./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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_outb.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 b9ba053a0d2bb5cff65ef20f502acdb8ce89a9e82653cf0711701cf2b8f86a02 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:41:53,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:41:53,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:41:53,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:41:53,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:41:53,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:41:53,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:41:53,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:41:53,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:41:53,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:41:53,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:41:53,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:41:53,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:41:53,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:41:53,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:41:53,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:41:53,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:41:53,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:41:53,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:41:53,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:41:53,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:41:53,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:41:53,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:41:53,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:41:53,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:41:53,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:41:53,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:41:53,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:41:53,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:41:53,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:41:53,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:41:53,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:41:53,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:41:53,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:41:53,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:41:53,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:41:53,982 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:41:53,982 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:41:53,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:41:53,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:41:53,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:41:53,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 16:41:54,018 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:41:54,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:41:54,019 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:41:54,019 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:41:54,020 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:41:54,020 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:41:54,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:41:54,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:41:54,021 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:41:54,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:41:54,022 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:41:54,022 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:41:54,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:41:54,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:41:54,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:41:54,023 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:41:54,023 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:41:54,023 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:41:54,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:41:54,024 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:41:54,024 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:41:54,024 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:41:54,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:41:54,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:41:54,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:41:54,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:41:54,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:41:54,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:41:54,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:41:54,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:41:54,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:41:54,026 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9ba053a0d2bb5cff65ef20f502acdb8ce89a9e82653cf0711701cf2b8f86a02 [2021-12-22 16:41:54,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:41:54,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:41:54,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:41:54,315 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:41:54,315 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:41:54,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i [2021-12-22 16:41:54,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a408b5d7/840c0bcdf9fe452088ffda1049a23461/FLAG567e5672f [2021-12-22 16:41:55,003 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:41:55,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i [2021-12-22 16:41:55,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a408b5d7/840c0bcdf9fe452088ffda1049a23461/FLAG567e5672f [2021-12-22 16:41:55,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a408b5d7/840c0bcdf9fe452088ffda1049a23461 [2021-12-22 16:41:55,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:41:55,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:41:55,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:41:55,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:41:55,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:41:55,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:41:55" (1/1) ... [2021-12-22 16:41:55,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b15e43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:41:55, skipping insertion in model container [2021-12-22 16:41:55,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:41:55" (1/1) ... [2021-12-22 16:41:55,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:41:55,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:41:55,687 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_outb.i[453,466] [2021-12-22 16:41:56,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:41:56,433 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) [2021-12-22 16:41:56,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@ccc287b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:41:56, skipping insertion in model container [2021-12-22 16:41:56,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:41:56,434 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-22 16:41:56,435 INFO L158 Benchmark]: Toolchain (without parser) took 1043.72ms. Allocated memory was 86.0MB in the beginning and 113.2MB in the end (delta: 27.3MB). Free memory was 51.6MB in the beginning and 60.5MB in the end (delta: -8.9MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2021-12-22 16:41:56,436 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 86.0MB. Free memory was 43.6MB in the beginning and 43.6MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 16:41:56,437 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1041.25ms. Allocated memory was 86.0MB in the beginning and 113.2MB in the end (delta: 27.3MB). Free memory was 51.6MB in the beginning and 60.5MB in the end (delta: -8.9MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2021-12-22 16:41:56,438 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 86.0MB. Free memory was 43.6MB in the beginning and 43.6MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1041.25ms. Allocated memory was 86.0MB in the beginning and 113.2MB in the end (delta: 27.3MB). Free memory was 51.6MB in the beginning and 60.5MB in the end (delta: -8.9MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2975]: 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_outb.