./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl_p.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl_p.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8acf23346fce853ea7f29f138c9c8af6d9070a3261dcb0ee52337c4f25e22e59 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:25:59,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:25:59,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:25:59,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:25:59,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:25:59,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:25:59,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:25:59,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:25:59,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:25:59,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:25:59,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:25:59,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:25:59,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:25:59,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:25:59,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:25:59,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:25:59,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:25:59,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:25:59,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:25:59,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:25:59,908 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:25:59,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:25:59,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:25:59,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:25:59,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:25:59,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:25:59,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:25:59,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:25:59,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:25:59,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:25:59,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:25:59,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:25:59,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:25:59,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:25:59,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:25:59,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:25:59,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:25:59,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:25:59,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:25:59,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:25:59,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:25:59,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:25:59,935 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 06:25:59,959 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:25:59,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:25:59,960 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:25:59,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:25:59,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:25:59,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:25:59,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:25:59,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:25:59,962 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:25:59,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:25:59,963 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:25:59,964 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:25:59,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:25:59,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:25:59,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:25:59,964 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:25:59,965 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:25:59,965 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:25:59,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:25:59,965 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:25:59,965 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:25:59,966 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:25:59,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:25:59,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:25:59,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:25:59,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:25:59,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:25:59,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:25:59,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 06:25:59,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 06:25:59,967 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8acf23346fce853ea7f29f138c9c8af6d9070a3261dcb0ee52337c4f25e22e59 [2022-07-23 06:26:00,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:26:00,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:26:00,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:26:00,222 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:26:00,223 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:26:00,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl_p.i [2022-07-23 06:26:00,280 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89d440098/54b8f96c49bc46598ec8667a6497126d/FLAG9b65307ca [2022-07-23 06:26:00,801 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:26:00,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl_p.i [2022-07-23 06:26:00,832 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89d440098/54b8f96c49bc46598ec8667a6497126d/FLAG9b65307ca [2022-07-23 06:26:01,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89d440098/54b8f96c49bc46598ec8667a6497126d [2022-07-23 06:26:01,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:26:01,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:26:01,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:26:01,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:26:01,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:26:01,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:26:01" (1/1) ... [2022-07-23 06:26:01,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a143b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:01, skipping insertion in model container [2022-07-23 06:26:01,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:26:01" (1/1) ... [2022-07-23 06:26:01,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:26:01,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:26:01,511 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_outl_p.i[458,471] [2022-07-23 06:26:02,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:26:02,439 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-23 06:26:02,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@636f8c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:02, skipping insertion in model container [2022-07-23 06:26:02,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:26:02,440 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-23 06:26:02,442 INFO L158 Benchmark]: Toolchain (without parser) took 1193.28ms. Allocated memory was 98.6MB in the beginning and 121.6MB in the end (delta: 23.1MB). Free memory was 61.7MB in the beginning and 67.3MB in the end (delta: -5.6MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. [2022-07-23 06:26:02,443 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 98.6MB. Free memory was 55.5MB in the beginning and 55.4MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 06:26:02,444 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1184.85ms. Allocated memory was 98.6MB in the beginning and 121.6MB in the end (delta: 23.1MB). Free memory was 61.5MB in the beginning and 67.3MB in the end (delta: -5.8MB). Peak memory consumption was 17.2MB. Max. memory is 16.1GB. [2022-07-23 06:26:02,445 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 98.6MB. Free memory was 55.5MB in the beginning and 55.4MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1184.85ms. Allocated memory was 98.6MB in the beginning and 121.6MB in the end (delta: 23.1MB). Free memory was 61.5MB in the beginning and 67.3MB in the end (delta: -5.8MB). Peak memory consumption was 17.2MB. 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 of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl_p.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8acf23346fce853ea7f29f138c9c8af6d9070a3261dcb0ee52337c4f25e22e59 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:26:04,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:26:04,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:26:04,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:26:04,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:26:04,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:26:04,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:26:04,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:26:04,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:26:04,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:26:04,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:26:04,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:26:04,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:26:04,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:26:04,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:26:04,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:26:04,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:26:04,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:26:04,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:26:04,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:26:04,283 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:26:04,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:26:04,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:26:04,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:26:04,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:26:04,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:26:04,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:26:04,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:26:04,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:26:04,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:26:04,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:26:04,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:26:04,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:26:04,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:26:04,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:26:04,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:26:04,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:26:04,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:26:04,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:26:04,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:26:04,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:26:04,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:26:04,306 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 06:26:04,340 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:26:04,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:26:04,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:26:04,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:26:04,342 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:26:04,342 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:26:04,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:26:04,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:26:04,343 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:26:04,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:26:04,344 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:26:04,344 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:26:04,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:26:04,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:26:04,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:26:04,345 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:26:04,345 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:26:04,346 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:26:04,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:26:04,346 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:26:04,346 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 06:26:04,346 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 06:26:04,346 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:26:04,347 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:26:04,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:26:04,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:26:04,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:26:04,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:26:04,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:26:04,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:26:04,348 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 06:26:04,348 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 06:26:04,349 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 06:26:04,349 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8acf23346fce853ea7f29f138c9c8af6d9070a3261dcb0ee52337c4f25e22e59 [2022-07-23 06:26:04,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:26:04,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:26:04,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:26:04,667 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:26:04,668 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:26:04,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl_p.i [2022-07-23 06:26:04,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cc5f7e27/403b3dce58584bdeb8f8676c1834e823/FLAGc4ad56f00 [2022-07-23 06:26:05,418 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:26:05,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl_p.i [2022-07-23 06:26:05,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cc5f7e27/403b3dce58584bdeb8f8676c1834e823/FLAGc4ad56f00 [2022-07-23 06:26:05,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cc5f7e27/403b3dce58584bdeb8f8676c1834e823 [2022-07-23 06:26:05,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:26:05,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:26:05,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:26:05,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:26:05,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:26:05,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:26:05" (1/1) ... [2022-07-23 06:26:05,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1843cdcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:05, skipping insertion in model container [2022-07-23 06:26:05,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:26:05" (1/1) ... [2022-07-23 06:26:05,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:26:05,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:26:05,942 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_outl_p.i[458,471] [2022-07-23 06:26:06,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:26:06,746 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-23 06:26:06,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:26:06,772 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_outl_p.i[458,471] [2022-07-23 06:26:06,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:26:06,960 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 06:26:06,969 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_outl_p.i[458,471] [2022-07-23 06:26:07,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:26:07,275 INFO L208 MainTranslator]: Completed translation [2022-07-23 06:26:07,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:07 WrapperNode [2022-07-23 06:26:07,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:26:07,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 06:26:07,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 06:26:07,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 06:26:07,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:07" (1/1) ... [2022-07-23 06:26:07,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:07" (1/1) ... [2022-07-23 06:26:07,452 INFO L137 Inliner]: procedures = 482, calls = 839, calls flagged for inlining = 54, calls inlined = 37, statements flattened = 970 [2022-07-23 06:26:07,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 06:26:07,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 06:26:07,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 06:26:07,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 06:26:07,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:07" (1/1) ... [2022-07-23 06:26:07,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:07" (1/1) ... [2022-07-23 06:26:07,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:07" (1/1) ... [2022-07-23 06:26:07,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:07" (1/1) ... [2022-07-23 06:26:07,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:07" (1/1) ... [2022-07-23 