./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_all.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 a564ea576763c13bfd3673da7d9fb82b1799f9ec9208539e745949eb812373cd --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 06:01:54,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 06:01:54,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 06:01:54,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 06:01:54,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 06:01:54,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 06:01:54,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 06:01:54,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 06:01:54,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 06:01:54,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 06:01:54,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 06:01:54,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 06:01:54,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 06:01:54,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 06:01:54,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 06:01:54,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 06:01:54,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 06:01:54,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 06:01:54,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 06:01:54,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 06:01:54,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 06:01:54,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 06:01:54,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 06:01:54,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 06:01:54,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 06:01:54,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 06:01:54,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 06:01:54,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 06:01:54,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 06:01:54,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 06:01:54,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 06:01:54,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 06:01:54,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 06:01:54,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 06:01:54,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 06:01:54,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 06:01:54,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 06:01:54,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 06:01:54,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 06:01:54,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 06:01:54,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 06:01:54,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 06:01:54,730 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 06:01:54,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 06:01:54,731 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 06:01:54,731 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 06:01:54,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 06:01:54,732 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 06:01:54,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 06:01:54,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 06:01:54,733 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 06:01:54,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 06:01:54,734 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 06:01:54,734 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 06:01:54,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 06:01:54,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 06:01:54,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 06:01:54,735 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 06:01:54,735 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 06:01:54,735 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 06:01:54,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 06:01:54,736 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 06:01:54,736 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 06:01:54,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 06:01:54,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 06:01:54,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 06:01:54,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 06:01:54,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:01:54,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 06:01:54,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 06:01:54,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 06:01:54,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 06:01:54,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 06:01:54,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a564ea576763c13bfd3673da7d9fb82b1799f9ec9208539e745949eb812373cd [2021-12-16 06:01:54,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 06:01:54,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 06:01:54,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 06:01:54,962 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 06:01:54,963 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 06:01:54,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_all.i [2021-12-16 06:01:55,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0072ece6e/dbdabfddf27e4f61ba93cfd0d3f708bf/FLAG025aec350 [2021-12-16 06:01:55,623 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 06:01:55,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_all.i [2021-12-16 06:01:55,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0072ece6e/dbdabfddf27e4f61ba93cfd0d3f708bf/FLAG025aec350 [2021-12-16 06:01:55,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0072ece6e/dbdabfddf27e4f61ba93cfd0d3f708bf [2021-12-16 06:01:55,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 06:01:55,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 06:01:55,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 06:01:55,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 06:01:55,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 06:01:55,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:01:55" (1/1) ... [2021-12-16 06:01:55,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7320fa2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:55, skipping insertion in model container [2021-12-16 06:01:55,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:01:55" (1/1) ... [2021-12-16 06:01:55,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 06:01:55,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:01:56,108 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_all.i[452,465] [2021-12-16 06:01:56,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:01:56,966 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-16 06:01:56,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7df8a704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:56, skipping insertion in model container [2021-12-16 06:01:56,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 06:01:56,967 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-16 06:01:56,969 INFO L158 Benchmark]: Toolchain (without parser) took 1119.83ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 63.0MB in the beginning and 61.6MB in the end (delta: 1.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-12-16 06:01:56,971 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 96.5MB. Free memory is still 53.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:01:56,972 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1117.82ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 62.7MB in the beginning and 61.6MB in the end (delta: 1.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-12-16 06:01:56,973 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 96.5MB. Free memory is still 53.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1117.82ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 62.7MB in the beginning and 61.6MB in the end (delta: 1.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2992]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_all.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 a564ea576763c13bfd3673da7d9fb82b1799f9ec9208539e745949eb812373cd --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 06:01:58,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 06:01:58,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 06:01:58,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 06:01:58,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 06:01:58,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 06:01:58,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 06:01:58,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 06:01:58,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 06:01:58,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 06:01:58,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 06:01:58,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 06:01:58,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 06:01:58,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 06:01:58,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 06:01:58,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 06:01:58,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 06:01:58,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 06:01:58,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 06:01:58,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 06:01:58,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 06:01:58,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 06:01:58,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 06:01:58,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 06:01:58,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 06:01:58,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 06:01:58,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 06:01:58,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 06:01:58,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 06:01:58,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 06:01:58,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 06:01:58,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 06:01:58,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 06:01:58,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 06:01:58,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 06:01:58,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 06:01:58,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 06:01:58,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 06:01:58,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 06:01:58,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 06:01:58,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 06:01:58,832 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-16 06:01:58,868 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 06:01:58,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 06:01:58,869 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 06:01:58,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 06:01:58,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 06:01:58,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 06:01:58,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 06:01:58,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 06:01:58,872 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 06:01:58,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 06:01:58,873 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 06:01:58,873 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 06:01:58,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 06:01:58,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 06:01:58,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 06:01:58,874 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 06:01:58,874 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 06:01:58,874 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 06:01:58,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 06:01:58,875 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 06:01:58,875 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 06:01:58,875 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 06:01:58,875 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 06:01:58,875 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 06:01:58,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 06:01:58,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 06:01:58,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 06:01:58,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:01:58,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 06:01:58,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 06:01:58,877 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 06:01:58,877 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 06:01:58,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 06:01:58,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 06:01:58,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a564ea576763c13bfd3673da7d9fb82b1799f9ec9208539e745949eb812373cd [2021-12-16 06:01:59,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 06:01:59,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 06:01:59,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 06:01:59,236 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 06:01:59,237 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 06:01:59,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_all.i [2021-12-16 06:01:59,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5ebfb0b7/ca8ca875068d44bd9ca2adab0eea191f/FLAG92f305f71 [2021-12-16 06:01:59,969 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 06:01:59,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_all.i [2021-12-16 06:01:59,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5ebfb0b7/ca8ca875068d44bd9ca2adab0eea191f/FLAG92f305f71 [2021-12-16 06:02:00,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5ebfb0b7/ca8ca875068d44bd9ca2adab0eea191f [2021-12-16 06:02:00,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 06:02:00,304 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 06:02:00,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 06:02:00,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 06:02:00,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 06:02:00,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:02:00" (1/1) ... [2021-12-16 06:02:00,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3571af87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:02:00, skipping insertion in model container [2021-12-16 06:02:00,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:02:00" (1/1) ... [2021-12-16 06:02:00,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 06:02:00,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:02:00,585 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_all.i[452,465] [2021-12-16 06:02:01,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:02:01,684 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-16 06:02:01,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:02:01,723 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_all.i[452,465] [2021-12-16 06:02:01,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:02:01,895 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 06:02:01,914 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_all.i[452,465] [2021-12-16 06:02:02,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:02:02,280 INFO L208 MainTranslator]: Completed translation [2021-12-16 06:02:02,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:02:02 WrapperNode [2021-12-16 06:02:02,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 06:02:02,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 06:02:02,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 06:02:02,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 06:02:02,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:02:02" (1/1) ... [2021-12-16 06:02:02,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:02:02" (1/1) ... [2021-12-16 06:02:02,399 INFO L137 Inliner]: procedures = 484, calls = 866, calls flagged for inlining = 55, calls inlined = 37, statements flattened = 984 [2021-12-16 06:02:02,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 06:02:02,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 06:02:02,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 06:02:02,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 06:02:02,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:02:02" (1/1) ... [2021-12-16 06:02:02,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:02:02" (1/1) ... [2021-12-16 06:02:02,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:02:02" (1/1) ... [2021-12-16 06:02:02,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:02:02" (1/1) ... [2021-12-16 06:02:02,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:02:02" (1/1) ... [2021-12-16 06:02:02,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:02:02" (1/1) ... [2021-12-16 06:02:02,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:02:02" (1/1) ... [2021-12-16 06:02:02,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 06:02:02,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 06:02:02,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 06:02:02,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 06:02:02,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:02:02" (1/1) ... [2021-12-16 06:02:02,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:02:02,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:02:02,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 06:02:02,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 06:02:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure zf_timer_off [2021-12-16 06:02:02,609 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_timer_off [2021-12-16 06:02:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-12-16 06:02:02,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-12-16 06:02:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-16 06:02:02,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_begin [2021-12-16 06:02:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-16 06:02:02,613 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-16 06:02:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 06:02:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-12-16 06:02:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 06:02:02,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-16 06:02:02,614 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-16 06:02:02,614 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-16 06:02:02,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-16 06:02:02,614 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_end [2021-12-16 06:02:02,614 INFO L130 BoogieDeclarations]: Found specification of procedure zf_get_control [2021-12-16 06:02:02,614 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_get_control [2021-12-16 06:02:02,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 06:02:02,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 06:02:02,615 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-12-16 06:02:02,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-12-16 06:02:02,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 06:02:02,615 INFO L130 BoogieDeclarations]: Found specification of procedure request_region [2021-12-16 06:02:02,616 INFO L138 BoogieDeclarations]: Found implementation of procedure request_region [2021-12-16 06:02:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 06:02:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 06:02:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-16 06:02:02,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-16 06:02:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irqsave [2021-12-16 06:02:02,617 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irqsave [2021-12-16 06:02:02,617 INFO L130 BoogieDeclarations]: Found specification of procedure release_region [2021-12-16 06:02:02,617 INFO L138 BoogieDeclarations]: Found implementation of procedure release_region [2021-12-16 06:02:02,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 06:02:02,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 06:02:02,617 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_init [2021-12-16 06:02:02,618 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_init [2021-12-16 06:02:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-12-16 06:02:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 06:02:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-12-16 06:02:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-16 06:02:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 06:02:02,619 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 06:02:02,619 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-12-16 06:02:02,619 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-12-16 06:02:02,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 06:02:02,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 06:02:02,620 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-12-16 06:02:02,620 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-12-16 06:02:02,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-12-16 06:02:02,621 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_add [2021-12-16 06:02:02,621 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_add [2021-12-16 06:02:02,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-16 06:02:02,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-12-16 06:02:02,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 06:02:02,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 06:02:02,623 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2021-12-16 06:02:02,623 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2021-12-16 06:02:02,624 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-12-16 06:02:02,624 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-12-16 06:02:02,624 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-12-16 06:02:02,624 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-12-16 06:02:02,624 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2021-12-16 06:02:02,625 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2021-12-16 06:02:02,625 INFO L130 BoogieDeclarations]: Found specification of procedure assert_context_process [2021-12-16 06:02:02,625 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_context_process [2021-12-16 06:02:02,625 INFO L130 BoogieDeclarations]: Found specification of procedure zf_set_control [2021-12-16 06:02:02,626 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_set_control [2021-12-16 06:02:02,626 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2021-12-16 06:02:02,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2021-12-16 06:02:02,626 INFO L130 BoogieDeclarations]: Found specification of procedure zf_readw [2021-12-16 06:02:02,626 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_readw [2021-12-16 06:02:02,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-12-16 06:02:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure zf_ping [2021-12-16 06:02:02,627 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_ping [2021-12-16 06:02:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-16 06:02:02,627 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-16 06:02:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2021-12-16 06:02:02,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2021-12-16 06:02:02,899 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 06:02:02,901 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 06:02:07,478 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 06:02:07,487 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 06:02:07,487 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 06:02:07,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:02:07 BoogieIcfgContainer [2021-12-16 06:02:07,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 06:02:07,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 06:02:07,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 06:02:07,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 06:02:07,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 06:02:00" (1/3) ... [2021-12-16 06:02:07,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795756a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:02:07, skipping insertion in model container [2021-12-16 06:02:07,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:02:02" (2/3) ... [2021-12-16 06:02:07,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795756a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:02:07, skipping insertion in model container [2021-12-16 06:02:07,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:02:07" (3/3) ... [2021-12-16 06:02:07,502 INFO L111 eAbstractionObserver]: Analyzing ICFG ddv_machzwd_all.i [2021-12-16 06:02:07,506 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 06:02:07,506 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 206 error locations. [2021-12-16 06:02:07,548 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 06:02:07,555 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 06:02:07,555 INFO L340 AbstractCegarLoop]: Starting to check reachability of 206 error locations. [2021-12-16 06:02:07,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 676 states, 361 states have (on average 1.814404432132964) internal successors, (655), 572 states have internal predecessors, (655), 81 states have call successors, (81), 27 states have call predecessors, (81), 27 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2021-12-16 06:02:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-16 06:02:07,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:02:07,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-16 06:02:07,597 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting spin_lock_initErr0REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-16 06:02:07,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:02:07,601 INFO L85 PathProgramCache]: Analyzing trace with hash 388275715, now seen corresponding path program 1 times [2021-12-16 06:02:07,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:02:07,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991824834] [2021-12-16 06:02:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:02:07,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:02:07,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:02:07,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:02:07,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 06:02:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:02:08,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:02:08,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:02:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:02:08,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:02:08,153 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:02:08,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991824834] [2021-12-16 06:02:08,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991824834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:02:08,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:02:08,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:02:08,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743542668] [2021-12-16 06:02:08,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:02:08,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 06:02:08,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:02:08,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 06:02:08,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:02:08,185 INFO L87 Difference]: Start difference. First operand has 676 states, 361 states have (on average 1.814404432132964) internal successors, (655), 572 states have internal predecessors, (655), 81 states have call successors, (81), 27 states have call predecessors, (81), 27 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) 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) [2021-12-16 06:02:10,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 06:02:12,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 06:02:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:02:14,755 INFO L93 Difference]: Finished difference Result 1224 states and 1467 transitions. [2021-12-16 06:02:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:02:14,757 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 [2021-12-16 06:02:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:02:14,783 INFO L225 Difference]: With dead ends: 1224 [2021-12-16 06:02:14,783 INFO L226 Difference]: Without dead ends: 1220 [2021-12-16 06:02:14,784 INFO L932 BasicCegarLoop]: 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 [2021-12-16 06:02:14,787 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 699 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-16 06:02:14,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 2474 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1122 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-12-16 06:02:14,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-12-16 06:02:14,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1005. [2021-12-16 06:02:14,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 603 states have (on average 1.7943615257048093) internal successors, (1082), 824 states have internal predecessors, (1082), 144 states have call successors, (144), 52 states have call predecessors, (144), 52 states have return successors, (144), 137 states have call predecessors, (144), 144 states have call successors, (144) [2021-12-16 06:02:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1370 transitions. [2021-12-16 06:02:14,920 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1370 transitions. Word has length 5 [2021-12-16 06:02:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:02:14,921 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 1370 transitions. [2021-12-16 06:02:14,923 INFO L471 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) [2021-12-16 06:02:14,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1370 transitions. [2021-12-16 06:02:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-16 06:02:14,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:02:14,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-16 06:02:14,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-16 06:02:15,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:02:15,139 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting spin_lock_initErr1REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-16 06:02:15,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:02:15,140 INFO L85 PathProgramCache]: Analyzing trace with hash 388275716, now seen corresponding path program 1 times [2021-12-16 06:02:15,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:02:15,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194865104] [2021-12-16 06:02:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:02:15,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:02:15,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:02:15,143 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:02:15,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 06:02:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:02:15,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 06:02:15,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:02:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:02:15,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:02:15,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:02:15,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194865104] [2021-12-16 06:02:15,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194865104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:02:15,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:02:15,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:02:15,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416392920] [2021-12-16 06:02:15,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:02:15,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 06:02:15,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:02:15,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 06:02:15,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:02:15,617 INFO L87 Difference]: Start difference. First operand 1005 states and 1370 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) [2021-12-16 06:02:17,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 06:02:19,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 06:02:21,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:02:21,896 INFO L93 Difference]: Finished difference Result 1147 states and 1474 transitions. [2021-12-16 06:02:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:02:21,897 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 [2021-12-16 06:02:21,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:02:21,903 INFO L225 Difference]: With dead ends: 1147 [2021-12-16 06:02:21,903 INFO L226 Difference]: Without dead ends: 1147 [2021-12-16 06:02:21,904 INFO L932 BasicCegarLoop]: 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 [2021-12-16 06:02:21,904 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 280 mSDsluCounter, 1794 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 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, 6.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:02:21,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 2630 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 850 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-12-16 06:02:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-12-16 06:02:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1086. [2021-12-16 06:02:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 648 states have (on average 1.7546296296296295) internal successors, (1137), 870 states have internal predecessors, (1137), 166 states have call successors, (166), 66 states have call predecessors, (166), 66 states have return successors, (166), 159 states have call predecessors, (166), 166 states have call successors, (166) [2021-12-16 06:02:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1469 transitions. [2021-12-16 06:02:21,937 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1469 transitions. Word has length 5 [2021-12-16 06:02:21,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:02:21,937 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 1469 transitions. [2021-12-16 06:02:21,937 INFO L471 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) [2021-12-16 06:02:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1469 transitions. [2021-12-16 06:02:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 06:02:21,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:02:21,938 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:02:21,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-16 06:02:22,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:02:22,144 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-16 06:02:22,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:02:22,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1210393666, now seen corresponding path program 1 times [2021-12-16 06:02:22,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:02:22,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303139132] [2021-12-16 06:02:22,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:02:22,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:02:22,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:02:22,146 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:02:22,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 06:02:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:02:22,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 06:02:22,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:02:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:02:22,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:02:22,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:02:22,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303139132] [2021-12-16 06:02:22,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303139132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:02:22,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:02:22,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-16 06:02:22,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930462768] [2021-12-16 06:02:22,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:02:22,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:02:22,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:02:22,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:02:22,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:02:22,555 INFO L87 Difference]: Start difference. First operand 1086 states and 1469 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) [2021-12-16 06:02:23,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:02:23,751 INFO L93 Difference]: Finished difference Result 1294 states and 1557 transitions. [2021-12-16 06:02:23,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:02:23,751 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 [2021-12-16 06:02:23,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:02:23,757 INFO L225 Difference]: With dead ends: 1294 [2021-12-16 06:02:23,757 INFO L226 Difference]: Without dead ends: 1294 [2021-12-16 06:02:23,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:02:23,758 INFO L933 BasicCegarLoop]: 742 mSDtfsCounter, 672 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:02:23,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 1302 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-16 06:02:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-12-16 06:02:23,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1085. [2021-12-16 06:02:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 648 states have (on average 1.7469135802469136) internal successors, (1132), 869 states have internal predecessors, (1132), 166 states have call successors, (166), 66 states have call predecessors, (166), 66 states have return successors, (166), 159 states have call predecessors, (166), 166 states have call successors, (166) [2021-12-16 06:02:23,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1464 transitions. [2021-12-16 06:02:23,789 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1464 transitions. Word has length 11 [2021-12-16 06:02:23,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:02:23,790 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 1464 transitions. [2021-12-16 06:02:23,790 INFO L471 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) [2021-12-16 06:02:23,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1464 transitions. [2021-12-16 06:02:23,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 06:02:23,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:02:23,791 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:02:23,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-16 06:02:24,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:02:24,004 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-16 06:02:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:02:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1210393665, now seen corresponding path program 1 times [2021-12-16 06:02:24,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:02:24,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312382807] [2021-12-16 06:02:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:02:24,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:02:24,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:02:24,007 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:02:24,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 06:02:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:02:24,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:02:24,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:02:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:02:24,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:02:24,492 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:02:24,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312382807] [2021-12-16 06:02:24,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312382807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:02:24,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:02:24,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:02:24,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901662927] [2021-12-16 06:02:24,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:02:24,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:02:24,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:02:24,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:02:24,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:02:24,494 INFO L87 Difference]: Start difference. First operand 1085 states and 1464 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) [2021-12-16 06:02:26,519 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 [] [2021-12-16 06:02:28,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:02:28,292 INFO L93 Difference]: Finished difference Result 1153 states and 1480 transitions. [2021-12-16 06:02:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:02:28,293 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 [2021-12-16 06:02:28,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:02:28,298 INFO L225 Difference]: With dead ends: 1153 [2021-12-16 06:02:28,298 INFO L226 Difference]: Without dead ends: 1153 [2021-12-16 06:02:28,298 INFO L932 BasicCegarLoop]: 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 [2021-12-16 06:02:28,300 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 271 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 2001 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-16 06:02:28,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 2001 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 574 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-12-16 06:02:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-12-16 06:02:28,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1088. [2021-12-16 06:02:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 651 states have (on average 1.7434715821812596) internal successors, (1135), 872 states have internal predecessors, (1135), 166 states have call successors, (166), 66 states have call predecessors, (166), 66 states have return successors, (166), 159 states have call predecessors, (166), 166 states have call successors, (166) [2021-12-16 06:02:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1467 transitions. [2021-12-16 06:02:28,363 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1467 transitions. Word has length 11 [2021-12-16 06:02:28,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:02:28,364 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1467 transitions. [2021-12-16 06:02:28,364 INFO L471 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) [2021-12-16 06:02:28,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1467 transitions. [2021-12-16 06:02:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 06:02:28,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:02:28,365 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:02:28,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-16 06:02:28,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:02:28,580 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-16 06:02:28,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:02:28,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1708073711, now seen corresponding path program 1 times [2021-12-16 06:02:28,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:02:28,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921768368] [2021-12-16 06:02:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:02:28,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:02:28,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:02:28,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:02:28,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 06:02:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:02:28,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 06:02:28,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:02:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:02:29,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:02:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:02:29,455 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:02:29,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921768368] [2021-12-16 06:02:29,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921768368] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:02:29,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:02:29,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2021-12-16 06:02:29,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521870840] [2021-12-16 06:02:29,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:02:29,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 06:02:29,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:02:29,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 06:02:29,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:02:29,457 INFO L87 Difference]: Start difference. First operand 1088 states and 1467 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) [2021-12-16 06:02:31,475 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 [] [2021-12-16 06:02:33,483 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 [] [2021-12-16 06:02:38,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:02:38,968 INFO L93 Difference]: Finished difference Result 1373 states and 1726 transitions. [2021-12-16 06:02:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 06:02:38,969 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 [2021-12-16 06:02:38,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:02:38,974 INFO L225 Difference]: With dead ends: 1373 [2021-12-16 06:02:38,974 INFO L226 Difference]: Without dead ends: 1373 [2021-12-16 06:02:38,974 INFO L932 BasicCegarLoop]: 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 [2021-12-16 06:02:38,975 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 1117 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 159 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 2811 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:02:38,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1129 Valid, 2811 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1270 Invalid, 2 Unknown, 0 Unchecked, 9.2s Time] [2021-12-16 06:02:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-12-16 06:02:38,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1243. [2021-12-16 06:02:39,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 759 states have (on average 1.7285902503293809) internal successors, (1312), 982 states have internal predecessors, (1312), 196 states have call successors, (196), 83 states have call predecessors, (196), 83 states have return successors, (196), 188 states have call predecessors, (196), 196 states have call successors, (196) [2021-12-16 06:02:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1704 transitions. [2021-12-16 06:02:39,005 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1704 transitions. Word has length 14 [2021-12-16 06:02:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:02:39,005 INFO L470 AbstractCegarLoop]: Abstraction has 1243 states and 1704 transitions. [2021-12-16 06:02:39,005 INFO L471 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) [2021-12-16 06:02:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1704 transitions. [2021-12-16 06:02:39,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 06:02:39,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:02:39,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:02:39,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-16 06:02:39,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:02:39,220 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-16 06:02:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:02:39,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1826997655, now seen corresponding path program 1 times [2021-12-16 06:02:39,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:02:39,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712282342] [2021-12-16 06:02:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:02:39,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:02:39,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:02:39,223 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:02:39,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-16 06:02:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:02:39,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 06:02:39,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:02:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:02:39,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:02:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:02:39,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:02:39,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712282342] [2021-12-16 06:02:39,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712282342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:02:39,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:02:39,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-16 06:02:39,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100516011] [2021-12-16 06:02:39,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:02:39,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 06:02:39,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:02:39,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 06:02:39,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:02:39,675 INFO L87 Difference]: Start difference. First operand 1243 states and 1704 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) [2021-12-16 06:02:39,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:02:39,944 INFO L93 Difference]: Finished difference Result 1249 states and 1708 transitions. [2021-12-16 06:02:39,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 06:02:39,945 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 [2021-12-16 06:02:39,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:02:39,950 INFO L225 Difference]: With dead ends: 1249 [2021-12-16 06:02:39,950 INFO L226 Difference]: Without dead ends: 1249 [2021-12-16 06:02:39,950 INFO L932 BasicCegarLoop]: 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 [2021-12-16 06:02:39,951 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 876 mSDsluCounter, 1862 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 2659 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:02:39,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 2659 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:02:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-12-16 06:02:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1248. [2021-12-16 06:02:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 764 states have (on average 1.7225130890052356) internal successors, (1316), 987 states have internal predecessors, (1316), 196 states have call successors, (196), 83 states have call predecessors, (196), 83 states have return successors, (196), 188 states have call predecessors, (196), 196 states have call successors, (196) [2021-12-16 06:02:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1708 transitions. [2021-12-16 06:02:39,980 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1708 transitions. Word has length 19 [2021-12-16 06:02:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:02:39,983 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 1708 transitions. [2021-12-16 06:02:39,983 INFO L471 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) [2021-12-16 06:02:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1708 transitions. [2021-12-16 06:02:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 06:02:39,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:02:39,984 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:02:40,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-16 06:02:40,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:02:40,199 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-16 06:02:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:02:40,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1057603649, now seen corresponding path program 2 times [2021-12-16 06:02:40,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:02:40,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834636379] [2021-12-16 06:02:40,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 06:02:40,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:02:40,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:02:40,201 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:02:40,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-16 06:02:40,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 06:02:40,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 06:02:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 06:02:40,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:02:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:02:40,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:02:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:02:41,798 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:02:41,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834636379] [2021-12-16 06:02:41,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834636379] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:02:41,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:02:41,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-12-16 06:02:41,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035690698] [2021-12-16 06:02:41,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:02:41,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 06:02:41,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:02:41,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 06:02:41,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-16 06:02:41,800 INFO L87 Difference]: Start difference. First operand 1248 states and 1708 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) [2021-12-16 06:02:43,817 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 [] [2021-12-16 06:02:45,828 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 [] [2021-12-16 06:02:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:02:57,985 INFO L93 Difference]: Finished difference Result 1377 states and 1743 transitions. [2021-12-16 06:02:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 06:02:57,986 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 [2021-12-16 06:02:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:02:57,991 INFO L225 Difference]: With dead ends: 1377 [2021-12-16 06:02:57,991 INFO L226 Difference]: Without dead ends: 1377 [2021-12-16 06:02:57,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-12-16 06:02:57,992 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 1144 mSDsluCounter, 4336 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 209 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 5157 SdHoareTripleChecker+Invalid, 2732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-12-16 06:02:57,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1156 Valid, 5157 Invalid, 2732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2521 Invalid, 2 Unknown, 0 Unchecked, 14.8s Time] [2021-12-16 06:02:57,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-12-16 06:02:58,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1261. [2021-12-16 06:02:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 777 states have (on average 1.7142857142857142) internal successors, (1332), 1000 states have internal predecessors, (1332), 196 states have call successors, (196), 83 states have call predecessors, (196), 83 states have return successors, (196), 188 states have call predecessors, (196), 196 states have call successors, (196) [2021-12-16 06:02:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1724 transitions. [2021-12-16 06:02:58,021 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1724 transitions. Word has length 23 [2021-12-16 06:02:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:02:58,021 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 1724 transitions. [2021-12-16 06:02:58,022 INFO L471 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) [2021-12-16 06:02:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1724 transitions. [2021-12-16 06:02:58,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 06:02:58,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:02:58,023 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:02:58,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-16 06:02:58,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:02:58,240 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-12-16 06:02:58,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:02:58,240 INFO L85 PathProgramCache]: Analyzing trace with hash 210869865, now seen corresponding path program 2 times [2021-12-16 06:02:58,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:02:58,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758347578] [2021-12-16 06:02:58,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 06:02:58,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:02:58,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:02:58,244 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:02:58,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-16 06:02:58,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 06:02:58,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 06:02:58,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 06:02:58,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:02:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-16 06:02:58,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:02:58,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:02:58,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758347578] [2021-12-16 06:02:58,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758347578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:02:58,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:02:58,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-16 06:02:58,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243197707] [2021-12-16 06:02:58,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:02:58,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:02:58,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:02:58,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:02:58,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:02:58,800 INFO L87 Difference]: Start difference. First operand 1261 states and 1724 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)