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 b9ba053a0d2bb5cff65ef20f502acdb8ce89a9e82653cf0711701cf2b8f86a02 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:41:58,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:41:58,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:41:58,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:41:58,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:41:58,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:41:58,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:41:58,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:41:58,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:41:58,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:41:58,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:41:58,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:41:58,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:41:58,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:41:58,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:41:58,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:41:58,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:41:58,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:41:58,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:41:58,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:41:58,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:41:58,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:41:58,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:41:58,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:41:58,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:41:58,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:41:58,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:41:58,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:41:58,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:41:58,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:41:58,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:41:58,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:41:58,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:41:58,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:41:58,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:41:58,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:41:58,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:41:58,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:41:58,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:41:58,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:41:58,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:41:58,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-22 16:41:58,301 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:41:58,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:41:58,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:41:58,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:41:58,303 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:41:58,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:41:58,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:41:58,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:41:58,305 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:41:58,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:41:58,306 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:41:58,307 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:41:58,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:41:58,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:41:58,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:41:58,308 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:41:58,308 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:41:58,308 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:41:58,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:41:58,309 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:41:58,309 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 16:41:58,309 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 16:41:58,309 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:41:58,309 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:41:58,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:41:58,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:41:58,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:41:58,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:41:58,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:41:58,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:41:58,311 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 16:41:58,311 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 16:41:58,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:41:58,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 16:41:58,312 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9ba053a0d2bb5cff65ef20f502acdb8ce89a9e82653cf0711701cf2b8f86a02 [2021-12-22 16:41:58,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:41:58,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:41:58,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:41:58,719 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:41:58,720 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:41:58,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i [2021-12-22 16:41:58,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44f45ac77/a8bca3e1d8264f1e8aca562407c6fc61/FLAG50f3b400d [2021-12-22 16:41:59,478 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:41:59,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i [2021-12-22 16:41:59,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44f45ac77/a8bca3e1d8264f1e8aca562407c6fc61/FLAG50f3b400d [2021-12-22 16:41:59,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44f45ac77/a8bca3e1d8264f1e8aca562407c6fc61 [2021-12-22 16:41:59,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:41:59,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:41:59,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:41:59,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:41:59,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:41:59,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:41:59" (1/1) ... [2021-12-22 16:41:59,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e0ca3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:41:59, skipping insertion in model container [2021-12-22 16:41:59,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:41:59" (1/1) ... [2021-12-22 16:41:59,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:41:59,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:42:00,075 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_outb.i[453,466] [2021-12-22 16:42:00,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:42:00,928 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-22 16:42:00,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:42:00,963 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_outb.i[453,466] [2021-12-22 16:42:01,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:42:01,201 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:42:01,210 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_outb.i[453,466] [2021-12-22 16:42:01,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:42:01,481 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:42:01,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:42:01 WrapperNode [2021-12-22 16:42:01,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:42:01,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:42:01,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:42:01,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:42:01,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:42:01" (1/1) ... [2021-12-22 16:42:01,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:42:01" (1/1) ... [2021-12-22 16:42:01,657 INFO L137 Inliner]: procedures = 482, calls = 839, calls flagged for inlining = 54, calls inlined = 38, statements flattened = 981 [2021-12-22 16:42:01,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:42:01,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:42:01,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:42:01,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:42:01,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:42:01" (1/1) ... [2021-12-22 16:42:01,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:42:01" (1/1) ... [2021-12-22 16:42:01,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:42:01" (1/1) ... [2021-12-22 16:42:01,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:42:01" (1/1) ... [2021-12-22 16:42:01,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:42:01" (1/1) ... [2021-12-22 16:42:01,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:42:01" (1/1) ... [2021-12-22 16:42:01,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:42:01" (1/1) ... [2021-12-22 16:42:01,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:42:01,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:42:01,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:42:01,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:42:01,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:42:01" (1/1) ... [2021-12-22 16:42:01,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:42:01,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:42:01,812 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) [2021-12-22 16:42:01,821 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 [2021-12-22 16:42:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure zf_timer_off [2021-12-22 16:42:01,854 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_timer_off [2021-12-22 16:42:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-12-22 16:42:01,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-12-22 16:42:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 16:42:01,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_begin [2021-12-22 16:42:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-22 16:42:01,856 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-22 16:42:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:42:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-12-22 16:42:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 16:42:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-22 16:42:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-22 16:42:01,857 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-22 16:42:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 16:42:01,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_end [2021-12-22 16:42:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure zf_get_control [2021-12-22 16:42:01,858 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_get_control [2021-12-22 16:42:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-12-22 16:42:01,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-12-22 16:42:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 16:42:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure request_region [2021-12-22 16:42:01,858 INFO L138 BoogieDeclarations]: Found implementation of procedure request_region [2021-12-22 16:42:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 16:42:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 16:42:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-22 16:42:01,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-22 16:42:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irqsave [2021-12-22 16:42:01,859 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irqsave [2021-12-22 16:42:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure release_region [2021-12-22 16:42:01,860 INFO L138 BoogieDeclarations]: Found implementation of procedure release_region [2021-12-22 16:42:01,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:42:01,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:42:01,860 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_init [2021-12-22 16:42:01,861 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_init [2021-12-22 16:42:01,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-12-22 16:42:01,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 16:42:01,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-12-22 16:42:01,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 16:42:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 16:42:01,862 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 16:42:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-12-22 16:42:01,862 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-12-22 16:42:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 16:42:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 16:42:01,862 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-12-22 16:42:01,862 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-12-22 16:42:01,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-12-22 16:42:01,863 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_add [2021-12-22 16:42:01,863 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_add [2021-12-22 16:42:01,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-22 16:42:01,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-12-22 16:42:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-22 16:42:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 16:42:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2021-12-22 16:42:01,885 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2021-12-22 16:42:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-12-22 16:42:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-12-22 16:42:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-12-22 16:42:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-12-22 16:42:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2021-12-22 16:42:01,887 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2021-12-22 16:42:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure assert_context_process [2021-12-22 16:42:01,887 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_context_process [2021-12-22 16:42:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure zf_set_control [2021-12-22 16:42:01,887 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_set_control [2021-12-22 16:42:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2021-12-22 16:42:01,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2021-12-22 16:42:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure zf_readw [2021-12-22 16:42:01,888 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_readw [2021-12-22 16:42:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-12-22 16:42:01,889 INFO L130 BoogieDeclarations]: Found specification of procedure zf_ping [2021-12-22 16:42:01,889 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_ping [2021-12-22 16:42:01,889 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-22 16:42:01,889 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-22 16:42:01,889 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2021-12-22 16:42:01,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2021-12-22 16:42:02,260 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:42:02,262 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:42:07,039 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:42:07,049 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:42:07,050 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-22 16:42:07,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:42:07 BoogieIcfgContainer [2021-12-22 16:42:07,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:42:07,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:42:07,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:42:07,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:42:07,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:41:59" (1/3) ... [2021-12-22 16:42:07,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1700d7cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:42:07, skipping insertion in model container [2021-12-22 16:42:07,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:42:01" (2/3) ... [2021-12-22 16:42:07,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1700d7cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:42:07, skipping insertion in model container [2021-12-22 16:42:07,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:42:07" (3/3) ... [2021-12-22 16:42:07,060 INFO L111 eAbstractionObserver]: Analyzing ICFG ddv_machzwd_outb.i [2021-12-22 16:42:07,064 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:42:07,065 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 206 error locations. [2021-12-22 16:42:07,114 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:42:07,119 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 [2021-12-22 16:42:07,120 INFO L340 AbstractCegarLoop]: Starting to check reachability of 206 error locations. [2021-12-22 16:42:07,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 671 states, 360 states have (on average 1.8166666666666667) internal successors, (654), 571 states have internal predecessors, (654), 78 states have call successors, (78), 26 states have call predecessors, (78), 26 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2021-12-22 16:42:07,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-22 16:42:07,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:42:07,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-22 16:42:07,148 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)] === [2021-12-22 16:42:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:42:07,153 INFO L85 PathProgramCache]: Analyzing trace with hash 346313650, now seen corresponding path program 1 times [2021-12-22 16:42:07,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:42:07,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400184727] [2021-12-22 16:42:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:42:07,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:42:07,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:42:07,171 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) [2021-12-22 16:42:07,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 16:42:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:42:07,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:42:07,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:42:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:42:07,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:42:07,680 