06:26:07,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:07" (1/1) ... [2022-07-23 06:26:07,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:07" (1/1) ... [2022-07-23 06:26:07,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 06:26:07,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 06:26:07,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 06:26:07,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 06:26:07,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:07" (1/1) ... [2022-07-23 06:26:07,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:26:07,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:26:07,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-23 06:26:07,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-23 06:26:07,655 INFO L130 BoogieDeclarations]: Found specification of procedure zf_timer_off [2022-07-23 06:26:07,655 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_timer_off [2022-07-23 06:26:07,656 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2022-07-23 06:26:07,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2022-07-23 06:26:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-23 06:26:07,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_begin [2022-07-23 06:26:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-07-23 06:26:07,657 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-07-23 06:26:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 06:26:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-07-23 06:26:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-23 06:26:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-07-23 06:26:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-07-23 06:26:07,658 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-07-23 06:26:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-23 06:26:07,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_end [2022-07-23 06:26:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure zf_get_control [2022-07-23 06:26:07,659 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_get_control [2022-07-23 06:26:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2022-07-23 06:26:07,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2022-07-23 06:26:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 06:26:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure request_region [2022-07-23 06:26:07,659 INFO L138 BoogieDeclarations]: Found implementation of procedure request_region [2022-07-23 06:26:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 06:26:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 06:26:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-07-23 06:26:07,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-07-23 06:26:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irqsave [2022-07-23 06:26:07,660 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irqsave [2022-07-23 06:26:07,660 INFO L130 BoogieDeclarations]: Found specification of procedure release_region [2022-07-23 06:26:07,660 INFO L138 BoogieDeclarations]: Found implementation of procedure release_region [2022-07-23 06:26:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 06:26:07,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 06:26:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_init [2022-07-23 06:26:07,661 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_init [2022-07-23 06:26:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-07-23 06:26:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-23 06:26:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-07-23 06:26:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-23 06:26:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-23 06:26:07,662 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-23 06:26:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2022-07-23 06:26:07,663 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2022-07-23 06:26:07,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 06:26:07,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 06:26:07,663 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2022-07-23 06:26:07,663 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2022-07-23 06:26:07,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-07-23 06:26:07,664 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_add [2022-07-23 06:26:07,664 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_add [2022-07-23 06:26:07,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-07-23 06:26:07,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-07-23 06:26:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-23 06:26:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 06:26:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2022-07-23 06:26:07,667 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2022-07-23 06:26:07,667 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2022-07-23 06:26:07,667 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2022-07-23 06:26:07,667 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-07-23 06:26:07,667 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-07-23 06:26:07,668 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2022-07-23 06:26:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2022-07-23 06:26:07,668 INFO L130 BoogieDeclarations]: Found specification of procedure assert_context_process [2022-07-23 06:26:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_context_process [2022-07-23 06:26:07,668 INFO L130 BoogieDeclarations]: Found specification of procedure zf_set_control [2022-07-23 06:26:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_set_control [2022-07-23 06:26:07,668 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2022-07-23 06:26:07,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2022-07-23 06:26:07,669 INFO L130 BoogieDeclarations]: Found specification of procedure zf_readw [2022-07-23 06:26:07,669 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_readw [2022-07-23 06:26:07,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-07-23 06:26:07,670 INFO L130 BoogieDeclarations]: Found specification of procedure zf_ping [2022-07-23 06:26:07,670 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_ping [2022-07-23 06:26:07,670 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-07-23 06:26:07,670 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-07-23 06:26:07,670 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2022-07-23 06:26:07,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2022-07-23 06:26:08,044 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 06:26:08,046 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 06:26:12,617 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 06:26:12,632 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 06:26:12,632 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-23 06:26:12,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:26:12 BoogieIcfgContainer [2022-07-23 06:26:12,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 06:26:12,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 06:26:12,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 06:26:12,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 06:26:12,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 06:26:05" (1/3) ... [2022-07-23 06:26:12,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2264898d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:26:12, skipping insertion in model container [2022-07-23 06:26:12,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:26:07" (2/3) ... [2022-07-23 06:26:12,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2264898d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:26:12, skipping insertion in model container [2022-07-23 06:26:12,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:26:12" (3/3) ... [2022-07-23 06:26:12,656 INFO L111 eAbstractionObserver]: Analyzing ICFG ddv_machzwd_outl_p.i [2022-07-23 06:26:12,668 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 06:26:12,669 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 205 error locations. [2022-07-23 06:26:12,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 06:26:12,731 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@124dd17e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1fd9fbe4 [2022-07-23 06:26:12,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 205 error locations. [2022-07-23 06:26:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 666 states, 356 states have (on average 1.8202247191011236) internal successors, (648), 566 states have internal predecessors, (648), 78 states have call successors, (78), 26 states have call predecessors, (78), 26 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-07-23 06:26:12,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-23 06:26:12,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:26:12,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-23 06:26:12,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:26:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:26:12,753 INFO L85 PathProgramCache]: Analyzing trace with hash 333908101, now seen corresponding path program 1 times [2022-07-23 06:26:12,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:26:12,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649488887] [2022-07-23 06:26:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:26:12,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:26:12,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:26:12,771 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:26:12,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 06:26:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:26:13,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:26:13,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:26:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:13,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:26:13,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:26:13,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649488887] [2022-07-23 06:26:13,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649488887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:26:13,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:26:13,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:26:13,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869545953] [2022-07-23 06:26:13,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:26:13,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:26:13,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:26:13,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:26:13,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:26:13,295 INFO L87 Difference]: Start difference. First operand has 666 states, 356 states have (on average 1.8202247191011236) internal successors, (648), 566 states have internal predecessors, (648), 78 states have call successors, (78), 26 states have call predecessors, (78), 26 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 06:26:15,333 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:17,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:26:19,691 INFO L93 Difference]: Finished difference Result 1204 states and 1443 transitions. [2022-07-23 06:26:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:26:19,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-23 06:26:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:26:19,708 INFO L225 Difference]: With dead ends: 1204 [2022-07-23 06:26:19,708 INFO L226 Difference]: Without dead ends: 1200 [2022-07-23 06:26:19,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:26:19,712 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 687 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 2484 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:26:19,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 2484 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1106 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-07-23 06:26:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-07-23 06:26:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 987. [2022-07-23 06:26:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 594 states have (on average 1.803030303030303) internal successors, (1071), 814 states have internal predecessors, (1071), 138 states have call successors, (138), 50 states have call predecessors, (138), 50 states have return successors, (138), 131 states have call predecessors, (138), 138 states have call successors, (138) [2022-07-23 06:26:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1347 transitions. [2022-07-23 06:26:19,804 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1347 transitions. Word has length 5 [2022-07-23 06:26:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:26:19,804 INFO L495 AbstractCegarLoop]: Abstraction has 987 states and 1347 transitions. [2022-07-23 06:26:19,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 06:26:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1347 transitions. [2022-07-23 06:26:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-23 06:26:19,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:26:19,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-23 06:26:19,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-23 06:26:20,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:26:20,016 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:26:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:26:20,016 INFO L85 PathProgramCache]: Analyzing trace with hash 333908102, now seen corresponding path program 1 times [2022-07-23 06:26:20,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:26:20,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56169818] [2022-07-23 06:26:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:26:20,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:26:20,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:26:20,019 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:26:20,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 06:26:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:26:20,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:26:20,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:26:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:20,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:26:20,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:26:20,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56169818] [2022-07-23 06:26:20,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56169818] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:26:20,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:26:20,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:26:20,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986953059] [2022-07-23 06:26:20,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:26:20,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:26:20,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:26:20,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:26:20,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:26:20,445 INFO L87 Difference]: Start difference. First operand 987 states and 1347 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 06:26:22,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:24,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:26,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:26:26,494 INFO L93 Difference]: Finished difference Result 1119 states and 1439 transitions. [2022-07-23 06:26:26,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:26:26,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-23 06:26:26,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:26:26,502 INFO L225 Difference]: With dead ends: 1119 [2022-07-23 06:26:26,502 INFO L226 Difference]: Without dead ends: 1119 [2022-07-23 06:26:26,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:26:26,504 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 268 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 2630 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:26:26,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 2630 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 850 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2022-07-23 06:26:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-07-23 06:26:26,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1060. [2022-07-23 06:26:26,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 635 states have (on average 1.7653543307086614) internal successors, (1121), 856 states have internal predecessors, (1121), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-07-23 06:26:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1435 transitions. [2022-07-23 06:26:26,547 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1435 transitions. Word has length 5 [2022-07-23 06:26:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:26:26,547 INFO L495 AbstractCegarLoop]: Abstraction has 1060 states and 1435 transitions. [2022-07-23 06:26:26,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 06:26:26,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1435 transitions. [2022-07-23 06:26:26,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 06:26:26,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:26:26,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:26:26,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-23 06:26:26,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:26:26,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:26:26,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:26:26,763 INFO L85 PathProgramCache]: Analyzing trace with hash -863937403, now seen corresponding path program 1 times [2022-07-23 06:26:26,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:26:26,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099655677] [2022-07-23 06:26:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:26:26,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:26:26,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:26:26,765 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:26:26,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 06:26:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:26:27,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:26:27,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:26:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:27,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:26:27,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:26:27,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099655677] [2022-07-23 06:26:27,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099655677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:26:27,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:26:27,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-23 06:26:27,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123138645] [2022-07-23 06:26:27,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:26:27,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:26:27,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:26:27,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:26:27,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:26:27,213 INFO L87 Difference]: Start difference. First operand 1060 states and 1435 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:26:28,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:26:28,391 INFO L93 Difference]: Finished difference Result 1266 states and 1522 transitions. [2022-07-23 06:26:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:26:28,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-23 06:26:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:26:28,398 INFO L225 Difference]: With dead ends: 1266 [2022-07-23 06:26:28,398 INFO L226 Difference]: Without dead ends: 1266 [2022-07-23 06:26:28,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:26:28,399 INFO L413 NwaCegarLoop]: 742 mSDtfsCounter, 660 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:26:28,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 1290 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-23 06:26:28,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2022-07-23 06:26:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1059. [2022-07-23 06:26:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 635 states have (on average 1.75748031496063) internal successors, (1116), 855 states have internal predecessors, (1116), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-07-23 06:26:28,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1430 transitions. [2022-07-23 06:26:28,448 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1430 transitions. Word has length 11 [2022-07-23 06:26:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:26:28,449 INFO L495 AbstractCegarLoop]: Abstraction has 1059 states and 1430 transitions. [2022-07-23 06:26:28,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:26:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1430 transitions. [2022-07-23 06:26:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 06:26:28,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:26:28,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:26:28,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-23 06:26:28,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:26:28,664 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:26:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:26:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash -863937402, now seen corresponding path program 1 times [2022-07-23 06:26:28,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:26:28,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985914535] [2022-07-23 06:26:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:26:28,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:26:28,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:26:28,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:26:28,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 06:26:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:26:29,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:26:29,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:26:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:29,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:26:29,128 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:26:29,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985914535] [2022-07-23 06:26:29,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985914535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:26:29,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:26:29,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:26:29,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169826058] [2022-07-23 06:26:29,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:26:29,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:26:29,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:26:29,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:26:29,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:26:29,129 INFO L87 Difference]: Start difference. First operand 1059 states and 1430 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:26:31,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:26:32,558 INFO L93 Difference]: Finished difference Result 1125 states and 1445 transitions. [2022-07-23 06:26:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:26:32,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-23 06:26:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:26:32,563 INFO L225 Difference]: With dead ends: 1125 [2022-07-23 06:26:32,563 INFO L226 Difference]: Without dead ends: 1125 [2022-07-23 06:26:32,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:26:32,564 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 268 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:26:32,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1514 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 410 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-07-23 06:26:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-07-23 06:26:32,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1062. [2022-07-23 06:26:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 638 states have (on average 1.7539184952978057) internal successors, (1119), 858 states have internal predecessors, (1119), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-07-23 06:26:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1433 transitions. [2022-07-23 06:26:32,591 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1433 transitions. Word has length 11 [2022-07-23 06:26:32,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:26:32,591 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1433 transitions. [2022-07-23 06:26:32,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:26:32,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1433 transitions. [2022-07-23 06:26:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 06:26:32,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:26:32,592 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:26:32,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-23 06:26:32,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:26:32,808 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:26:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:26:32,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2114831441, now seen corresponding path program 1 times [2022-07-23 06:26:32,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:26:32,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366843831] [2022-07-23 06:26:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:26:32,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:26:32,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:26:32,810 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:26:32,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 06:26:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:26:33,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:26:33,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:26:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:33,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:26:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:33,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:26:33,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366843831] [2022-07-23 06:26:33,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366843831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:26:33,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:26:33,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2022-07-23 06:26:33,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604804320] [2022-07-23 06:26:33,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:26:33,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:26:33,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:26:33,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:26:33,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:26:33,583 INFO L87 Difference]: Start difference. First operand 1062 states and 1433 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:26:35,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:37,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:39,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:45,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:26:45,511 INFO L93 Difference]: Finished difference Result 1335 states and 1679 transitions. [2022-07-23 06:26:45,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:26:45,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-07-23 06:26:45,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:26:45,517 INFO L225 Difference]: With dead ends: 1335 [2022-07-23 06:26:45,517 INFO L226 Difference]: Without dead ends: 1335 [2022-07-23 06:26:45,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:26:45,519 INFO L413 NwaCegarLoop]: 838 mSDtfsCounter, 863 mSDsluCounter, 2512 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 125 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:26:45,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [875 Valid, 3350 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1547 Invalid, 3 Unknown, 0 Unchecked, 11.6s Time] [2022-07-23 06:26:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2022-07-23 06:26:45,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1209. [2022-07-23 06:26:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 742 states have (on average 1.7398921832884098) internal successors, (1291), 964 states have internal predecessors, (1291), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:26:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1659 transitions. [2022-07-23 06:26:45,548 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1659 transitions. Word has length 14 [2022-07-23 06:26:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:26:45,549 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 1659 transitions. [2022-07-23 06:26:45,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:26:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1659 transitions. [2022-07-23 06:26:45,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-23 06:26:45,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:26:45,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:26:45,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-23 06:26:45,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:26:45,773 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:26:45,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:26:45,773 INFO L85 PathProgramCache]: Analyzing trace with hash -846555216, now seen corresponding path program 1 times [2022-07-23 06:26:45,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:26:45,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093484402] [2022-07-23 06:26:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:26:45,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:26:45,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:26:45,776 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:26:45,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 06:26:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:26:46,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:26:46,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:26:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:46,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:26:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:46,180 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:26:46,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093484402] [2022-07-23 06:26:46,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093484402] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:26:46,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:26:46,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-23 06:26:46,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093554754] [2022-07-23 06:26:46,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:26:46,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:26:46,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:26:46,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:26:46,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:26:46,183 INFO L87 Difference]: Start difference. First operand 1209 states and 1659 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:26:46,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:26:46,437 INFO L93 Difference]: Finished difference Result 1215 states and 1663 transitions. [2022-07-23 06:26:46,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:26:46,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-07-23 06:26:46,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:26:46,443 INFO L225 Difference]: With dead ends: 1215 [2022-07-23 06:26:46,443 INFO L226 Difference]: Without dead ends: 1215 [2022-07-23 06:26:46,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:26:46,444 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 442 mSDsluCounter, 2810 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 3595 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:26:46,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 3595 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:26:46,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-07-23 06:26:46,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1214. [2022-07-23 06:26:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 747 states have (on average 1.7336010709504686) internal successors, (1295), 969 states have internal predecessors, (1295), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:26:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1663 transitions. [2022-07-23 06:26:46,470 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1663 transitions. Word has length 19 [2022-07-23 06:26:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:26:46,470 INFO L495 AbstractCegarLoop]: Abstraction has 1214 states and 1663 transitions. [2022-07-23 06:26:46,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:26:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1663 transitions. [2022-07-23 06:26:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 06:26:46,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:26:46,471 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:26:46,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-23 06:26:46,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:26:46,686 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:26:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:26:46,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1706941254, now seen corresponding path program 2 times [2022-07-23 06:26:46,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:26:46,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097690028] [2022-07-23 06:26:46,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:26:46,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:26:46,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:26:46,688 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:26:46,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 06:26:47,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:26:47,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:26:47,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 06:26:47,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:26:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:47,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:26:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:26:48,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:26:48,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097690028] [2022-07-23 06:26:48,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097690028] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:26:48,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:26:48,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2022-07-23 06:26:48,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981000484] [2022-07-23 06:26:48,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:26:48,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 06:26:48,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:26:48,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 06:26:48,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-23 06:26:48,294 INFO L87 Difference]: Start difference. First operand 1214 states and 1663 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:26:50,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:52,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:26:54,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:06,027 INFO L93 Difference]: Finished difference Result 1341 states and 1697 transitions. [2022-07-23 06:27:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 06:27:06,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-07-23 06:27:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:06,031 INFO L225 Difference]: With dead ends: 1341 [2022-07-23 06:27:06,031 INFO L226 Difference]: Without dead ends: 1341 [2022-07-23 06:27:06,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2022-07-23 06:27:06,033 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 1112 mSDsluCounter, 4369 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 202 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 5195 SdHoareTripleChecker+Invalid, 2762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2557 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:06,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 5195 Invalid, 2762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2557 Invalid, 3 Unknown, 0 Unchecked, 16.3s Time] [2022-07-23 06:27:06,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-07-23 06:27:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1227. [2022-07-23 06:27:06,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 760 states have (on average 1.725) internal successors, (1311), 982 states have internal predecessors, (1311), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:27:06,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1679 transitions. [2022-07-23 06:27:06,058 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1679 transitions. Word has length 23 [2022-07-23 06:27:06,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:06,058 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 1679 transitions. [2022-07-23 06:27:06,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:27:06,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1679 transitions. [2022-07-23 06:27:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 06:27:06,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:06,059 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:06,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-23 06:27:06,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:27:06,274 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:27:06,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1287411312, now seen corresponding path program 2 times [2022-07-23 06:27:06,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:27:06,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760859723] [2022-07-23 06:27:06,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:27:06,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:27:06,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:27:06,277 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:27:06,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-23 06:27:06,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-23 06:27:06,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:27:06,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:27:06,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:27:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-23 06:27:06,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:27:06,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:27:06,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760859723] [2022-07-23 06:27:06,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760859723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:27:06,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:27:06,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-23 06:27:06,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153083992] [2022-07-23 06:27:06,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:27:06,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:27:06,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:27:06,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:27:06,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:27:06,775 INFO L87 Difference]: Start difference. First operand 1227 states and 1679 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:27:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:07,970 INFO L93 Difference]: Finished difference Result 1435 states and 1772 transitions. [2022-07-23 06:27:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:27:07,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-07-23 06:27:07,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:07,975 INFO L225 Difference]: With dead ends: 1435 [2022-07-23 06:27:07,975 INFO L226 Difference]: Without dead ends: 1435 [2022-07-23 06:27:07,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:27:07,976 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 646 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:07,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 1288 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-23 06:27:07,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2022-07-23 06:27:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1225. [2022-07-23 06:27:08,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 760 states have (on average 1.7131578947368422) internal successors, (1302), 980 states have internal predecessors, (1302), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:27:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1670 transitions. [2022-07-23 06:27:08,004 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1670 transitions. Word has length 31 [2022-07-23 06:27:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:08,005 INFO L495 AbstractCegarLoop]: Abstraction has 1225 states and 1670 transitions. [2022-07-23 06:27:08,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:27:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1670 transitions. [2022-07-23 06:27:08,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 06:27:08,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:08,006 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:08,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-23 06:27:08,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:27:08,223 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:27:08,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:08,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1287411313, now seen corresponding path program 1 times [2022-07-23 06:27:08,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:27:08,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126303115] [2022-07-23 06:27:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:27:08,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:27:08,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:27:08,226 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:27:08,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 06:27:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:08,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:27:08,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:27:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:08,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:27:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:08,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:27:08,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126303115] [2022-07-23 06:27:08,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126303115] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:27:08,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:27:08,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-23 06:27:08,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713403181] [2022-07-23 06:27:08,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:27:08,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 06:27:08,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:27:08,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 06:27:08,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:27:08,914 INFO L87 Difference]: Start difference. First operand 1225 states and 1670 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:27:09,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:09,453 INFO L93 Difference]: Finished difference Result 1225 states and 1666 transitions. [2022-07-23 06:27:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 06:27:09,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-07-23 06:27:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:09,458 INFO L225 Difference]: With dead ends: 1225 [2022-07-23 06:27:09,458 INFO L226 Difference]: Without dead ends: 1225 [2022-07-23 06:27:09,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-07-23 06:27:09,459 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 868 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 6249 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:09,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 6249 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 06:27:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-07-23 06:27:09,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1225. [2022-07-23 06:27:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 760 states have (on average 1.7078947368421054) internal successors, (1298), 980 states have internal predecessors, (1298), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:27:09,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1666 transitions. [2022-07-23 06:27:09,484 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1666 transitions. Word has length 31 [2022-07-23 06:27:09,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:09,484 INFO L495 AbstractCegarLoop]: Abstraction has 1225 states and 1666 transitions. [2022-07-23 06:27:09,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:27:09,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1666 transitions. [2022-07-23 06:27:09,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:27:09,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:09,485 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:09,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-23 06:27:09,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:27:09,699 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:27:09,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:09,699 INFO L85 PathProgramCache]: Analyzing trace with hash 338189670, now seen corresponding path program 3 times [2022-07-23 06:27:09,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:27:09,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154904965] [2022-07-23 06:27:09,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 06:27:09,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:27:09,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:27:09,702 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:27:09,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 06:27:10,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-23 06:27:10,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:27:10,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 06:27:10,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:27:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:11,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:27:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:13,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:27:13,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154904965] [2022-07-23 06:27:13,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154904965] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:27:13,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:27:13,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2022-07-23 06:27:13,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396809803] [2022-07-23 06:27:13,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:27:13,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 06:27:13,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:27:13,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 06:27:13,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-07-23 06:27:13,445 INFO L87 Difference]: Start difference. First operand 1225 states and 1666 transitions. Second operand has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:27:15,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:17,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:19,478 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:21,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:23,497 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:25,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:27,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:29,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:55,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:55,817 INFO L93 Difference]: Finished difference Result 1574 states and 1894 transitions. [2022-07-23 06:27:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 06:27:55,818 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-07-23 06:27:55,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:55,823 INFO L225 Difference]: With dead ends: 1574 [2022-07-23 06:27:55,823 INFO L226 Difference]: Without dead ends: 1574 [2022-07-23 06:27:55,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2022-07-23 06:27:55,824 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 2005 mSDsluCounter, 8344 mSDsCounter, 0 mSdLazyCounter, 5799 mSolverCounterSat, 226 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2017 SdHoareTripleChecker+Valid, 9096 SdHoareTripleChecker+Invalid, 6033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 5799 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:55,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2017 Valid, 9096 Invalid, 6033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 5799 Invalid, 8 Unknown, 0 Unchecked, 41.3s Time] [2022-07-23 06:27:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2022-07-23 06:27:55,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1223. [2022-07-23 06:27:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 759 states have (on average 1.7061923583662715) internal successors, (1295), 978 states have internal predecessors, (1295), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:27:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1663 transitions. [2022-07-23 06:27:55,848 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1663 transitions. Word has length 41 [2022-07-23 06:27:55,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:55,848 INFO L495 AbstractCegarLoop]: Abstraction has 1223 states and 1663 transitions. [2022-07-23 06:27:55,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:27:55,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1663 transitions. [2022-07-23 06:27:55,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 06:27:55,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:55,849 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:55,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 06:27:56,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:27:56,066 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:27:56,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:56,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1417284303, now seen corresponding path program 2 times [2022-07-23 06:27:56,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:27:56,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099547237] [2022-07-23 06:27:56,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:27:56,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:27:56,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:27:56,068 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:27:56,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 06:27:56,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-23 06:27:56,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:27:56,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:27:56,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:27:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-23 06:27:56,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:27:56,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:27:56,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099547237] [2022-07-23 06:27:56,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099547237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:27:56,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:27:56,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:27:56,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811080187] [2022-07-23 06:27:56,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:27:56,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:27:56,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:27:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:27:56,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:27:56,735 INFO L87 Difference]: Start difference. First operand 1223 states and 1663 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:27:58,760 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:27:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:59,938 INFO L93 Difference]: Finished difference Result 1279 states and 1675 transitions. [2022-07-23 06:27:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:27:59,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-07-23 06:27:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:59,943 INFO L225 Difference]: With dead ends: 1279 [2022-07-23 06:27:59,943 INFO L226 Difference]: Without dead ends: 1279 [2022-07-23 06:27:59,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:27:59,944 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 237 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:59,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 1498 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 404 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-07-23 06:27:59,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-07-23 06:27:59,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1221. [2022-07-23 06:27:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 759 states have (on average 1.7035573122529644) internal successors, (1293), 976 states have internal predecessors, (1293), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:27:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1661 transitions. [2022-07-23 06:27:59,965 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1661 transitions. Word has length 43 [2022-07-23 06:27:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:59,965 INFO L495 AbstractCegarLoop]: Abstraction has 1221 states and 1661 transitions. [2022-07-23 06:27:59,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:27:59,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1661 transitions. [2022-07-23 06:27:59,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 06:27:59,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:59,967 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:59,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-07-23 06:28:00,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:00,181 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:28:00,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:00,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1129900010, now seen corresponding path program 1 times [2022-07-23 06:28:00,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:00,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890942375] [2022-07-23 06:28:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:00,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:00,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:00,185 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:00,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 06:28:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:00,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:28:00,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:00,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-23 06:28:00,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:00,730 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:00,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890942375] [2022-07-23 06:28:00,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890942375] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:00,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:00,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:28:00,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251824718] [2022-07-23 06:28:00,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:00,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:28:00,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:28:00,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:28:00,732 INFO L87 Difference]: Start difference. First operand 1221 states and 1661 transitions. Second operand has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-23 06:28:02,753 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:03,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:03,313 INFO L93 Difference]: Finished difference Result 1220 states and 1660 transitions. [2022-07-23 06:28:03,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:28:03,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2022-07-23 06:28:03,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:03,318 INFO L225 Difference]: With dead ends: 1220 [2022-07-23 06:28:03,318 INFO L226 Difference]: Without dead ends: 1220 [2022-07-23 06:28:03,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:28:03,318 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 2 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:03,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1363 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-07-23 06:28:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-07-23 06:28:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1220. [2022-07-23 06:28:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 759 states have (on average 1.702239789196311) internal successors, (1292), 975 states have internal predecessors, (1292), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:28:03,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1660 transitions. [2022-07-23 06:28:03,352 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1660 transitions. Word has length 67 [2022-07-23 06:28:03,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:03,352 INFO L495 AbstractCegarLoop]: Abstraction has 1220 states and 1660 transitions. [2022-07-23 06:28:03,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-23 06:28:03,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1660 transitions. [2022-07-23 06:28:03,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 06:28:03,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:03,354 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:03,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:03,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:03,569 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:28:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1129900011, now seen corresponding path program 1 times [2022-07-23 06:28:03,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:03,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516719007] [2022-07-23 06:28:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:03,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:03,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:03,572 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:03,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 06:28:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:28:04,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:04,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-23 06:28:04,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:04,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:04,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516719007] [2022-07-23 06:28:04,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516719007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:04,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:04,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:28:04,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937316039] [2022-07-23 06:28:04,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:04,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:28:04,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:04,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:28:04,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:28:04,187 INFO L87 Difference]: Start difference. First operand 1220 states and 1660 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-23 06:28:06,211 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:07,061 INFO L93 Difference]: Finished difference Result 1219 states and 1658 transitions. [2022-07-23 06:28:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:28:07,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2022-07-23 06:28:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:07,065 INFO L225 Difference]: With dead ends: 1219 [2022-07-23 06:28:07,065 INFO L226 Difference]: Without dead ends: 1219 [2022-07-23 06:28:07,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:28:07,066 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 749 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:07,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 1362 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-07-23 06:28:07,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-07-23 06:28:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1219. [2022-07-23 06:28:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 759 states have (on average 1.699604743083004) internal successors, (1290), 974 states have internal predecessors, (1290), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-07-23 06:28:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1658 transitions. [2022-07-23 06:28:07,088 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1658 transitions. Word has length 67 [2022-07-23 06:28:07,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:07,088 INFO L495 AbstractCegarLoop]: Abstraction has 1219 states and 1658 transitions. [2022-07-23 06:28:07,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-23 06:28:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1658 transitions. [2022-07-23 06:28:07,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-23 06:28:07,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:07,090 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:07,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:07,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:07,308 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr164ASSERT_VIOLATIONMEMORY_LEAK === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:28:07,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:07,308 INFO L85 PathProgramCache]: Analyzing trace with hash -366255816, now seen corresponding path program 1 times [2022-07-23 06:28:07,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:07,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900998472] [2022-07-23 06:28:07,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:07,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:07,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:07,311 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:07,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 06:28:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:07,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 06:28:07,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-23 06:28:07,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:07,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:07,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900998472] [2022-07-23 06:28:07,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900998472] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:07,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:07,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:28:07,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677492078] [2022-07-23 06:28:07,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:07,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:28:07,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:07,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:28:07,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:28:07,976 INFO L87 Difference]: Start difference. First operand 1219 states and 1658 transitions. Second operand has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:28:09,992 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:10,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:10,671 INFO L93 Difference]: Finished difference Result 1260 states and 1667 transitions. [2022-07-23 06:28:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:28:10,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 74 [2022-07-23 06:28:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:10,676 INFO L225 Difference]: With dead ends: 1260 [2022-07-23 06:28:10,676 INFO L226 Difference]: Without dead ends: 1248 [2022-07-23 06:28:10,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:28:10,677 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 93 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:10,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1323 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-07-23 06:28:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-07-23 06:28:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1215. [2022-07-23 06:28:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 757 states have (on average 1.7001321003963012) internal successors, (1287), 972 states have internal predecessors, (1287), 183 states have call successors, (183), 79 states have call predecessors, (183), 78 states have return successors, (181), 174 states have call predecessors, (181), 181 states have call successors, (181) [2022-07-23 06:28:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1651 transitions. [2022-07-23 06:28:10,701 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1651 transitions. Word has length 74 [2022-07-23 06:28:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:10,702 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 1651 transitions. [2022-07-23 06:28:10,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:28:10,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1651 transitions. [2022-07-23 06:28:10,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-23 06:28:10,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:10,703 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:10,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-23 06:28:10,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:10,919 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:28:10,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:10,919 INFO L85 PathProgramCache]: Analyzing trace with hash -475870393, now seen corresponding path program 1 times [2022-07-23 06:28:10,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:10,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001734310] [2022-07-23 06:28:10,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:10,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:10,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:10,921 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:10,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-23 06:28:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:12,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:28:12,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:12,283 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:28:12,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-23 06:28:12,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:28:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-23 06:28:12,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:12,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:12,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001734310] [2022-07-23 06:28:12,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001734310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:12,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1315310472] [2022-07-23 06:28:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:12,486 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:28:12,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:28:12,489 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:28:12,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-07-23 06:28:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:13,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 06:28:13,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:14,450 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-23 06:28:14,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 39 [2022-07-23 06:28:14,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-23 06:28:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-23 06:28:14,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:14,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1315310472] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:14,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:28:14,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-23 06:28:14,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092062599] [2022-07-23 06:28:14,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:14,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:28:14,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:14,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:28:14,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:28:14,707 INFO L87 Difference]: Start difference. First operand 1215 states and 1651 transitions. Second operand has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-23 06:28:16,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:18,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:20,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:23,794 INFO L93 Difference]: Finished difference Result 1748 states and 2289 transitions. [2022-07-23 06:28:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:28:23,795 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 76 [2022-07-23 06:28:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:23,801 INFO L225 Difference]: With dead ends: 1748 [2022-07-23 06:28:23,801 INFO L226 Difference]: Without dead ends: 1748 [2022-07-23 06:28:23,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:28:23,802 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 1348 mSDsluCounter, 2902 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 156 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 3609 SdHoareTripleChecker+Invalid, 2429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:23,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1349 Valid, 3609 Invalid, 2429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2270 Invalid, 3 Unknown, 0 Unchecked, 9.0s Time] [2022-07-23 06:28:23,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2022-07-23 06:28:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1525. [2022-07-23 06:28:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 987 states have (on average 1.7294832826747721) internal successors, (1707), 1213 states have internal predecessors, (1707), 241 states have call successors, (241), 101 states have call predecessors, (241), 100 states have return successors, (239), 225 states have call predecessors, (239), 239 states have call successors, (239) [2022-07-23 06:28:23,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2187 transitions. [2022-07-23 06:28:23,831 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2187 transitions. Word has length 76 [2022-07-23 06:28:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:23,832 INFO L495 AbstractCegarLoop]: Abstraction has 1525 states and 2187 transitions. [2022-07-23 06:28:23,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-23 06:28:23,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2187 transitions. [2022-07-23 06:28:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-23 06:28:23,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:23,833 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:23,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-07-23 06:28:24,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:24,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:24,258 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:28:24,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:24,259 INFO L85 PathProgramCache]: Analyzing trace with hash -475870392, now seen corresponding path program 1 times [2022-07-23 06:28:24,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:24,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630853807] [2022-07-23 06:28:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:24,260 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:24,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:24,261 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:24,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-23 06:28:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:25,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:28:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:25,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:25,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:28:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-23 06:28:25,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:30,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:30,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630853807] [2022-07-23 06:28:30,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630853807] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:30,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [64402163] [2022-07-23 06:28:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:30,371 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:28:30,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:28:30,376 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:28:30,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-07-23 06:28:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:32,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:28:32,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:32,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:32,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:28:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-23 06:28:32,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:32,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [64402163] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:32,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:28:32,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-23 06:28:32,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043578648] [2022-07-23 06:28:32,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:32,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:28:32,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:32,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:28:32,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2022-07-23 06:28:32,778 INFO L87 Difference]: Start difference. First operand 1525 states and 2187 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:28:34,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:36,806 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:40,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:40,412 INFO L93 Difference]: Finished difference Result 1948 states and 2512 transitions. [2022-07-23 06:28:40,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:28:40,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 76 [2022-07-23 06:28:40,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:40,418 INFO L225 Difference]: With dead ends: 1948 [2022-07-23 06:28:40,419 INFO L226 Difference]: Without dead ends: 1948 [2022-07-23 06:28:40,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=50, Invalid=105, Unknown=1, NotChecked=0, Total=156 [2022-07-23 06:28:40,419 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 994 mSDsluCounter, 1688 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 2311 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:40,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 2311 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1905 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2022-07-23 06:28:40,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2022-07-23 06:28:40,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1702. [2022-07-23 06:28:40,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1122 states have (on average 1.7379679144385027) internal successors, (1950), 1344 states have internal predecessors, (1950), 268 states have call successors, (268), 116 states have call predecessors, (268), 115 states have return successors, (266), 257 states have call predecessors, (266), 266 states have call successors, (266) [2022-07-23 06:28:40,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2484 transitions. [2022-07-23 06:28:40,469 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2484 transitions. Word has length 76 [2022-07-23 06:28:40,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:40,470 INFO L495 AbstractCegarLoop]: Abstraction has 1702 states and 2484 transitions. [2022-07-23 06:28:40,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 06:28:40,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2484 transitions. [2022-07-23 06:28:40,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-23 06:28:40,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:40,471 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:40,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:40,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-23 06:28:40,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:40,885 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:28:40,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:40,886 INFO L85 PathProgramCache]: Analyzing trace with hash 862802860, now seen corresponding path program 1 times [2022-07-23 06:28:40,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:40,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466425903] [2022-07-23 06:28:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:40,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:40,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:40,888 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:40,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 06:28:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:42,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:28:42,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:42,273 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:28:42,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-23 06:28:42,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 06:28:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-07-23 06:28:42,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:42,422 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:42,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466425903] [2022-07-23 06:28:42,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466425903] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:42,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [406119889] [2022-07-23 06:28:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:42,423 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:28:42,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:28:42,424 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:28:42,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-23 06:28:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:43,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 06:28:43,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:44,196 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-23 06:28:44,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 39 [2022-07-23 06:28:44,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-07-23 06:28:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-07-23 06:28:44,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:44,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [406119889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:44,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:28:44,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-23 06:28:44,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644175322] [2022-07-23 06:28:44,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:44,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:28:44,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:44,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:28:44,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:28:44,439 INFO L87 Difference]: Start difference. First operand 1702 states and 2484 transitions. Second operand has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-23 06:28:46,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:48,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:50,477 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:52,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:28:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:55,238 INFO L93 Difference]: Finished difference Result 1877 states and 2496 transitions. [2022-07-23 06:28:55,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:28:55,239 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 82 [2022-07-23 06:28:55,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:55,246 INFO L225 Difference]: With dead ends: 1877 [2022-07-23 06:28:55,246 INFO L226 Difference]: Without dead ends: 1877 [2022-07-23 06:28:55,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:28:55,247 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 749 mSDsluCounter, 3364 mSDsCounter, 0 mSdLazyCounter, 2424 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 4071 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2424 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:55,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 4071 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2424 Invalid, 4 Unknown, 0 Unchecked, 10.7s Time] [2022-07-23 06:28:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-07-23 06:28:55,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1700. [2022-07-23 06:28:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1122 states have (on average 1.7361853832442067) internal successors, (1948), 1342 states have internal predecessors, (1948), 268 states have call successors, (268), 116 states have call predecessors, (268), 115 states have return successors, (266), 257 states have call predecessors, (266), 266 states have call successors, (266) [2022-07-23 06:28:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2482 transitions. [2022-07-23 06:28:55,277 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2482 transitions. Word has length 82 [2022-07-23 06:28:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:55,277 INFO L495 AbstractCegarLoop]: Abstraction has 1700 states and 2482 transitions. [2022-07-23 06:28:55,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-23 06:28:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2482 transitions. [2022-07-23 06:28:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-23 06:28:55,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:55,278 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:55,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:55,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:55,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:28:55,699 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:28:55,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:55,699 INFO L85 PathProgramCache]: Analyzing trace with hash 862802861, now seen corresponding path program 1 times [2022-07-23 06:28:55,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:55,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145380960] [2022-07-23 06:28:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:55,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:55,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:55,701 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:55,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 06:28:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:56,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:28:56,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:57,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:57,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:28:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-23 06:28:57,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:03,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:03,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145380960] [2022-07-23 06:29:03,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145380960] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:03,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1788591137] [2022-07-23 06:29:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:03,856 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:29:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:29:03,857 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:29:03,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-07-23 06:29:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:05,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:29:05,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:05,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:05,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:29:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-23 06:29:05,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:06,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1788591137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:06,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:29:06,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-23 06:29:06,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706700748] [2022-07-23 06:29:06,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:29:06,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:29:06,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:06,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:29:06,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2022-07-23 06:29:06,174 INFO L87 Difference]: Start difference. First operand 1700 states and 2482 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-23 06:29:08,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:10,202 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:13,638 INFO L93 Difference]: Finished difference Result 1944 states and 2508 transitions. [2022-07-23 06:29:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:29:13,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2022-07-23 06:29:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:13,645 INFO L225 Difference]: With dead ends: 1944 [2022-07-23 06:29:13,645 INFO L226 Difference]: Without dead ends: 1944 [2022-07-23 06:29:13,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=50, Invalid=105, Unknown=1, NotChecked=0, Total=156 [2022-07-23 06:29:13,646 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 983 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 2313 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:13,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 2313 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1897 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-07-23 06:29:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-07-23 06:29:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1698. [2022-07-23 06:29:13,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1122 states have (on average 1.7344028520499108) internal successors, (1946), 1340 states have internal predecessors, (1946), 268 states have call successors, (268), 116 states have call predecessors, (268), 115 states have return successors, (266), 257 states have call predecessors, (266), 266 states have call successors, (266) [2022-07-23 06:29:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2480 transitions. [2022-07-23 06:29:13,676 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2480 transitions. Word has length 82 [2022-07-23 06:29:13,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:13,676 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 2480 transitions. [2022-07-23 06:29:13,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-23 06:29:13,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2480 transitions. [2022-07-23 06:29:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-23 06:29:13,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:13,677 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:13,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:13,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:14,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:29:14,097 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr114REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:29:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:14,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1028659715, now seen corresponding path program 1 times [2022-07-23 06:29:14,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:14,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641112615] [2022-07-23 06:29:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:14,099 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:14,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:14,100 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:14,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-23 06:29:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:14,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:29:14,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-23 06:29:14,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:14,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:14,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641112615] [2022-07-23 06:29:14,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641112615] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:14,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:14,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:29:14,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099926926] [2022-07-23 06:29:14,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:14,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:29:14,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:14,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:29:14,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:29:14,673 INFO L87 Difference]: Start difference. First operand 1698 states and 2480 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-23 06:29:14,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:14,704 INFO L93 Difference]: Finished difference Result 1336 states and 1886 transitions. [2022-07-23 06:29:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:29:14,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 81 [2022-07-23 06:29:14,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:14,711 INFO L225 Difference]: With dead ends: 1336 [2022-07-23 06:29:14,712 INFO L226 Difference]: Without dead ends: 1331 [2022-07-23 06:29:14,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:29:14,712 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 3 mSDsluCounter, 2340 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3124 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:14,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3124 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:29:14,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-07-23 06:29:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1331. [2022-07-23 06:29:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 861 states have (on average 1.7375145180023228) internal successors, (1496), 1067 states have internal predecessors, (1496), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-07-23 06:29:14,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1880 transitions. [2022-07-23 06:29:14,743 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1880 transitions. Word has length 81 [2022-07-23 06:29:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:14,744 INFO L495 AbstractCegarLoop]: Abstraction has 1331 states and 1880 transitions. [2022-07-23 06:29:14,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-23 06:29:14,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1880 transitions. [2022-07-23 06:29:14,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-23 06:29:14,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:14,745 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:14,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:14,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:14,958 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:29:14,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:14,959 INFO L85 PathProgramCache]: Analyzing trace with hash 838655585, now seen corresponding path program 1 times [2022-07-23 06:29:14,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:14,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128531885] [2022-07-23 06:29:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:14,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:14,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:14,961 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:14,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 06:29:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:16,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:29:16,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:16,589 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:29:16,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-23 06:29:16,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:29:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-23 06:29:16,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:16,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:16,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128531885] [2022-07-23 06:29:16,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128531885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:16,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:16,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:29:16,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666803664] [2022-07-23 06:29:16,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:16,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:29:16,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:16,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:29:16,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:29:16,690 INFO L87 Difference]: Start difference. First operand 1331 states and 1880 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-23 06:29:18,707 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:20,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:20,185 INFO L93 Difference]: Finished difference Result 1506 states and 1892 transitions. [2022-07-23 06:29:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:29:20,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-07-23 06:29:20,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:20,190 INFO L225 Difference]: With dead ends: 1506 [2022-07-23 06:29:20,190 INFO L226 Difference]: Without dead ends: 1506 [2022-07-23 06:29:20,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:29:20,191 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 722 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:20,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1580 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 733 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-07-23 06:29:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-07-23 06:29:20,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1329. [2022-07-23 06:29:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 861 states have (on average 1.735191637630662) internal successors, (1494), 1065 states have internal predecessors, (1494), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-07-23 06:29:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1878 transitions. [2022-07-23 06:29:20,212 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1878 transitions. Word has length 88 [2022-07-23 06:29:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:20,213 INFO L495 AbstractCegarLoop]: Abstraction has 1329 states and 1878 transitions. [2022-07-23 06:29:20,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-23 06:29:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1878 transitions. [2022-07-23 06:29:20,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-23 06:29:20,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:20,214 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:20,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:20,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:20,427 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:29:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:20,428 INFO L85 PathProgramCache]: Analyzing trace with hash 838655586, now seen corresponding path program 1 times [2022-07-23 06:29:20,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:20,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260998657] [2022-07-23 06:29:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:20,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:20,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:20,432 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:20,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-23 06:29:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:21,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:29:21,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:22,448 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:29:22,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:29:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-23 06:29:22,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:22,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:22,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260998657] [2022-07-23 06:29:22,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260998657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:22,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:22,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:29:22,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111024259] [2022-07-23 06:29:22,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:22,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:29:22,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:22,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:29:22,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:29:22,633 INFO L87 Difference]: Start difference. First operand 1329 states and 1878 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-23 06:29:24,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:25,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:25,991 INFO L93 Difference]: Finished difference Result 1380 states and 1885 transitions. [2022-07-23 06:29:25,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:29:25,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 88 [2022-07-23 06:29:25,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:25,994 INFO L225 Difference]: With dead ends: 1380 [2022-07-23 06:29:25,994 INFO L226 Difference]: Without dead ends: 1380 [2022-07-23 06:29:25,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:29:25,995 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 123 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:25,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1857 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 516 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-07-23 06:29:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-07-23 06:29:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1327. [2022-07-23 06:29:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 861 states have (on average 1.7317073170731707) internal successors, (1491), 1063 states have internal predecessors, (1491), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-07-23 06:29:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1875 transitions. [2022-07-23 06:29:26,015 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1875 transitions. Word has length 88 [2022-07-23 06:29:26,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:26,015 INFO L495 AbstractCegarLoop]: Abstraction has 1327 states and 1875 transitions. [2022-07-23 06:29:26,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-23 06:29:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1875 transitions. [2022-07-23 06:29:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-23 06:29:26,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:26,017 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:26,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:26,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:26,236 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:29:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:26,236 INFO L85 PathProgramCache]: Analyzing trace with hash 228519724, now seen corresponding path program 1 times [2022-07-23 06:29:26,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:26,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008328125] [2022-07-23 06:29:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:26,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:26,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:26,238 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:26,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-23 06:29:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:27,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:29:27,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:27,816 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:29:27,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-23 06:29:27,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:29:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-23 06:29:27,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:27,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:27,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008328125] [2022-07-23 06:29:27,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008328125] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:27,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:27,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:29:27,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071869130] [2022-07-23 06:29:27,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:27,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:29:27,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:27,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:29:27,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:29:27,917 INFO L87 Difference]: Start difference. First operand 1327 states and 1875 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-23 06:29:29,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:31,942 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:33,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:33,786 INFO L93 Difference]: Finished difference Result 1502 states and 1887 transitions. [2022-07-23 06:29:33,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:29:33,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2022-07-23 06:29:33,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:33,794 INFO L225 Difference]: With dead ends: 1502 [2022-07-23 06:29:33,794 INFO L226 Difference]: Without dead ends: 1502 [2022-07-23 06:29:33,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:29:33,795 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 1081 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 59 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 2137 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:33,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 2137 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1102 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2022-07-23 06:29:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2022-07-23 06:29:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1325. [2022-07-23 06:29:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 861 states have (on average 1.7293844367015099) internal successors, (1489), 1061 states have internal predecessors, (1489), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-07-23 06:29:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1873 transitions. [2022-07-23 06:29:33,814 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1873 transitions. Word has length 89 [2022-07-23 06:29:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:33,814 INFO L495 AbstractCegarLoop]: Abstraction has 1325 states and 1873 transitions. [2022-07-23 06:29:33,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-23 06:29:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1873 transitions. [2022-07-23 06:29:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-23 06:29:33,815 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:33,816 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:33,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-23 06:29:34,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:34,032 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:29:34,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:34,032 INFO L85 PathProgramCache]: Analyzing trace with hash 228519725, now seen corresponding path program 1 times [2022-07-23 06:29:34,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:34,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723780493] [2022-07-23 06:29:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:34,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:34,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:34,034 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:34,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-23 06:29:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:35,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:29:35,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:35,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:35,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:29:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-23 06:29:36,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:38,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:38,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723780493] [2022-07-23 06:29:38,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723780493] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:38,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2075911263] [2022-07-23 06:29:38,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:38,378 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:29:38,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:29:38,380 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:29:38,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-07-23 06:29:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:40,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:29:40,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:40,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:40,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:29:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-23 06:29:41,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:41,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2075911263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:41,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:29:41,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-23 06:29:41,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676474970] [2022-07-23 06:29:41,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:29:41,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:29:41,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:41,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:29:41,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:29:41,348 INFO L87 Difference]: Start difference. First operand 1325 states and 1873 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-23 06:29:43,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:46,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:46,148 INFO L93 Difference]: Finished difference Result 1569 states and 1899 transitions. [2022-07-23 06:29:46,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:29:46,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2022-07-23 06:29:46,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:46,152 INFO L225 Difference]: With dead ends: 1569 [2022-07-23 06:29:46,152 INFO L226 Difference]: Without dead ends: 1569 [2022-07-23 06:29:46,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:29:46,152 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 1388 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 93 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1388 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:46,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1388 Valid, 1877 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1251 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-07-23 06:29:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2022-07-23 06:29:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1323. [2022-07-23 06:29:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 861 states have (on average 1.727061556329849) internal successors, (1487), 1059 states have internal predecessors, (1487), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-07-23 06:29:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1871 transitions. [2022-07-23 06:29:46,169 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1871 transitions. Word has length 89 [2022-07-23 06:29:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:46,170 INFO L495 AbstractCegarLoop]: Abstraction has 1323 states and 1871 transitions. [2022-07-23 06:29:46,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-23 06:29:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1871 transitions. [2022-07-23 06:29:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-23 06:29:46,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:46,171 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:46,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:46,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:46,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:46,591 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting cdev_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:29:46,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:46,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1317347739, now seen corresponding path program 1 times [2022-07-23 06:29:46,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:46,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494492011] [2022-07-23 06:29:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:46,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:46,593 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:46,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-23 06:29:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:47,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:29:47,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-23 06:29:47,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:47,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:47,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494492011] [2022-07-23 06:29:47,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494492011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:47,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:47,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:29:47,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839234962] [2022-07-23 06:29:47,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:47,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:29:47,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:47,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:29:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:29:47,577 INFO L87 Difference]: Start difference. First operand 1323 states and 1871 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-23 06:29:49,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:51,606 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:29:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:53,271 INFO L93 Difference]: Finished difference Result 1498 states and 1883 transitions. [2022-07-23 06:29:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:29:53,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 96 [2022-07-23 06:29:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:53,274 INFO L225 Difference]: With dead ends: 1498 [2022-07-23 06:29:53,275 INFO L226 Difference]: Without dead ends: 1498 [2022-07-23 06:29:53,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:29:53,275 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 793 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:53,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 2200 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1094 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-07-23 06:29:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-07-23 06:29:53,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1321. [2022-07-23 06:29:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 861 states have (on average 1.7247386759581882) internal successors, (1485), 1057 states have internal predecessors, (1485), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-07-23 06:29:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1869 transitions. [2022-07-23 06:29:53,292 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1869 transitions. Word has length 96 [2022-07-23 06:29:53,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:53,292 INFO L495 AbstractCegarLoop]: Abstraction has 1321 states and 1869 transitions. [2022-07-23 06:29:53,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-23 06:29:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1869 transitions. [2022-07-23 06:29:53,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-23 06:29:53,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:53,293 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:53,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:53,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:53,507 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting cdev_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-07-23 06:29:53,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:53,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1317347738, now seen corresponding path program 1 times [2022-07-23 06:29:53,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:53,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481655060] [2022-07-23 06:29:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:53,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:53,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:53,510 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:53,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-23 06:29:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:55,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 06:29:55,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:55,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:55,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:29:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-23 06:29:55,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:58,567 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:58,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481655060] [2022-07-23 06:29:58,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481655060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:58,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [409020476] [2022-07-23 06:29:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:58,568 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:29:58,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:29:58,569 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:29:58,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-07-23 06:30:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:30:00,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 06:30:00,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:30:01,274 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:30:01,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:30:01,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:30:01,748 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:30:01,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-07-23 06:30:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-23 06:30:01,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:30:02,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 06:30:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-23 06:30:03,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [409020476] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-23 06:30:03,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:30:03,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 17 [2022-07-23 06:30:03,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729908038] [2022-07-23 06:30:03,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:30:03,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 06:30:03,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:30:03,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 06:30:03,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-07-23 06:30:03,287 INFO L87 Difference]: Start difference. First operand 1321 states and 1869 transitions. Second operand has 9 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:30:05,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:30:07,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:30:09,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:30:11,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []