08:26,871 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) [2022-07-12 19:08:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1659 transitions. [2022-07-12 19:08:26,874 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1659 transitions. Word has length 14 [2022-07-12 19:08:26,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:08:26,875 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 1659 transitions. [2022-07-12 19:08:26,875 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) [2022-07-12 19:08:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1659 transitions. [2022-07-12 19:08:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 19:08:26,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:08:26,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:08:26,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-12 19:08:27,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:08:27,086 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)] === [2022-07-12 19:08:27,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:08:27,087 INFO L85 PathProgramCache]: Analyzing trace with hash -846555216, now seen corresponding path program 1 times [2022-07-12 19:08:27,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:08:27,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140278202] [2022-07-12 19:08:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:08:27,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:08:27,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:08:27,089 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:08:27,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 19:08:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:08:27,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 19:08:27,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:08:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:08:27,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:08:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:08:27,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:08:27,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140278202] [2022-07-12 19:08:27,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140278202] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:08:27,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:08:27,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-12 19:08:27,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193156430] [2022-07-12 19:08:27,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:08:27,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 19:08:27,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:08:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 19:08:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:08:27,465 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) [2022-07-12 19:08:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:08:27,680 INFO L93 Difference]: Finished difference Result 1215 states and 1663 transitions. [2022-07-12 19:08:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 19:08:27,681 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 [2022-07-12 19:08:27,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:08:27,685 INFO L225 Difference]: With dead ends: 1215 [2022-07-12 19:08:27,685 INFO L226 Difference]: Without dead ends: 1215 [2022-07-12 19:08:27,685 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 [2022-07-12 19:08:27,685 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 442 mSDsluCounter, 2810 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-12 19:08:27,685 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] [2022-07-12 19:08:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-07-12 19:08:27,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1214. [2022-07-12 19:08:27,702 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) [2022-07-12 19:08:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1663 transitions. [2022-07-12 19:08:27,705 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1663 transitions. Word has length 19 [2022-07-12 19:08:27,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:08:27,705 INFO L495 AbstractCegarLoop]: Abstraction has 1214 states and 1663 transitions. [2022-07-12 19:08:27,705 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) [2022-07-12 19:08:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1663 transitions. [2022-07-12 19:08:27,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 19:08:27,706 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:08:27,706 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:08:27,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-12 19:08:27,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:08:27,917 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)] === [2022-07-12 19:08:27,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:08:27,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1706941254, now seen corresponding path program 2 times [2022-07-12 19:08:27,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:08:27,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149895325] [2022-07-12 19:08:27,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 19:08:27,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:08:27,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:08:27,920 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:08:27,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 19:08:28,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 19:08:28,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 19:08:28,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 19:08:28,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:08:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:08:28,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:08:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:08:29,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:08:29,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149895325] [2022-07-12 19:08:29,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149895325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:08:29,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:08:29,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2022-07-12 19:08:29,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018467786] [2022-07-12 19:08:29,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:08:29,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 19:08:29,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:08:29,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 19:08:29,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-12 19:08:29,316 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) [2022-07-12 19:08:31,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:08:33,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:08:35,348 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 [] [2022-07-12 19:08:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:08:45,824 INFO L93 Difference]: Finished difference Result 1341 states and 1697 transitions. [2022-07-12 19:08:45,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 19:08:45,825 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 [2022-07-12 19:08:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:08:45,844 INFO L225 Difference]: With dead ends: 1341 [2022-07-12 19:08:45,845 INFO L226 Difference]: Without dead ends: 1341 [2022-07-12 19:08:45,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2022-07-12 19:08:45,846 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 1112 mSDsluCounter, 4369 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 202 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s 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, 15.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:08:45,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 5195 Invalid, 2762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2557 Invalid, 3 Unknown, 0 Unchecked, 15.3s Time] [2022-07-12 19:08:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-07-12 19:08:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1227. [2022-07-12 19:08:45,863 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) [2022-07-12 19:08:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1679 transitions. [2022-07-12 19:08:45,866 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1679 transitions. Word has length 23 [2022-07-12 19:08:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:08:45,867 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 1679 transitions. [2022-07-12 19:08:45,867 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) [2022-07-12 19:08:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1679 transitions. [2022-07-12 19:08:45,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 19:08:45,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:08:45,868 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:08:45,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-12 19:08:46,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:08:46,080 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)] === [2022-07-12 19:08:46,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:08:46,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1287411312, now seen corresponding path program 2 times [2022-07-12 19:08:46,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:08:46,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101962372] [2022-07-12 19:08:46,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 19:08:46,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:08:46,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:08:46,083 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:08:46,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-12 19:08:46,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 19:08:46,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 19:08:46,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 19:08:46,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:08:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-12 19:08:46,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:08:46,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:08:46,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101962372] [2022-07-12 19:08:46,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101962372] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:08:46,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:08:46,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-12 19:08:46,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868964528] [2022-07-12 19:08:46,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:08:46,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:08:46,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:08:46,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:08:46,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:08:46,504 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) [2022-07-12 19:08:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:08:47,379 INFO L93 Difference]: Finished difference Result 1435 states and 1772 transitions. [2022-07-12 19:08:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:08:47,379 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 [2022-07-12 19:08:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:08:47,383 INFO L225 Difference]: With dead ends: 1435 [2022-07-12 19:08:47,383 INFO L226 Difference]: Without dead ends: 1435 [2022-07-12 19:08:47,383 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 [2022-07-12 19:08:47,383 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 646 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 19:08:47,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 1288 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 19:08:47,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2022-07-12 19:08:47,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1225. [2022-07-12 19:08:47,398 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) [2022-07-12 19:08:47,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1670 transitions. [2022-07-12 19:08:47,401 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1670 transitions. Word has length 31 [2022-07-12 19:08:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:08:47,401 INFO L495 AbstractCegarLoop]: Abstraction has 1225 states and 1670 transitions. [2022-07-12 19:08:47,401 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) [2022-07-12 19:08:47,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1670 transitions. [2022-07-12 19:08:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 19:08:47,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:08:47,404 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:08:47,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-12 19:08:47,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:08:47,614 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)] === [2022-07-12 19:08:47,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:08:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1287411313, now seen corresponding path program 1 times [2022-07-12 19:08:47,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:08:47,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057618037] [2022-07-12 19:08:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:08:47,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:08:47,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:08:47,616 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) [2022-07-12 19:08:47,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-12 19:08:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:08:47,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 19:08:47,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:08:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:08:48,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:08:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:08:48,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:08:48,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057618037] [2022-07-12 19:08:48,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057618037] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:08:48,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:08:48,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-12 19:08:48,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456018338] [2022-07-12 19:08:48,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:08:48,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 19:08:48,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:08:48,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 19:08:48,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-12 19:08:48,143 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) [2022-07-12 19:08:48,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:08:48,561 INFO L93 Difference]: Finished difference Result 1225 states and 1666 transitions. [2022-07-12 19:08:48,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 19:08:48,562 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 [2022-07-12 19:08:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:08:48,565 INFO L225 Difference]: With dead ends: 1225 [2022-07-12 19:08:48,565 INFO L226 Difference]: Without dead ends: 1225 [2022-07-12 19:08:48,566 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 [2022-07-12 19:08:48,566 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 868 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-07-12 19:08:48,566 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] [2022-07-12 19:08:48,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-07-12 19:08:48,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1225. [2022-07-12 19:08:48,579 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) [2022-07-12 19:08:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1666 transitions. [2022-07-12 19:08:48,581 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1666 transitions. Word has length 31 [2022-07-12 19:08:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:08:48,582 INFO L495 AbstractCegarLoop]: Abstraction has 1225 states and 1666 transitions. [2022-07-12 19:08:48,582 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) [2022-07-12 19:08:48,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1666 transitions. [2022-07-12 19:08:48,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 19:08:48,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:08:48,585 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:08:48,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-12 19:08:48,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:08:48,796 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)] === [2022-07-12 19:08:48,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:08:48,796 INFO L85 PathProgramCache]: Analyzing trace with hash 338189670, now seen corresponding path program 3 times [2022-07-12 19:08:48,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:08:48,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148777674] [2022-07-12 19:08:48,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 19:08:48,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:08:48,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:08:48,798 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:08:48,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-12 19:08:49,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-12 19:08:49,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 19:08:49,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 19:08:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:08:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:08:50,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:08:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:08:52,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:08:52,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148777674] [2022-07-12 19:08:52,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148777674] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:08:52,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:08:52,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2022-07-12 19:08:52,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024581144] [2022-07-12 19:08:52,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:08:52,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 19:08:52,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:08:52,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 19:08:52,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-07-12 19:08:52,003 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) [2022-07-12 19:08:54,020 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 [] [2022-07-12 19:08:56,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:08:58,033 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:09:00,042 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:09:02,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:09:04,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:09:06,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:09:08,075 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 [] [2022-07-12 19:09:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:31,998 INFO L93 Difference]: Finished difference Result 1574 states and 1894 transitions. [2022-07-12 19:09:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 19:09:31,999 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 [2022-07-12 19:09:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:32,002 INFO L225 Difference]: With dead ends: 1574 [2022-07-12 19:09:32,002 INFO L226 Difference]: Without dead ends: 1574 [2022-07-12 19:09:32,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2022-07-12 19:09:32,003 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 2005 mSDsluCounter, 8344 mSDsCounter, 0 mSdLazyCounter, 5799 mSolverCounterSat, 226 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.5s 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, 39.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:32,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2017 Valid, 9096 Invalid, 6033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 5799 Invalid, 8 Unknown, 0 Unchecked, 39.3s Time] [2022-07-12 19:09:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2022-07-12 19:09:32,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1223. [2022-07-12 19:09:32,018 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) [2022-07-12 19:09:32,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1663 transitions. [2022-07-12 19:09:32,024 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1663 transitions. Word has length 41 [2022-07-12 19:09:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:32,024 INFO L495 AbstractCegarLoop]: Abstraction has 1223 states and 1663 transitions. [2022-07-12 19:09:32,024 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) [2022-07-12 19:09:32,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1663 transitions. [2022-07-12 19:09:32,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 19:09:32,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:32,029 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:32,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:32,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:32,241 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)] === [2022-07-12 19:09:32,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:32,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1417284303, now seen corresponding path program 2 times [2022-07-12 19:09:32,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:32,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113587356] [2022-07-12 19:09:32,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 19:09:32,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:32,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:32,243 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:32,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-12 19:09:32,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 19:09:32,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 19:09:32,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:09:32,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 19:09:32,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:09:32,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:32,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113587356] [2022-07-12 19:09:32,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113587356] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:32,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:32,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:09:32,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616742365] [2022-07-12 19:09:32,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:32,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:09:32,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:32,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:09:32,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:09:32,794 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) [2022-07-12 19:09:34,811 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 [] [2022-07-12 19:09:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:35,895 INFO L93 Difference]: Finished difference Result 1279 states and 1675 transitions. [2022-07-12 19:09:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:09:35,896 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 [2022-07-12 19:09:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:35,899 INFO L225 Difference]: With dead ends: 1279 [2022-07-12 19:09:35,899 INFO L226 Difference]: Without dead ends: 1279 [2022-07-12 19:09:35,899 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 [2022-07-12 19:09:35,900 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 237 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s 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, 3.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:35,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 1498 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 404 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-07-12 19:09:35,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-07-12 19:09:35,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1221. [2022-07-12 19:09:35,912 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) [2022-07-12 19:09:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1661 transitions. [2022-07-12 19:09:35,914 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1661 transitions. Word has length 43 [2022-07-12 19:09:35,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:35,915 INFO L495 AbstractCegarLoop]: Abstraction has 1221 states and 1661 transitions. [2022-07-12 19:09:35,915 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) [2022-07-12 19:09:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1661 transitions. [2022-07-12 19:09:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 19:09:35,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:35,916 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] [2022-07-12 19:09:35,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:36,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:36,127 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)] === [2022-07-12 19:09:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:36,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1129900010, now seen corresponding path program 1 times [2022-07-12 19:09:36,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:36,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50868983] [2022-07-12 19:09:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:36,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:36,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:36,129 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) [2022-07-12 19:09:36,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-12 19:09:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:36,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 19:09:36,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:36,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 19:09:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-12 19:09:36,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:09:36,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:36,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50868983] [2022-07-12 19:09:36,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50868983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:36,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:36,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:09:36,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030987685] [2022-07-12 19:09:36,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:36,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:09:36,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:36,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:09:36,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:09:36,591 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) [2022-07-12 19:09:38,607 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 [] [2022-07-12 19:09:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:39,093 INFO L93 Difference]: Finished difference Result 1220 states and 1660 transitions. [2022-07-12 19:09:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:09:39,093 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 [2022-07-12 19:09:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:39,097 INFO L225 Difference]: With dead ends: 1220 [2022-07-12 19:09:39,097 INFO L226 Difference]: Without dead ends: 1220 [2022-07-12 19:09:39,097 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 [2022-07-12 19:09:39,097 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 2 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s 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, 2.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:39,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1363 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-07-12 19:09:39,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-07-12 19:09:39,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1220. [2022-07-12 19:09:39,110 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) [2022-07-12 19:09:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1660 transitions. [2022-07-12 19:09:39,112 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1660 transitions. Word has length 67 [2022-07-12 19:09:39,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:39,112 INFO L495 AbstractCegarLoop]: Abstraction has 1220 states and 1660 transitions. [2022-07-12 19:09:39,113 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) [2022-07-12 19:09:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1660 transitions. [2022-07-12 19:09:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 19:09:39,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:39,113 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] [2022-07-12 19:09:39,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:39,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:39,327 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)] === [2022-07-12 19:09:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:39,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1129900011, now seen corresponding path program 1 times [2022-07-12 19:09:39,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:39,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49816806] [2022-07-12 19:09:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:39,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:39,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:39,335 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:39,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-12 19:09:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:39,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 19:09:39,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:39,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 19:09:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-12 19:09:39,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:09:39,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:39,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49816806] [2022-07-12 19:09:39,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49816806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:39,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:39,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:09:39,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554834829] [2022-07-12 19:09:39,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:39,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:09:39,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:39,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:09:39,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:09:39,884 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) [2022-07-12 19:09:41,902 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 [] [2022-07-12 19:09:42,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:42,632 INFO L93 Difference]: Finished difference Result 1219 states and 1658 transitions. [2022-07-12 19:09:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:09:42,633 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 [2022-07-12 19:09:42,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:42,636 INFO L225 Difference]: With dead ends: 1219 [2022-07-12 19:09:42,636 INFO L226 Difference]: Without dead ends: 1219 [2022-07-12 19:09:42,636 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 [2022-07-12 19:09:42,637 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 749 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s 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, 2.7s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:42,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 1362 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-07-12 19:09:42,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-07-12 19:09:42,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1219. [2022-07-12 19:09:42,650 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) [2022-07-12 19:09:42,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1658 transitions. [2022-07-12 19:09:42,652 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1658 transitions. Word has length 67 [2022-07-12 19:09:42,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:42,652 INFO L495 AbstractCegarLoop]: Abstraction has 1219 states and 1658 transitions. [2022-07-12 19:09:42,652 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) [2022-07-12 19:09:42,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1658 transitions. [2022-07-12 19:09:42,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 19:09:42,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:42,653 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] [2022-07-12 19:09:42,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:42,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:42,866 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)] === [2022-07-12 19:09:42,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:42,866 INFO L85 PathProgramCache]: Analyzing trace with hash -366255816, now seen corresponding path program 1 times [2022-07-12 19:09:42,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:42,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781388717] [2022-07-12 19:09:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:42,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:42,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:42,868 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) [2022-07-12 19:09:42,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-12 19:09:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:43,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 19:09:43,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-12 19:09:43,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:09:43,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:43,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781388717] [2022-07-12 19:09:43,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781388717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:43,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:43,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:09:43,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908186759] [2022-07-12 19:09:43,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:43,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:09:43,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:43,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:09:43,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:09:43,376 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) [2022-07-12 19:09:45,393 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 [] [2022-07-12 19:09:46,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:46,015 INFO L93 Difference]: Finished difference Result 1260 states and 1667 transitions. [2022-07-12 19:09:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:09:46,016 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 [2022-07-12 19:09:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:46,019 INFO L225 Difference]: With dead ends: 1260 [2022-07-12 19:09:46,019 INFO L226 Difference]: Without dead ends: 1248 [2022-07-12 19:09:46,020 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 [2022-07-12 19:09:46,020 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 93 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s 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, 2.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:46,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1323 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-07-12 19:09:46,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-07-12 19:09:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1215. [2022-07-12 19:09:46,036 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) [2022-07-12 19:09:46,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1651 transitions. [2022-07-12 19:09:46,038 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1651 transitions. Word has length 74 [2022-07-12 19:09:46,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:46,039 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 1651 transitions. [2022-07-12 19:09:46,039 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) [2022-07-12 19:09:46,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1651 transitions. [2022-07-12 19:09:46,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 19:09:46,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:46,040 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] [2022-07-12 19:09:46,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-12 19:09:46,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:46,250 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)] === [2022-07-12 19:09:46,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:46,250 INFO L85 PathProgramCache]: Analyzing trace with hash -475870393, now seen corresponding path program 1 times [2022-07-12 19:09:46,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:46,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824788914] [2022-07-12 19:09:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:46,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:46,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:46,252 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:46,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 19:09:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:47,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 19:09:47,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:47,329 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:09:47,330 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 [2022-07-12 19:09:47,372 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 [2022-07-12 19:09:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-12 19:09:47,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:47,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:47,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824788914] [2022-07-12 19:09:47,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824788914] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:47,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [735453285] [2022-07-12 19:09:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:47,463 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:09:47,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:09:47,468 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) [2022-07-12 19:09:47,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-07-12 19:09:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:48,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 19:09:48,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:49,022 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-12 19:09:49,022 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 [2022-07-12 19:09:49,098 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 [2022-07-12 19:09:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-12 19:09:49,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:49,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [735453285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:49,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:09:49,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-12 19:09:49,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060136216] [2022-07-12 19:09:49,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:49,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 19:09:49,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:49,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 19:09:49,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-12 19:09:49,184 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) [2022-07-12 19:09:51,201 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 [] [2022-07-12 19:09:53,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:09:55,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:09:57,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:57,783 INFO L93 Difference]: Finished difference Result 1748 states and 2289 transitions. [2022-07-12 19:09:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:09:57,784 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 [2022-07-12 19:09:57,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:57,788 INFO L225 Difference]: With dead ends: 1748 [2022-07-12 19:09:57,789 INFO L226 Difference]: Without dead ends: 1748 [2022-07-12 19:09:57,789 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 [2022-07-12 19:09:57,789 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 1348 mSDsluCounter, 2902 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 156 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s 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, 8.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:57,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1349 Valid, 3609 Invalid, 2429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2270 Invalid, 3 Unknown, 0 Unchecked, 8.5s Time] [2022-07-12 19:09:57,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2022-07-12 19:09:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1525. [2022-07-12 19:09:57,805 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) [2022-07-12 19:09:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2187 transitions. [2022-07-12 19:09:57,808 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2187 transitions. Word has length 76 [2022-07-12 19:09:57,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:57,808 INFO L495 AbstractCegarLoop]: Abstraction has 1525 states and 2187 transitions. [2022-07-12 19:09:57,808 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) [2022-07-12 19:09:57,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2187 transitions. [2022-07-12 19:09:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 19:09:57,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:57,809 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] [2022-07-12 19:09:57,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-07-12 19:09:58,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:58,231 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 [2022-07-12 19:09:58,231 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)] === [2022-07-12 19:09:58,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash -475870392, now seen corresponding path program 1 times [2022-07-12 19:09:58,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:58,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348347120] [2022-07-12 19:09:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:58,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:58,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:58,233 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:58,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-12 19:09:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:59,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 19:09:59,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:59,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:09:59,570 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 [2022-07-12 19:09:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-12 19:09:59,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:01,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:01,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348347120] [2022-07-12 19:10:01,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348347120] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:01,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [639317201] [2022-07-12 19:10:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:01,964 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:01,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:10:01,968 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:10:01,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-07-12 19:10:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:03,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 19:10:03,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:03,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:03,909 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 [2022-07-12 19:10:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-12 19:10:03,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:06,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [639317201] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:06,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:06,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-12 19:10:06,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700003734] [2022-07-12 19:10:06,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:06,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:10:06,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:06,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:10:06,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:10:06,237 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) [2022-07-12 19:10:08,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:10:10,264 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:10:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:13,266 INFO L93 Difference]: Finished difference Result 1948 states and 2512 transitions. [2022-07-12 19:10:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:10:13,266 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 [2022-07-12 19:10:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:13,271 INFO L225 Difference]: With dead ends: 1948 [2022-07-12 19:10:13,271 INFO L226 Difference]: Without dead ends: 1948 [2022-07-12 19:10:13,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-12 19:10:13,272 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 994 mSDsluCounter, 1688 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s 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, 6.9s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:13,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 2311 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1905 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2022-07-12 19:10:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2022-07-12 19:10:13,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1702. [2022-07-12 19:10:13,289 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) [2022-07-12 19:10:13,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2484 transitions. [2022-07-12 19:10:13,306 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2484 transitions. Word has length 76 [2022-07-12 19:10:13,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:13,306 INFO L495 AbstractCegarLoop]: Abstraction has 1702 states and 2484 transitions. [2022-07-12 19:10:13,307 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) [2022-07-12 19:10:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2484 transitions. [2022-07-12 19:10:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 19:10:13,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:13,308 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] [2022-07-12 19:10:13,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:13,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:13,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:13,718 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)] === [2022-07-12 19:10:13,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:13,718 INFO L85 PathProgramCache]: Analyzing trace with hash 862802860, now seen corresponding path program 1 times [2022-07-12 19:10:13,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:13,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396298465] [2022-07-12 19:10:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:13,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:13,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:13,720 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:13,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-12 19:10:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:14,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 19:10:14,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:14,916 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:10:14,917 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 [2022-07-12 19:10:14,958 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 [2022-07-12 19:10:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-07-12 19:10:14,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:15,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:15,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396298465] [2022-07-12 19:10:15,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396298465] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:15,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [199119776] [2022-07-12 19:10:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:15,061 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:15,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:10:15,062 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) [2022-07-12 19:10:15,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-12 19:10:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:16,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 19:10:16,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:16,669 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-12 19:10:16,669 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 [2022-07-12 19:10:16,741 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 [2022-07-12 19:10:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-07-12 19:10:16,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:16,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [199119776] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:16,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:16,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-12 19:10:16,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142093284] [2022-07-12 19:10:16,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:16,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 19:10:16,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:16,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 19:10:16,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-12 19:10:16,857 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) [2022-07-12 19:10:18,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:10:20,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:10:22,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:10:24,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:10:27,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:27,628 INFO L93 Difference]: Finished difference Result 1877 states and 2496 transitions. [2022-07-12 19:10:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:10:27,629 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 [2022-07-12 19:10:27,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:27,634 INFO L225 Difference]: With dead ends: 1877 [2022-07-12 19:10:27,634 INFO L226 Difference]: Without dead ends: 1877 [2022-07-12 19:10:27,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 167 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-12 19:10:27,635 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 749 mSDsluCounter, 3364 mSDsCounter, 0 mSdLazyCounter, 2424 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s 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, 10.7s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:27,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 4071 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2424 Invalid, 4 Unknown, 0 Unchecked, 10.7s Time] [2022-07-12 19:10:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-07-12 19:10:27,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1700. [2022-07-12 19:10:27,656 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) [2022-07-12 19:10:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2482 transitions. [2022-07-12 19:10:27,659 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2482 transitions. Word has length 82 [2022-07-12 19:10:27,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:27,659 INFO L495 AbstractCegarLoop]: Abstraction has 1700 states and 2482 transitions. [2022-07-12 19:10:27,659 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) [2022-07-12 19:10:27,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2482 transitions. [2022-07-12 19:10:27,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 19:10:27,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:27,661 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] [2022-07-12 19:10:27,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:27,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:28,079 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 [2022-07-12 19:10:28,080 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)] === [2022-07-12 19:10:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash 862802861, now seen corresponding path program 1 times [2022-07-12 19:10:28,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:28,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975459081] [2022-07-12 19:10:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:28,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:28,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:28,082 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) [2022-07-12 19:10:28,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-12 19:10:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:29,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 19:10:29,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:29,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:29,516 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 [2022-07-12 19:10:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-12 19:10:29,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:32,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:32,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975459081] [2022-07-12 19:10:32,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975459081] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:32,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [665424990] [2022-07-12 19:10:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:32,375 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:32,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:10:32,376 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) [2022-07-12 19:10:32,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-07-12 19:10:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:33,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 19:10:33,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:34,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:34,310 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 [2022-07-12 19:10:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-12 19:10:34,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:36,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [665424990] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:36,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:36,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-12 19:10:36,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427442881] [2022-07-12 19:10:36,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:36,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:10:36,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:36,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:10:36,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:10:36,578 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) [2022-07-12 19:10:38,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:10:40,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:10:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:43,565 INFO L93 Difference]: Finished difference Result 1944 states and 2508 transitions. [2022-07-12 19:10:43,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:10:43,566 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 [2022-07-12 19:10:43,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:43,570 INFO L225 Difference]: With dead ends: 1944 [2022-07-12 19:10:43,571 INFO L226 Difference]: Without dead ends: 1944 [2022-07-12 19:10:43,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-12 19:10:43,571 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 983 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s 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, 6.9s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:43,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 2313 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1897 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2022-07-12 19:10:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-07-12 19:10:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1698. [2022-07-12 19:10:43,590 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) [2022-07-12 19:10:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2480 transitions. [2022-07-12 19:10:43,592 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2480 transitions. Word has length 82 [2022-07-12 19:10:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:43,592 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 2480 transitions. [2022-07-12 19:10:43,592 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) [2022-07-12 19:10:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2480 transitions. [2022-07-12 19:10:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-12 19:10:43,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:43,593 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] [2022-07-12 19:10:43,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:43,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:43,995 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 [2022-07-12 19:10:43,996 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)] === [2022-07-12 19:10:43,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1028659715, now seen corresponding path program 1 times [2022-07-12 19:10:43,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:43,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724099125] [2022-07-12 19:10:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:43,997 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:43,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:43,998 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) [2022-07-12 19:10:43,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-12 19:10:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:44,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 19:10:44,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-12 19:10:44,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:44,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724099125] [2022-07-12 19:10:44,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724099125] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:44,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:44,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 19:10:44,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809161532] [2022-07-12 19:10:44,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:44,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:10:44,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:44,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:10:44,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:10:44,519 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) [2022-07-12 19:10:44,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:44,549 INFO L93 Difference]: Finished difference Result 1336 states and 1886 transitions. [2022-07-12 19:10:44,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:10:44,549 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 [2022-07-12 19:10:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:44,563 INFO L225 Difference]: With dead ends: 1336 [2022-07-12 19:10:44,563 INFO L226 Difference]: Without dead ends: 1331 [2022-07-12 19:10:44,563 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 [2022-07-12 19:10:44,566 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 [2022-07-12 19:10:44,567 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] [2022-07-12 19:10:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-07-12 19:10:44,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1331. [2022-07-12 19:10:44,583 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) [2022-07-12 19:10:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1880 transitions. [2022-07-12 19:10:44,585 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1880 transitions. Word has length 81 [2022-07-12 19:10:44,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:44,585 INFO L495 AbstractCegarLoop]: Abstraction has 1331 states and 1880 transitions. [2022-07-12 19:10:44,585 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) [2022-07-12 19:10:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1880 transitions. [2022-07-12 19:10:44,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-12 19:10:44,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:44,586 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] [2022-07-12 19:10:44,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:44,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:44,798 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)] === [2022-07-12 19:10:44,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:44,798 INFO L85 PathProgramCache]: Analyzing trace with hash 838655585, now seen corresponding path program 1 times [2022-07-12 19:10:44,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:44,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903265955] [2022-07-12 19:10:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:44,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:44,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:44,800 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) [2022-07-12 19:10:44,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-12 19:10:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:46,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 19:10:46,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:46,233 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:10:46,234 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 [2022-07-12 19:10:46,265 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 [2022-07-12 19:10:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-12 19:10:46,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:46,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:46,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903265955] [2022-07-12 19:10:46,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903265955] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:46,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:46,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:10:46,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157993806] [2022-07-12 19:10:46,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:46,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:10:46,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:46,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:10:46,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:10:46,313 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) [2022-07-12 19:10:48,330 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 [] [2022-07-12 19:10:49,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:49,595 INFO L93 Difference]: Finished difference Result 1506 states and 1892 transitions. [2022-07-12 19:10:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:10:49,596 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 [2022-07-12 19:10:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:49,599 INFO L225 Difference]: With dead ends: 1506 [2022-07-12 19:10:49,599 INFO L226 Difference]: Without dead ends: 1506 [2022-07-12 19:10:49,600 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 [2022-07-12 19:10:49,600 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 722 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:49,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1580 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 733 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-07-12 19:10:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-07-12 19:10:49,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1329. [2022-07-12 19:10:49,621 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) [2022-07-12 19:10:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1878 transitions. [2022-07-12 19:10:49,623 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1878 transitions. Word has length 88 [2022-07-12 19:10:49,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:49,623 INFO L495 AbstractCegarLoop]: Abstraction has 1329 states and 1878 transitions. [2022-07-12 19:10:49,623 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) [2022-07-12 19:10:49,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1878 transitions. [2022-07-12 19:10:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-12 19:10:49,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:49,624 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] [2022-07-12 19:10:49,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-12 19:10:49,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:49,841 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)] === [2022-07-12 19:10:49,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:49,842 INFO L85 PathProgramCache]: Analyzing trace with hash 838655586, now seen corresponding path program 1 times [2022-07-12 19:10:49,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:49,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548588699] [2022-07-12 19:10:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:49,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:49,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:49,843 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) [2022-07-12 19:10:49,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-12 19:10:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:51,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 19:10:51,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:51,463 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 19:10:51,463 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 [2022-07-12 19:10:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-12 19:10:51,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:51,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:51,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548588699] [2022-07-12 19:10:51,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548588699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:51,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:51,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:10:51,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920238252] [2022-07-12 19:10:51,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:51,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:10:51,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:51,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:10:51,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:10:51,607 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) [2022-07-12 19:10:53,625 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 [] [2022-07-12 19:10:54,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:54,853 INFO L93 Difference]: Finished difference Result 1380 states and 1885 transitions. [2022-07-12 19:10:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:10:54,853 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 [2022-07-12 19:10:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:54,856 INFO L225 Difference]: With dead ends: 1380 [2022-07-12 19:10:54,856 INFO L226 Difference]: Without dead ends: 1380 [2022-07-12 19:10:54,857 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 [2022-07-12 19:10:54,857 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 123 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:54,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1857 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 516 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-07-12 19:10:54,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-07-12 19:10:54,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1327. [2022-07-12 19:10:54,868 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) [2022-07-12 19:10:54,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1875 transitions. [2022-07-12 19:10:54,870 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1875 transitions. Word has length 88 [2022-07-12 19:10:54,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:54,870 INFO L495 AbstractCegarLoop]: Abstraction has 1327 states and 1875 transitions. [2022-07-12 19:10:54,870 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) [2022-07-12 19:10:54,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1875 transitions. [2022-07-12 19:10:54,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-12 19:10:54,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:54,871 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] [2022-07-12 19:10:54,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:55,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:55,087 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)] === [2022-07-12 19:10:55,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:55,088 INFO L85 PathProgramCache]: Analyzing trace with hash 228519724, now seen corresponding path program 1 times [2022-07-12 19:10:55,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:55,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777841200] [2022-07-12 19:10:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:55,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:55,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:55,089 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) [2022-07-12 19:10:55,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-12 19:10:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:56,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 19:10:56,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:56,580 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:10:56,580 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 [2022-07-12 19:10:56,614 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 [2022-07-12 19:10:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-12 19:10:56,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:56,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:56,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777841200] [2022-07-12 19:10:56,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777841200] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:56,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:56,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:10:56,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852999240] [2022-07-12 19:10:56,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:56,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:10:56,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:10:56,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:10:56,666 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) [2022-07-12 19:10:58,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:11:00,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:11:02,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:02,286 INFO L93 Difference]: Finished difference Result 1502 states and 1887 transitions. [2022-07-12 19:11:02,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:11:02,288 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 [2022-07-12 19:11:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:02,291 INFO L225 Difference]: With dead ends: 1502 [2022-07-12 19:11:02,291 INFO L226 Difference]: Without dead ends: 1502 [2022-07-12 19:11:02,291 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 [2022-07-12 19:11:02,291 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 1081 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 59 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s 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, 5.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:02,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 2137 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1102 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-07-12 19:11:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2022-07-12 19:11:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1325. [2022-07-12 19:11:02,316 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) [2022-07-12 19:11:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1873 transitions. [2022-07-12 19:11:02,318 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1873 transitions. Word has length 89 [2022-07-12 19:11:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:02,318 INFO L495 AbstractCegarLoop]: Abstraction has 1325 states and 1873 transitions. [2022-07-12 19:11:02,318 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) [2022-07-12 19:11:02,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1873 transitions. [2022-07-12 19:11:02,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-12 19:11:02,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:02,319 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] [2022-07-12 19:11:02,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:02,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:11:02,527 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)] === [2022-07-12 19:11:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash 228519725, now seen corresponding path program 1 times [2022-07-12 19:11:02,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:02,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190227620] [2022-07-12 19:11:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:02,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:02,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:02,529 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) [2022-07-12 19:11:02,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-12 19:11:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:03,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 19:11:03,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:04,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:04,226 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 [2022-07-12 19:11:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-12 19:11:04,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:08,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:08,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190227620] [2022-07-12 19:11:08,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190227620] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:08,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2108478391] [2022-07-12 19:11:08,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:08,609 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:11:08,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:11:08,610 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) [2022-07-12 19:11:08,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-07-12 19:11:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:10,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 19:11:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:10,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:10,908 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 [2022-07-12 19:11:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-12 19:11:11,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:11,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2108478391] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:11,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:11:11,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-12 19:11:11,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101486446] [2022-07-12 19:11:11,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:11:11,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:11:11,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:11,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:11:11,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2022-07-12 19:11:11,218 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) [2022-07-12 19:11:13,235 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 [] [2022-07-12 19:11:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:15,758 INFO L93 Difference]: Finished difference Result 1569 states and 1899 transitions. [2022-07-12 19:11:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:11:15,759 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 [2022-07-12 19:11:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:15,762 INFO L225 Difference]: With dead ends: 1569 [2022-07-12 19:11:15,762 INFO L226 Difference]: Without dead ends: 1569 [2022-07-12 19:11:15,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=33, Invalid=56, Unknown=1, NotChecked=0, Total=90 [2022-07-12 19:11:15,762 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 1388 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 93 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s 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, 4.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:15,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1388 Valid, 1877 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1251 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-07-12 19:11:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2022-07-12 19:11:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1323. [2022-07-12 19:11:15,773 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) [2022-07-12 19:11:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1871 transitions. [2022-07-12 19:11:15,774 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1871 transitions. Word has length 89 [2022-07-12 19:11:15,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:15,775 INFO L495 AbstractCegarLoop]: Abstraction has 1323 states and 1871 transitions. [2022-07-12 19:11:15,775 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) [2022-07-12 19:11:15,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1871 transitions. [2022-07-12 19:11:15,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-12 19:11:15,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:15,775 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] [2022-07-12 19:11:15,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-07-12 19:11:16,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-07-12 19:11:16,189 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 [2022-07-12 19:11:16,189 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)] === [2022-07-12 19:11:16,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:16,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1317347739, now seen corresponding path program 1 times [2022-07-12 19:11:16,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:16,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038304042] [2022-07-12 19:11:16,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:16,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:16,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:16,192 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) [2022-07-12 19:11:16,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-12 19:11:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:16,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 19:11:16,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-12 19:11:16,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:11:16,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:16,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038304042] [2022-07-12 19:11:16,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038304042] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:11:16,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:11:16,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 19:11:16,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229967030] [2022-07-12 19:11:16,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:11:16,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:11:16,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:16,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:11:16,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:11:16,920 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) [2022-07-12 19:11:18,937 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 [] [2022-07-12 19:11:20,944 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 [] [2022-07-12 19:11:22,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:22,586 INFO L93 Difference]: Finished difference Result 1498 states and 1883 transitions. [2022-07-12 19:11:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:11:22,586 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 [2022-07-12 19:11:22,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:22,589 INFO L225 Difference]: With dead ends: 1498 [2022-07-12 19:11:22,589 INFO L226 Difference]: Without dead ends: 1498 [2022-07-12 19:11:22,589 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 [2022-07-12 19:11:22,589 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 793 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s 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, 5.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:22,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 2200 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1094 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-07-12 19:11:22,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-07-12 19:11:22,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1321. [2022-07-12 19:11:22,599 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) [2022-07-12 19:11:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1869 transitions. [2022-07-12 19:11:22,601 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1869 transitions. Word has length 96 [2022-07-12 19:11:22,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:22,601 INFO L495 AbstractCegarLoop]: Abstraction has 1321 states and 1869 transitions. [2022-07-12 19:11:22,601 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) [2022-07-12 19:11:22,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1869 transitions. [2022-07-12 19:11:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-12 19:11:22,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:22,602 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] [2022-07-12 19:11:22,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:22,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:11:22,816 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)] === [2022-07-12 19:11:22,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:22,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1317347738, now seen corresponding path program 1 times [2022-07-12 19:11:22,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:22,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451044133] [2022-07-12 19:11:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:22,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:22,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:22,818 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) [2022-07-12 19:11:22,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-12 19:11:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:24,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 19:11:24,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:24,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:24,840 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 [2022-07-12 19:11:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-12 19:11:25,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:27,721 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:27,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451044133] [2022-07-12 19:11:27,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451044133] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:27,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [339702973] [2022-07-12 19:11:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:27,722 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:11:27,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:11:27,723 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) [2022-07-12 19:11:27,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-07-12 19:11:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:29,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 19:11:29,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:30,090 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:11:30,091 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 [2022-07-12 19:11:30,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 19:11:30,526 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:11:30,526 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 [2022-07-12 19:11:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-12 19:11:30,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:31,030 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 [2022-07-12 19:11:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-12 19:11:31,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [339702973] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:31,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:11:31,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 17 [2022-07-12 19:11:31,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639043370] [2022-07-12 19:11:31,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:11:31,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 19:11:31,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:31,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 19:11:31,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-07-12 19:11:31,951 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) [2022-07-12 19:11:33,968 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 [] [2022-07-12 19:11:35,976 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:11:37,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:11:39,995 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 [] [2022-07-12 19:11:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:11:48,091 INFO L93 Difference]: Finished difference Result 1373 states and 1878 transitions. [2022-07-12 19:11:48,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 19:11:48,092 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 [2022-07-12 19:11:48,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:11:48,094 INFO L225 Difference]: With dead ends: 1373 [2022-07-12 19:11:48,094 INFO L226 Difference]: Without dead ends: 1373 [2022-07-12 19:11:48,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-07-12 19:11:48,095 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 222 mSDsluCounter, 3614 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 11 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s 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, 16.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:11:48,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 4361 Invalid, 1943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1928 Invalid, 4 Unknown, 0 Unchecked, 16.0s Time] [2022-07-12 19:11:48,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2022-07-12 19:11:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1320. [2022-07-12 19:11:48,104 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) [2022-07-12 19:11:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1868 transitions. [2022-07-12 19:11:48,106 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1868 transitions. Word has length 96 [2022-07-12 19:11:48,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:11:48,106 INFO L495 AbstractCegarLoop]: Abstraction has 1320 states and 1868 transitions. [2022-07-12 19:11:48,107 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) [2022-07-12 19:11:48,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1868 transitions. [2022-07-12 19:11:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-12 19:11:48,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:11:48,107 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] [2022-07-12 19:11:48,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:48,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-07-12 19:11:48,515 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 [2022-07-12 19:11:48,516 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)] === [2022-07-12 19:11:48,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:11:48,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2111894061, now seen corresponding path program 1 times [2022-07-12 19:11:48,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:11:48,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101559565] [2022-07-12 19:11:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:48,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:11:48,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:11:48,518 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) [2022-07-12 19:11:48,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-12 19:11:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:49,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 19:11:49,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:50,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:11:50,526 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 [2022-07-12 19:11:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-12 19:11:50,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:53,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:11:53,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101559565] [2022-07-12 19:11:53,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101559565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:53,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [771599835] [2022-07-12 19:11:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:11:53,445 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:11:53,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:11:53,446 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) [2022-07-12 19:11:53,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-07-12 19:11:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:11:55,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 19:11:55,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:11:55,922 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:11:55,922 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 [2022-07-12 19:11:56,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 19:11:56,370 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:11:56,371 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 [2022-07-12 19:11:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-12 19:11:56,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:11:56,905 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 [2022-07-12 19:11:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-12 19:11:57,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [771599835] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 19:11:57,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:11:57,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 17 [2022-07-12 19:11:57,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538032889] [2022-07-12 19:11:57,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:11:57,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 19:11:57,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:11:57,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 19:11:57,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-07-12 19:11:57,796 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) [2022-07-12 19:11:59,812 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 [] [2022-07-12 19:12:01,819 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:12:03,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 19:12:05,835 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 [] [2022-07-12 19:12:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:12:13,546 INFO L93 Difference]: Finished difference Result 1372 states and 1877 transitions. [2022-07-12 19:12:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 19:12:13,547 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 97 [2022-07-12 19:12:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:12:13,549 INFO L225 Difference]: With dead ends: 1372 [2022-07-12 19:12:13,549 INFO L226 Difference]: Without dead ends: 1372 [2022-07-12 19:12:13,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-07-12 19:12:13,550 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 243 mSDsluCounter, 3065 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 21 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 3812 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:12:13,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 3812 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1678 Invalid, 4 Unknown, 0 Unchecked, 15.6s Time] [2022-07-12 19:12:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2022-07-12 19:12:13,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1319. [2022-07-12 19:12:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 861 states have (on average 1.7224157955865274) internal successors, (1483), 1055 states have internal predecessors, (1483), 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) [2022-07-12 19:12:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1867 transitions. [2022-07-12 19:12:13,562 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1867 transitions. Word has length 97 [2022-07-12 19:12:13,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:12:13,562 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 1867 transitions. [2022-07-12 19:12:13,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-07-12 19:12:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1867 transitions. [2022-07-12 19:12:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-12 19:12:13,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:12:13,563 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:12:13,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-07-12 19:12:13,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-12 19:12:13,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:12:13,979 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting cdev_addErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-12 19:12:13,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:12:13,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1542682259, now seen corresponding path program 1 times [2022-07-12 19:12:13,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:12:13,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013046867] [2022-07-12 19:12:13,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:12:13,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:12:13,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:12:13,981 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:12:13,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-12 19:12:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:12:15,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 19:12:15,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:12:15,789 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:12:15,789 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 [2022-07-12 19:12:15,837 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 [2022-07-12 19:12:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-12 19:12:15,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:12:15,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:12:15,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013046867] [2022-07-12 19:12:15,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013046867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:12:15,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:12:15,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:12:15,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403628607] [2022-07-12 19:12:15,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:12:15,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:12:15,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:12:15,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:12:15,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:12:15,931 INFO L87 Difference]: Start difference. First operand 1319 states and 1867 transitions. Second operand has 4 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)