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:42:07,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400184727] [2021-12-22 16:42:07,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400184727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:42:07,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:42:07,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:42:07,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137294464] [2021-12-22 16:42:07,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:42:07,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:42:07,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:42:07,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:42:07,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:42:07,734 INFO L87 Difference]: Start difference. First operand has 671 states, 360 states have (on average 1.8166666666666667) internal successors, (654), 571 states have internal predecessors, (654), 78 states have call successors, (78), 26 states have call predecessors, (78), 26 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:42:09,794 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 16:42:11,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 16:42:14,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:42:14,359 INFO L93 Difference]: Finished difference Result 1214 states and 1453 transitions. [2021-12-22 16:42:14,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:42:14,368 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 [2021-12-22 16:42:14,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:42:14,383 INFO L225 Difference]: With dead ends: 1214 [2021-12-22 16:42:14,383 INFO L226 Difference]: Without dead ends: 1210 [2021-12-22 16:42:14,384 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 [2021-12-22 16:42:14,387 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 692 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:42:14,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 2446 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1110 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-12-22 16:42:14,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-12-22 16:42:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 995. [2021-12-22 16:42:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 601 states have (on average 1.7970049916805324) internal successors, (1080), 822 states have internal predecessors, (1080), 138 states have call successors, (138), 50 states have call predecessors, (138), 50 states have return successors, (138), 131 states have call predecessors, (138), 138 states have call successors, (138) [2021-12-22 16:42:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1356 transitions. [2021-12-22 16:42:14,516 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1356 transitions. Word has length 5 [2021-12-22 16:42:14,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:42:14,517 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 1356 transitions. [2021-12-22 16:42:14,518 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) [2021-12-22 16:42:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1356 transitions. [2021-12-22 16:42:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-22 16:42:14,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:42:14,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-22 16:42:14,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-22 16:42:14,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:42:14,736 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)] === [2021-12-22 16:42:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:42:14,736 INFO L85 PathProgramCache]: Analyzing trace with hash 346313651, now seen corresponding path program 1 times [2021-12-22 16:42:14,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:42:14,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420795178] [2021-12-22 16:42:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:42:14,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:42:14,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:42:14,739 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) [2021-12-22 16:42:14,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 16:42:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:42:15,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:42:15,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:42:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:42:15,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:42:15,193 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:42:15,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420795178] [2021-12-22 16:42:15,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420795178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:42:15,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:42:15,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:42:15,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687509323] [2021-12-22 16:42:15,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:42:15,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:42:15,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:42:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:42:15,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:42:15,207 INFO L87 Difference]: Start difference. First operand 995 states and 1356 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) [2021-12-22 16:42:17,234 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 16:42:19,247 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 16:42:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:42:21,488 INFO L93 Difference]: Finished difference Result 1132 states and 1453 transitions. [2021-12-22 16:42:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:42:21,489 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 [2021-12-22 16:42:21,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:42:21,496 INFO L225 Difference]: With dead ends: 1132 [2021-12-22 16:42:21,497 INFO L226 Difference]: Without dead ends: 1132 [2021-12-22 16:42:21,497 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 [2021-12-22 16:42:21,498 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 273 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 2625 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:42:21,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 2625 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 842 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-12-22 16:42:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-12-22 16:42:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1071. [2021-12-22 16:42:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 645 states have (on average 1.758139534883721) internal successors, (1134), 867 states have internal predecessors, (1134), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2021-12-22 16:42:21,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1448 transitions. [2021-12-22 16:42:21,536 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1448 transitions. Word has length 5 [2021-12-22 16:42:21,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:42:21,536 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 1448 transitions. [2021-12-22 16:42:21,536 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) [2021-12-22 16:42:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1448 transitions. [2021-12-22 16:42:21,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 16:42:21,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:42:21,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:42:21,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-22 16:42:21,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:42:21,751 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)] === [2021-12-22 16:42:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:42:21,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1264119090, now seen corresponding path program 1 times [2021-12-22 16:42:21,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:42:21,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654252542] [2021-12-22 16:42:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:42:21,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:42:21,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:42:21,754 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) [2021-12-22 16:42:21,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 16:42:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:42:22,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:42:22,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:42:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:42:22,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:42:22,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:42:22,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654252542] [2021-12-22 16:42:22,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654252542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:42:22,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:42:22,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-22 16:42:22,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367189694] [2021-12-22 16:42:22,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:42:22,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:42:22,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:42:22,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:42:22,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:42:22,214 INFO L87 Difference]: Start difference. First operand 1071 states and 1448 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) [2021-12-22 16:42:23,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:42:23,622 INFO L93 Difference]: Finished difference Result 1279 states and 1536 transitions. [2021-12-22 16:42:23,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:42:23,623 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 [2021-12-22 16:42:23,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:42:23,631 INFO L225 Difference]: With dead ends: 1279 [2021-12-22 16:42:23,631 INFO L226 Difference]: Without dead ends: 1279 [2021-12-22 16:42:23,631 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 [2021-12-22 16:42:23,632 INFO L933 BasicCegarLoop]: 728 mSDtfsCounter, 665 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:42:23,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 1281 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 16:42:23,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-12-22 16:42:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1070. [2021-12-22 16:42:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 645 states have (on average 1.7503875968992249) internal successors, (1129), 866 states have internal predecessors, (1129), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2021-12-22 16:42:23,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1443 transitions. [2021-12-22 16:42:23,673 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1443 transitions. Word has length 11 [2021-12-22 16:42:23,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:42:23,674 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1443 transitions. [2021-12-22 16:42:23,674 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) [2021-12-22 16:42:23,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1443 transitions. [2021-12-22 16:42:23,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 16:42:23,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:42:23,675 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:42:23,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:42:23,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:42:23,889 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)] === [2021-12-22 16:42:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:42:23,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1264119091, now seen corresponding path program 1 times [2021-12-22 16:42:23,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:42:23,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978520123] [2021-12-22 16:42:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:42:23,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:42:23,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:42:23,892 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) [2021-12-22 16:42:23,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 16:42:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:42:24,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:42:24,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:42:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:42:24,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:42:24,456 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:42:24,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978520123] [2021-12-22 16:42:24,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978520123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:42:24,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:42:24,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:42:24,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889047046] [2021-12-22 16:42:24,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:42:24,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:42:24,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:42:24,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:42:24,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:42:24,457 INFO L87 Difference]: Start difference. First operand 1070 states and 1443 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) [2021-12-22 16:42:26,484 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 [] [2021-12-22 16:42:28,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:42:28,178 INFO L93 Difference]: Finished difference Result 1138 states and 1459 transitions. [2021-12-22 16:42:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:42:28,178 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 [2021-12-22 16:42:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:42:28,183 INFO L225 Difference]: With dead ends: 1138 [2021-12-22 16:42:28,183 INFO L226 Difference]: Without dead ends: 1138 [2021-12-22 16:42:28,183 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 [2021-12-22 16:42:28,184 INFO L933 BasicCegarLoop]: 831 mSDtfsCounter, 273 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-22 16:42:28,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1518 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 410 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-12-22 16:42:28,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-12-22 16:42:28,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1073. [2021-12-22 16:42:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 648 states have (on average 1.7469135802469136) internal successors, (1132), 869 states have internal predecessors, (1132), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2021-12-22 16:42:28,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1446 transitions. [2021-12-22 16:42:28,210 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1446 transitions. Word has length 11 [2021-12-22 16:42:28,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:42:28,211 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 1446 transitions. [2021-12-22 16:42:28,211 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) [2021-12-22 16:42:28,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1446 transitions. [2021-12-22 16:42:28,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 16:42:28,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:42:28,212 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:42:28,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:42:28,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:42:28,426 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)] === [2021-12-22 16:42:28,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:42:28,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1098875471, now seen corresponding path program 1 times [2021-12-22 16:42:28,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:42:28,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942613344] [2021-12-22 16:42:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:42:28,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:42:28,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:42:28,428 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) [2021-12-22 16:42:28,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 16:42:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:42:28,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:42:28,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:42:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:42:28,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:42:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:42:29,262 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:42:29,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942613344] [2021-12-22 16:42:29,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942613344] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:42:29,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:42:29,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2021-12-22 16:42:29,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586621935] [2021-12-22 16:42:29,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:42:29,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:42:29,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:42:29,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:42:29,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:42:29,270 INFO L87 Difference]: Start difference. First operand 1073 states and 1446 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) [2021-12-22 16:42:31,302 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 [] [2021-12-22 16:42:33,311 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 [] [2021-12-22 16:42:39,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:42:39,639 INFO L93 Difference]: Finished difference Result 1353 states and 1698 transitions. [2021-12-22 16:42:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:42:39,639 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 [2021-12-22 16:42:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:42:39,644 INFO L225 Difference]: With dead ends: 1353 [2021-12-22 16:42:39,644 INFO L226 Difference]: Without dead ends: 1353 [2021-12-22 16:42:39,645 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 [2021-12-22 16:42:39,646 INFO L933 BasicCegarLoop]: 831 mSDtfsCounter, 1346 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 168 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1358 SdHoareTripleChecker+Valid, 2724 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:42:39,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1358 Valid, 2724 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1175 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2021-12-22 16:42:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-12-22 16:42:39,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1223. [2021-12-22 16:42:39,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 755 states have (on average 1.732450331125828) internal successors, (1308), 978 states have internal predecessors, (1308), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2021-12-22 16:42:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1676 transitions. [2021-12-22 16:42:39,674 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1676 transitions. Word has length 14 [2021-12-22 16:42:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:42:39,675 INFO L470 AbstractCegarLoop]: Abstraction has 1223 states and 1676 transitions. [2021-12-22 16:42:39,675 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) [2021-12-22 16:42:39,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1676 transitions. [2021-12-22 16:42:39,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 16:42:39,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:42:39,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:42:39,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:42:39,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:42:39,890 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)] === [2021-12-22 16:42:39,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:42:39,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1126023645, now seen corresponding path program 1 times [2021-12-22 16:42:39,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:42:39,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025511325] [2021-12-22 16:42:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:42:39,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:42:39,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:42:39,893 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) [2021-12-22 16:42:39,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 16:42:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:42:40,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 16:42:40,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:42:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:42:40,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:42:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:42:40,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:42:40,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025511325] [2021-12-22 16:42:40,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025511325] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:42:40,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:42:40,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-22 16:42:40,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199696749] [2021-12-22 16:42:40,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:42:40,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:42:40,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:42:40,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:42:40,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:42:40,387 INFO L87 Difference]: Start difference. First operand 1223 states and 1676 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) [2021-12-22 16:42:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:42:40,688 INFO L93 Difference]: Finished difference Result 1229 states and 1680 transitions. [2021-12-22 16:42:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:42:40,689 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 [2021-12-22 16:42:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:42:40,693 INFO L225 Difference]: With dead ends: 1229 [2021-12-22 16:42:40,693 INFO L226 Difference]: Without dead ends: 1229 [2021-12-22 16:42:40,694 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 [2021-12-22 16:42:40,694 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 1284 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 2964 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:42:40,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 2964 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:42:40,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-12-22 16:42:40,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1228. [2021-12-22 16:42:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 760 states have (on average 1.7263157894736842) internal successors, (1312), 983 states have internal predecessors, (1312), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2021-12-22 16:42:40,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1680 transitions. [2021-12-22 16:42:40,722 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1680 transitions. Word has length 19 [2021-12-22 16:42:40,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:42:40,723 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 1680 transitions. [2021-12-22 16:42:40,723 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) [2021-12-22 16:42:40,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1680 transitions. [2021-12-22 16:42:40,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 16:42:40,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:42:40,724 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:42:40,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-22 16:42:40,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:42:40,939 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)] === [2021-12-22 16:42:40,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:42:40,939 INFO L85 PathProgramCache]: Analyzing trace with hash 741098035, now seen corresponding path program 2 times [2021-12-22 16:42:40,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:42:40,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552962842] [2021-12-22 16:42:40,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:42:40,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:42:40,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:42:40,942 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) [2021-12-22 16:42:40,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 16:42:41,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:42:41,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:42:41,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 16:42:41,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:42:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:42:41,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:42:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:42:42,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:42:42,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552962842] [2021-12-22 16:42:42,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552962842] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:42:42,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:42:42,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-12-22 16:42:42,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568143032] [2021-12-22 16:42:42,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:42:42,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 16:42:42,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:42:42,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 16:42:42,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:42:42,879 INFO L87 Difference]: Start difference. First operand 1228 states and 1680 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) [2021-12-22 16:42:44,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 16:42:46,913 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 16:42:48,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []