./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3a877d22 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/uthash-2.0.2/uthash_BER_test10-3.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 5577528c45849c92d31dcecadbfe6524610e7683d1e420d37b6f0ce59c6c59b8 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 16:44:34,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 16:44:34,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 16:44:34,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 16:44:34,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 16:44:34,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 16:44:34,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 16:44:34,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 16:44:34,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 16:44:34,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 16:44:34,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 16:44:34,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 16:44:34,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 16:44:34,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 16:44:34,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 16:44:34,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 16:44:34,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 16:44:34,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 16:44:34,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 16:44:34,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 16:44:34,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 16:44:34,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 16:44:34,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 16:44:34,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 16:44:34,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 16:44:34,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 16:44:34,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 16:44:34,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 16:44:34,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 16:44:34,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 16:44:34,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 16:44:34,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 16:44:34,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 16:44:34,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 16:44:34,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 16:44:34,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 16:44:34,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 16:44:34,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 16:44:34,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 16:44:34,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 16:44:34,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 16:44:34,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-15 16:44:34,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 16:44:34,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 16:44:34,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 16:44:34,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 16:44:34,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 16:44:34,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 16:44:34,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 16:44:34,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 16:44:34,964 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 16:44:34,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 16:44:34,965 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 16:44:34,965 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 16:44:34,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 16:44:34,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 16:44:34,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 16:44:34,966 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 16:44:34,966 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 16:44:34,966 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 16:44:34,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 16:44:34,966 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 16:44:34,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 16:44:34,967 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 16:44:34,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 16:44:34,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 16:44:34,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 16:44:34,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 16:44:34,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 16:44:34,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 16:44:34,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 16:44:34,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 16:44:34,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 16:44:34,980 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5577528c45849c92d31dcecadbfe6524610e7683d1e420d37b6f0ce59c6c59b8 [2021-12-15 16:44:35,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 16:44:35,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 16:44:35,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 16:44:35,345 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 16:44:35,345 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 16:44:35,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-3.i [2021-12-15 16:44:35,409 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347735625/04df767c83d84ae78a5f0eb4fed21ea2/FLAG4ca15105a [2021-12-15 16:44:36,025 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 16:44:36,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-3.i [2021-12-15 16:44:36,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347735625/04df767c83d84ae78a5f0eb4fed21ea2/FLAG4ca15105a [2021-12-15 16:44:36,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/347735625/04df767c83d84ae78a5f0eb4fed21ea2 [2021-12-15 16:44:36,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 16:44:36,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 16:44:36,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 16:44:36,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 16:44:36,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 16:44:36,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:44:36" (1/1) ... [2021-12-15 16:44:36,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70be8f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:36, skipping insertion in model container [2021-12-15 16:44:36,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:44:36" (1/1) ... [2021-12-15 16:44:36,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 16:44:36,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 16:44:36,820 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/uthash-2.0.2/uthash_BER_test10-3.i[33022,33035] [2021-12-15 16:44:37,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 16:44:37,026 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-15 16:44:37,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@673a383d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:37, skipping insertion in model container [2021-12-15 16:44:37,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 16:44:37,027 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-15 16:44:37,029 INFO L158 Benchmark]: Toolchain (without parser) took 677.78ms. Allocated memory is still 136.3MB. Free memory was 102.5MB in the beginning and 92.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 16:44:37,038 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 81.8MB. Free memory was 42.4MB in the beginning and 42.3MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 16:44:37,038 INFO L158 Benchmark]: CACSL2BoogieTranslator took 675.61ms. Allocated memory is still 136.3MB. Free memory was 102.2MB in the beginning and 92.5MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 16:44:37,040 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 81.8MB. Free memory was 42.4MB in the beginning and 42.3MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 675.61ms. Allocated memory is still 136.3MB. Free memory was 102.2MB in the beginning and 92.5MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-3.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 5577528c45849c92d31dcecadbfe6524610e7683d1e420d37b6f0ce59c6c59b8 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 16:44:38,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 16:44:38,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 16:44:38,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 16:44:38,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 16:44:38,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 16:44:38,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 16:44:38,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 16:44:38,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 16:44:38,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 16:44:38,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 16:44:38,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 16:44:38,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 16:44:38,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 16:44:38,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 16:44:38,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 16:44:38,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 16:44:38,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 16:44:38,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 16:44:38,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 16:44:38,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 16:44:38,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 16:44:38,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 16:44:38,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 16:44:38,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 16:44:38,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 16:44:38,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 16:44:38,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 16:44:38,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 16:44:38,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 16:44:38,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 16:44:38,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 16:44:38,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 16:44:38,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 16:44:38,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 16:44:38,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 16:44:38,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 16:44:38,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 16:44:38,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 16:44:38,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 16:44:38,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 16:44:38,720 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-15 16:44:38,738 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 16:44:38,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 16:44:38,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 16:44:38,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 16:44:38,739 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 16:44:38,739 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 16:44:38,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 16:44:38,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 16:44:38,740 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 16:44:38,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 16:44:38,741 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 16:44:38,741 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 16:44:38,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 16:44:38,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 16:44:38,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 16:44:38,742 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 16:44:38,742 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 16:44:38,742 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 16:44:38,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 16:44:38,743 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 16:44:38,743 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 16:44:38,743 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 16:44:38,743 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 16:44:38,743 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 16:44:38,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 16:44:38,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 16:44:38,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 16:44:38,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 16:44:38,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 16:44:38,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 16:44:38,744 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 16:44:38,745 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 16:44:38,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 16:44:38,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 16:44:38,745 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5577528c45849c92d31dcecadbfe6524610e7683d1e420d37b6f0ce59c6c59b8 [2021-12-15 16:44:39,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 16:44:39,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 16:44:39,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 16:44:39,063 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 16:44:39,064 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 16:44:39,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-3.i [2021-12-15 16:44:39,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9169b7e4c/117cc858b5984e46a507db1574528736/FLAGc5bb6b6ab [2021-12-15 16:44:39,619 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 16:44:39,620 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-3.i [2021-12-15 16:44:39,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9169b7e4c/117cc858b5984e46a507db1574528736/FLAGc5bb6b6ab [2021-12-15 16:44:40,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9169b7e4c/117cc858b5984e46a507db1574528736 [2021-12-15 16:44:40,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 16:44:40,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 16:44:40,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 16:44:40,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 16:44:40,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 16:44:40,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:44:40" (1/1) ... [2021-12-15 16:44:40,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf1aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:40, skipping insertion in model container [2021-12-15 16:44:40,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:44:40" (1/1) ... [2021-12-15 16:44:40,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 16:44:40,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 16:44:40,671 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/uthash-2.0.2/uthash_BER_test10-3.i[33022,33035] [2021-12-15 16:44:41,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 16:44:41,053 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-15 16:44:41,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 16:44:41,105 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/uthash-2.0.2/uthash_BER_test10-3.i[33022,33035] [2021-12-15 16:44:41,257 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 16:44:41,262 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 16:44:41,303 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/uthash-2.0.2/uthash_BER_test10-3.i[33022,33035] [2021-12-15 16:44:41,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 16:44:41,447 INFO L208 MainTranslator]: Completed translation [2021-12-15 16:44:41,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:41 WrapperNode [2021-12-15 16:44:41,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 16:44:41,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 16:44:41,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 16:44:41,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 16:44:41,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:41" (1/1) ... [2021-12-15 16:44:41,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:41" (1/1) ... [2021-12-15 16:44:41,571 INFO L137 Inliner]: procedures = 180, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2491 [2021-12-15 16:44:41,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 16:44:41,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 16:44:41,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 16:44:41,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 16:44:41,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:41" (1/1) ... [2021-12-15 16:44:41,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:41" (1/1) ... [2021-12-15 16:44:41,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:41" (1/1) ... [2021-12-15 16:44:41,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:41" (1/1) ... [2021-12-15 16:44:41,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:41" (1/1) ... [2021-12-15 16:44:41,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:41" (1/1) ... [2021-12-15 16:44:41,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:41" (1/1) ... [2021-12-15 16:44:41,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 16:44:41,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 16:44:41,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 16:44:41,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 16:44:41,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:41" (1/1) ... [2021-12-15 16:44:41,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 16:44:41,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 16:44:41,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 16:44:41,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 16:44:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-15 16:44:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-12-15 16:44:41,789 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-12-15 16:44:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-15 16:44:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-15 16:44:41,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-15 16:44:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-15 16:44:41,790 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-15 16:44:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 16:44:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 16:44:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 16:44:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 16:44:41,791 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-15 16:44:41,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 16:44:41,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 16:44:41,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-15 16:44:41,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 16:44:41,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 16:44:41,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 16:44:42,137 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 16:44:42,138 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 16:44:42,140 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 16:44:49,514 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 16:44:49,546 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 16:44:49,559 INFO L301 CfgBuilder]: Removed 168 assume(true) statements. [2021-12-15 16:44:49,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:44:49 BoogieIcfgContainer [2021-12-15 16:44:49,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 16:44:49,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 16:44:49,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 16:44:49,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 16:44:49,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 04:44:40" (1/3) ... [2021-12-15 16:44:49,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26be6ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 04:44:49, skipping insertion in model container [2021-12-15 16:44:49,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:44:41" (2/3) ... [2021-12-15 16:44:49,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26be6ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 04:44:49, skipping insertion in model container [2021-12-15 16:44:49,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:44:49" (3/3) ... [2021-12-15 16:44:49,580 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test10-3.i [2021-12-15 16:44:49,583 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 16:44:49,588 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1193 error locations. [2021-12-15 16:44:49,670 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 16:44:49,679 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 16:44:49,679 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1193 error locations. [2021-12-15 16:44:49,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 2437 states, 1232 states have (on average 2.2280844155844157) internal successors, (2745), 2423 states have internal predecessors, (2745), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-15 16:44:49,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-15 16:44:49,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:44:49,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-15 16:44:49,787 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-15 16:44:49,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:44:49,792 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2021-12-15 16:44:49,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:44:49,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583478729] [2021-12-15 16:44:49,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:44:49,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:44:49,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:44:49,807 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:44:49,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 16:44:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:44:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 16:44:50,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:44:50,097 INFO L388 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 [2021-12-15 16:44:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:44:50,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:44:50,106 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:44:50,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583478729] [2021-12-15 16:44:50,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583478729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:44:50,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:44:50,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 16:44:50,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562208613] [2021-12-15 16:44:50,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:44:50,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 16:44:50,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:44:50,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 16:44:50,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:44:50,147 INFO L87 Difference]: Start difference. First operand has 2437 states, 1232 states have (on average 2.2280844155844157) internal successors, (2745), 2423 states have internal predecessors, (2745), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:44:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:44:53,775 INFO L93 Difference]: Finished difference Result 3281 states and 3483 transitions. [2021-12-15 16:44:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 16:44:53,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-15 16:44:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:44:53,801 INFO L225 Difference]: With dead ends: 3281 [2021-12-15 16:44:53,801 INFO L226 Difference]: Without dead ends: 3279 [2021-12-15 16:44:53,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:44:53,806 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 2318 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2328 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-15 16:44:53,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2328 Valid, 2230 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-15 16:44:53,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-12-15 16:44:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2579. [2021-12-15 16:44:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 1398 states have (on average 2.067238912732475) internal successors, (2890), 2563 states have internal predecessors, (2890), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-15 16:44:53,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 2922 transitions. [2021-12-15 16:44:53,933 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 2922 transitions. Word has length 3 [2021-12-15 16:44:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:44:53,933 INFO L470 AbstractCegarLoop]: Abstraction has 2579 states and 2922 transitions. [2021-12-15 16:44:53,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:44:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 2922 transitions. [2021-12-15 16:44:53,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-15 16:44:53,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:44:53,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-15 16:44:53,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-15 16:44:54,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:44:54,143 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-15 16:44:54,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:44:54,147 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2021-12-15 16:44:54,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:44:54,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784006678] [2021-12-15 16:44:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:44:54,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:44:54,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:44:54,150 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:44:54,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-15 16:44:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:44:54,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 16:44:54,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:44:54,335 INFO L388 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 [2021-12-15 16:44:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:44:54,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:44:54,345 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:44:54,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784006678] [2021-12-15 16:44:54,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784006678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:44:54,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:44:54,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 16:44:54,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977040999] [2021-12-15 16:44:54,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:44:54,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 16:44:54,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:44:54,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 16:44:54,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:44:54,348 INFO L87 Difference]: Start difference. First operand 2579 states and 2922 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:44:59,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:44:59,084 INFO L93 Difference]: Finished difference Result 3727 states and 4170 transitions. [2021-12-15 16:44:59,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 16:44:59,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-15 16:44:59,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:44:59,096 INFO L225 Difference]: With dead ends: 3727 [2021-12-15 16:44:59,096 INFO L226 Difference]: Without dead ends: 3727 [2021-12-15 16:44:59,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:44:59,097 INFO L933 BasicCegarLoop]: 2045 mSDtfsCounter, 1240 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 3433 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-15 16:44:59,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1244 Valid, 3433 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-15 16:44:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-12-15 16:44:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3028. [2021-12-15 16:44:59,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 1845 states have (on average 2.0233062330623306) internal successors, (3733), 3009 states have internal predecessors, (3733), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-15 16:44:59,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 3771 transitions. [2021-12-15 16:44:59,160 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 3771 transitions. Word has length 3 [2021-12-15 16:44:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:44:59,160 INFO L470 AbstractCegarLoop]: Abstraction has 3028 states and 3771 transitions. [2021-12-15 16:44:59,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:44:59,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 3771 transitions. [2021-12-15 16:44:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 16:44:59,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:44:59,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 16:44:59,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-15 16:44:59,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:44:59,368 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-15 16:44:59,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:44:59,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1375609072, now seen corresponding path program 1 times [2021-12-15 16:44:59,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:44:59,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047794301] [2021-12-15 16:44:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:44:59,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:44:59,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:44:59,375 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:44:59,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-15 16:44:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:44:59,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 16:44:59,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:44:59,563 INFO L388 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 [2021-12-15 16:44:59,568 INFO L388 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 [2021-12-15 16:44:59,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 16:44:59,604 INFO L388 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 [2021-12-15 16:44:59,611 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-15 16:44:59,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-15 16:44:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:44:59,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:44:59,627 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:44:59,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047794301] [2021-12-15 16:44:59,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047794301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:44:59,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:44:59,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 16:44:59,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728465210] [2021-12-15 16:44:59,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:44:59,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 16:44:59,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:44:59,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 16:44:59,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 16:44:59,629 INFO L87 Difference]: Start difference. First operand 3028 states and 3771 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:08,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:45:08,122 INFO L93 Difference]: Finished difference Result 6006 states and 6937 transitions. [2021-12-15 16:45:08,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 16:45:08,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-15 16:45:08,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:45:08,138 INFO L225 Difference]: With dead ends: 6006 [2021-12-15 16:45:08,138 INFO L226 Difference]: Without dead ends: 6006 [2021-12-15 16:45:08,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 16:45:08,139 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 3127 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 4719 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3137 SdHoareTripleChecker+Valid, 3162 SdHoareTripleChecker+Invalid, 4747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-12-15 16:45:08,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3137 Valid, 3162 Invalid, 4747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4719 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2021-12-15 16:45:08,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6006 states. [2021-12-15 16:45:08,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6006 to 3747. [2021-12-15 16:45:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 2564 states have (on average 2.0514820592823715) internal successors, (5260), 3722 states have internal predecessors, (5260), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-15 16:45:08,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 5310 transitions. [2021-12-15 16:45:08,200 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 5310 transitions. Word has length 7 [2021-12-15 16:45:08,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:45:08,201 INFO L470 AbstractCegarLoop]: Abstraction has 3747 states and 5310 transitions. [2021-12-15 16:45:08,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:08,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 5310 transitions. [2021-12-15 16:45:08,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 16:45:08,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:45:08,202 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 16:45:08,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-15 16:45:08,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:45:08,409 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-15 16:45:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:45:08,411 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2021-12-15 16:45:08,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:45:08,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207067276] [2021-12-15 16:45:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:45:08,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:45:08,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:45:08,429 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:45:08,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-15 16:45:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:45:08,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 16:45:08,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:45:08,631 INFO L388 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 [2021-12-15 16:45:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:45:08,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:45:08,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:45:08,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207067276] [2021-12-15 16:45:08,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207067276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:45:08,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:45:08,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 16:45:08,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425645013] [2021-12-15 16:45:08,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:45:08,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 16:45:08,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:45:08,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 16:45:08,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:45:08,658 INFO L87 Difference]: Start difference. First operand 3747 states and 5310 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:45:11,375 INFO L93 Difference]: Finished difference Result 4951 states and 6827 transitions. [2021-12-15 16:45:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 16:45:11,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 16:45:11,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:45:11,392 INFO L225 Difference]: With dead ends: 4951 [2021-12-15 16:45:11,394 INFO L226 Difference]: Without dead ends: 4951 [2021-12-15 16:45:11,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:45:11,397 INFO L933 BasicCegarLoop]: 2366 mSDtfsCounter, 1998 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 3212 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 16:45:11,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2008 Valid, 3212 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 16:45:11,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-12-15 16:45:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 3656. [2021-12-15 16:45:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 2564 states have (on average 1.968408736349454) internal successors, (5047), 3631 states have internal predecessors, (5047), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-15 16:45:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 5097 transitions. [2021-12-15 16:45:11,482 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 5097 transitions. Word has length 8 [2021-12-15 16:45:11,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:45:11,486 INFO L470 AbstractCegarLoop]: Abstraction has 3656 states and 5097 transitions. [2021-12-15 16:45:11,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:11,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 5097 transitions. [2021-12-15 16:45:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 16:45:11,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:45:11,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 16:45:11,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-15 16:45:11,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:45:11,695 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-15 16:45:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:45:11,697 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2021-12-15 16:45:11,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:45:11,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455789714] [2021-12-15 16:45:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:45:11,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:45:11,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:45:11,699 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:45:11,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-15 16:45:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:45:11,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 16:45:11,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:45:11,885 INFO L388 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 [2021-12-15 16:45:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:45:11,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:45:11,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:45:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455789714] [2021-12-15 16:45:11,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455789714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:45:11,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:45:11,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 16:45:11,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256530529] [2021-12-15 16:45:11,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:45:11,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 16:45:11,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:45:11,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 16:45:11,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:45:11,907 INFO L87 Difference]: Start difference. First operand 3656 states and 5097 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:45:16,054 INFO L93 Difference]: Finished difference Result 5371 states and 7455 transitions. [2021-12-15 16:45:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 16:45:16,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 16:45:16,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:45:16,070 INFO L225 Difference]: With dead ends: 5371 [2021-12-15 16:45:16,070 INFO L226 Difference]: Without dead ends: 5371 [2021-12-15 16:45:16,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:45:16,079 INFO L933 BasicCegarLoop]: 2746 mSDtfsCounter, 1369 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 3931 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-15 16:45:16,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 3931 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1670 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-15 16:45:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2021-12-15 16:45:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 3978. [2021-12-15 16:45:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 2896 states have (on average 1.9540745856353592) internal successors, (5659), 3953 states have internal predecessors, (5659), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-15 16:45:16,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5709 transitions. [2021-12-15 16:45:16,185 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5709 transitions. Word has length 8 [2021-12-15 16:45:16,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:45:16,185 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 5709 transitions. [2021-12-15 16:45:16,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5709 transitions. [2021-12-15 16:45:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 16:45:16,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:45:16,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 16:45:16,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-15 16:45:16,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:45:16,393 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-15 16:45:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:45:16,394 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2021-12-15 16:45:16,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:45:16,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597802647] [2021-12-15 16:45:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:45:16,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:45:16,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:45:16,395 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:45:16,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-15 16:45:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:45:16,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 16:45:16,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:45:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:45:16,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:45:16,659 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:45:16,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597802647] [2021-12-15 16:45:16,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597802647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:45:16,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:45:16,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 16:45:16,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743175585] [2021-12-15 16:45:16,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:45:16,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 16:45:16,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:45:16,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 16:45:16,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:45:16,660 INFO L87 Difference]: Start difference. First operand 3978 states and 5709 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:45:16,720 INFO L93 Difference]: Finished difference Result 3918 states and 5623 transitions. [2021-12-15 16:45:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 16:45:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 16:45:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:45:16,743 INFO L225 Difference]: With dead ends: 3918 [2021-12-15 16:45:16,743 INFO L226 Difference]: Without dead ends: 3918 [2021-12-15 16:45:16,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:45:16,744 INFO L933 BasicCegarLoop]: 2407 mSDtfsCounter, 1197 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 3623 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 16:45:16,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1201 Valid, 3623 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 16:45:16,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2021-12-15 16:45:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 3918. [2021-12-15 16:45:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 2860 states have (on average 1.9486013986013986) internal successors, (5573), 3893 states have internal predecessors, (5573), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-15 16:45:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 5623 transitions. [2021-12-15 16:45:16,791 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 5623 transitions. Word has length 11 [2021-12-15 16:45:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:45:16,792 INFO L470 AbstractCegarLoop]: Abstraction has 3918 states and 5623 transitions. [2021-12-15 16:45:16,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 5623 transitions. [2021-12-15 16:45:16,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 16:45:16,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:45:16,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 16:45:16,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-15 16:45:17,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:45:17,000 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-15 16:45:17,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:45:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2021-12-15 16:45:17,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:45:17,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185803562] [2021-12-15 16:45:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:45:17,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:45:17,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:45:17,005 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:45:17,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-15 16:45:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:45:17,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 16:45:17,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:45:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:45:17,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:45:17,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:45:17,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185803562] [2021-12-15 16:45:17,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185803562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:45:17,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:45:17,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 16:45:17,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804513784] [2021-12-15 16:45:17,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:45:17,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 16:45:17,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:45:17,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 16:45:17,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 16:45:17,201 INFO L87 Difference]: Start difference. First operand 3918 states and 5623 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:45:17,288 INFO L93 Difference]: Finished difference Result 3890 states and 5567 transitions. [2021-12-15 16:45:17,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 16:45:17,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 16:45:17,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:45:17,296 INFO L225 Difference]: With dead ends: 3890 [2021-12-15 16:45:17,297 INFO L226 Difference]: Without dead ends: 3890 [2021-12-15 16:45:17,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 16:45:17,297 INFO L933 BasicCegarLoop]: 2362 mSDtfsCounter, 1168 mSDsluCounter, 3571 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 5933 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 16:45:17,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1172 Valid, 5933 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 16:45:17,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2021-12-15 16:45:17,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3888. [2021-12-15 16:45:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 2844 states have (on average 1.939170182841069) internal successors, (5515), 3863 states have internal predecessors, (5515), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-15 16:45:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 5565 transitions. [2021-12-15 16:45:17,346 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 5565 transitions. Word has length 13 [2021-12-15 16:45:17,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:45:17,347 INFO L470 AbstractCegarLoop]: Abstraction has 3888 states and 5565 transitions. [2021-12-15 16:45:17,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:17,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 5565 transitions. [2021-12-15 16:45:17,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 16:45:17,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:45:17,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 16:45:17,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-15 16:45:17,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:45:17,556 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-15 16:45:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:45:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2021-12-15 16:45:17,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:45:17,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123572941] [2021-12-15 16:45:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:45:17,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:45:17,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:45:17,558 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 16:45:17,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-15 16:45:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:45:17,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 16:45:17,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:45:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:45:17,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:45:17,785 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:45:17,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123572941] [2021-12-15 16:45:17,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123572941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:45:17,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:45:17,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 16:45:17,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088455077] [2021-12-15 16:45:17,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:45:17,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 16:45:17,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:45:17,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 16:45:17,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:45:17,788 INFO L87 Difference]: Start difference. First operand 3888 states and 5565 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:45:17,833 INFO L93 Difference]: Finished difference Result 5514 states and 7318 transitions. [2021-12-15 16:45:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 16:45:17,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-15 16:45:17,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:45:17,872 INFO L225 Difference]: With dead ends: 5514 [2021-12-15 16:45:17,872 INFO L226 Difference]: Without dead ends: 5514 [2021-12-15 16:45:17,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:45:17,873 INFO L933 BasicCegarLoop]: 4091 mSDtfsCounter, 2288 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2298 SdHoareTripleChecker+Valid, 5893 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 16:45:17,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2298 Valid, 5893 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 16:45:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5514 states. [2021-12-15 16:45:17,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5514 to 3828. [2021-12-15 16:45:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 2808 states have (on average 1.9334045584045585) internal successors, (5429), 3803 states have internal predecessors, (5429), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-15 16:45:17,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 5479 transitions. [2021-12-15 16:45:17,924 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 5479 transitions. Word has length 20 [2021-12-15 16:45:17,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:45:17,924 INFO L470 AbstractCegarLoop]: Abstraction has 3828 states and 5479 transitions. [2021-12-15 16:45:17,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 5479 transitions. [2021-12-15 16:45:17,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 16:45:17,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:45:17,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 16:45:17,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-15 16:45:18,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:45:18,135 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-15 16:45:18,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:45:18,135 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2021-12-15 16:45:18,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:45:18,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111580405] [2021-12-15 16:45:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:45:18,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:45:18,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:45:18,137 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) [2021-12-15 16:45:18,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-15 16:45:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:45:18,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 16:45:18,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:45:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:45:18,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:45:18,361 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:45:18,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111580405] [2021-12-15 16:45:18,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111580405] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:45:18,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:45:18,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 16:45:18,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620829327] [2021-12-15 16:45:18,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:45:18,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 16:45:18,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:45:18,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 16:45:18,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:45:18,369 INFO L87 Difference]: Start difference. First operand 3828 states and 5479 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:18,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:45:18,444 INFO L93 Difference]: Finished difference Result 5347 states and 7027 transitions. [2021-12-15 16:45:18,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 16:45:18,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-15 16:45:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:45:18,472 INFO L225 Difference]: With dead ends: 5347 [2021-12-15 16:45:18,472 INFO L226 Difference]: Without dead ends: 5347 [2021-12-15 16:45:18,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 16:45:18,488 INFO L933 BasicCegarLoop]: 3778 mSDtfsCounter, 2245 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2255 SdHoareTripleChecker+Valid, 5532 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 16:45:18,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2255 Valid, 5532 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 16:45:18,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5347 states. [2021-12-15 16:45:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5347 to 3696. [2021-12-15 16:45:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 2700 states have (on average 1.915185185185185) internal successors, (5171), 3671 states have internal predecessors, (5171), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-15 16:45:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 5221 transitions. [2021-12-15 16:45:18,588 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 5221 transitions. Word has length 20 [2021-12-15 16:45:18,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:45:18,589 INFO L470 AbstractCegarLoop]: Abstraction has 3696 states and 5221 transitions. [2021-12-15 16:45:18,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 5221 transitions. [2021-12-15 16:45:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 16:45:18,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:45:18,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 16:45:18,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-15 16:45:18,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:45:18,799 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-15 16:45:18,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:45:18,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2021-12-15 16:45:18,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:45:18,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388337928] [2021-12-15 16:45:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:45:18,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:45:18,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:45:18,801 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) [2021-12-15 16:45:18,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-15 16:45:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:45:19,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 16:45:19,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:45:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:45:19,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:45:19,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:45:19,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388337928] [2021-12-15 16:45:19,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388337928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:45:19,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:45:19,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 16:45:19,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858367168] [2021-12-15 16:45:19,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:45:19,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 16:45:19,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:45:19,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 16:45:19,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 16:45:19,059 INFO L87 Difference]: Start difference. First operand 3696 states and 5221 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:19,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:45:19,141 INFO L93 Difference]: Finished difference Result 5312 states and 6961 transitions. [2021-12-15 16:45:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 16:45:19,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-15 16:45:19,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:45:19,150 INFO L225 Difference]: With dead ends: 5312 [2021-12-15 16:45:19,150 INFO L226 Difference]: Without dead ends: 5312 [2021-12-15 16:45:19,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 16:45:19,151 INFO L933 BasicCegarLoop]: 3960 mSDtfsCounter, 2216 mSDsluCounter, 5712 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2226 SdHoareTripleChecker+Valid, 9672 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 16:45:19,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2226 Valid, 9672 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 16:45:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2021-12-15 16:45:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 3666. [2021-12-15 16:45:19,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 2684 states have (on average 1.9049925484351713) internal successors, (5113), 3641 states have internal predecessors, (5113), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-15 16:45:19,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 5163 transitions. [2021-12-15 16:45:19,220 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 5163 transitions. Word has length 22 [2021-12-15 16:45:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:45:19,221 INFO L470 AbstractCegarLoop]: Abstraction has 3666 states and 5163 transitions. [2021-12-15 16:45:19,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 5163 transitions. [2021-12-15 16:45:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 16:45:19,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:45:19,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 16:45:19,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-15 16:45:19,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:45:19,432 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-15 16:45:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:45:19,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2021-12-15 16:45:19,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:45:19,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703687711] [2021-12-15 16:45:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:45:19,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:45:19,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:45:19,434 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) [2021-12-15 16:45:19,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-15 16:45:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:45:19,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 16:45:19,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:45:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:45:19,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:45:19,667 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:45:19,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703687711] [2021-12-15 16:45:19,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703687711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:45:19,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:45:19,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 16:45:19,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460643267] [2021-12-15 16:45:19,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:45:19,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 16:45:19,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:45:19,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 16:45:19,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 16:45:19,669 INFO L87 Difference]: Start difference. First operand 3666 states and 5163 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:19,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 16:45:19,743 INFO L93 Difference]: Finished difference Result 5239 states and 6772 transitions. [2021-12-15 16:45:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 16:45:19,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-15 16:45:19,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 16:45:19,751 INFO L225 Difference]: With dead ends: 5239 [2021-12-15 16:45:19,751 INFO L226 Difference]: Without dead ends: 5239 [2021-12-15 16:45:19,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 16:45:19,752 INFO L933 BasicCegarLoop]: 3885 mSDtfsCounter, 2181 mSDsluCounter, 5597 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2191 SdHoareTripleChecker+Valid, 9482 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 16:45:19,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2191 Valid, 9482 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 16:45:19,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5239 states. [2021-12-15 16:45:19,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5239 to 3604. [2021-12-15 16:45:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 2636 states have (on average 1.8736722306525038) internal successors, (4939), 3579 states have internal predecessors, (4939), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-15 16:45:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 4989 transitions. [2021-12-15 16:45:19,799 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 4989 transitions. Word has length 22 [2021-12-15 16:45:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 16:45:19,800 INFO L470 AbstractCegarLoop]: Abstraction has 3604 states and 4989 transitions. [2021-12-15 16:45:19,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 4989 transitions. [2021-12-15 16:45:19,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 16:45:19,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 16:45:19,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 16:45:19,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-15 16:45:20,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:45:20,011 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1189 more)] === [2021-12-15 16:45:20,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 16:45:20,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2021-12-15 16:45:20,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 16:45:20,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743036468] [2021-12-15 16:45:20,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 16:45:20,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 16:45:20,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 16:45:20,021 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) [2021-12-15 16:45:20,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-15 16:45:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 16:45:20,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 16:45:20,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 16:45:20,217 INFO L388 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 [2021-12-15 16:45:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 16:45:20,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 16:45:20,287 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 16:45:20,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743036468] [2021-12-15 16:45:20,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743036468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 16:45:20,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 16:45:20,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 16:45:20,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601824906] [2021-12-15 16:45:20,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 16:45:20,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 16:45:20,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 16:45:20,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 16:45:20,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 16:45:20,288 INFO L87 Difference]: Start difference. First operand 3604 states and 4989 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 16:45:20,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 16:45:20,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 16:45:20,569 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 279 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 16:45:20,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 322 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 16:45:20,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-15 16:45:20,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 16:45:20,771 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructOldVarsAssignment(OldVarsAssignmentCache.java:125) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getOldVarsAssignment(OldVarsAssignmentCache.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:387) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkReturn(IncrementalHoareTripleChecker.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkReturn(ChainingHoareTripleChecker.java:486) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkReturn(ChainingHoareTripleChecker.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkReturn(CachingHoareTripleChecker.java:153) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$ReturnSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:442) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.returnSuccessors(AbstractInterpolantAutomaton.java:279) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.returnSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.returnSuccessors(TotalizeNwa.java:308) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.returnSuccessors(ComplementDeterministicNwa.java:142) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.returnSuccessors(ProductNwa.java:284) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.returnSuccessorsGivenHier(ProductNwa.java:308) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addReturnsAndSuccessors(NestedWordAutomatonReachableStates.java:1118) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:950) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 16:45:20,774 INFO L158 Benchmark]: Toolchain (without parser) took 40626.32ms. Allocated memory was 67.1MB in the beginning and 281.0MB in the end (delta: 213.9MB). Free memory was 44.8MB in the beginning and 80.3MB in the end (delta: -35.5MB). Peak memory consumption was 179.0MB. Max. memory is 16.1GB. [2021-12-15 16:45:20,774 INFO L158 Benchmark]: CDTParser took 0.69ms. Allocated memory is still 67.1MB. Free memory was 49.9MB in the beginning and 49.9MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 16:45:20,775 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1299.51ms. Allocated memory was 67.1MB in the beginning and 104.9MB in the end (delta: 37.7MB). Free memory was 44.7MB in the beginning and 73.7MB in the end (delta: -29.0MB). Peak memory consumption was 51.0MB. Max. memory is 16.1GB. [2021-12-15 16:45:20,775 INFO L158 Benchmark]: Boogie Procedure Inliner took 138.73ms. Allocated memory is still 104.9MB. Free memory was 73.7MB in the beginning and 60.6MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-15 16:45:20,775 INFO L158 Benchmark]: Boogie Preprocessor took 121.00ms. Allocated memory is still 104.9MB. Free memory was 60.6MB in the beginning and 44.4MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-12-15 16:45:20,775 INFO L158 Benchmark]: RCFGBuilder took 7855.58ms. Allocated memory was 104.9MB in the beginning and 222.3MB in the end (delta: 117.4MB). Free memory was 44.4MB in the beginning and 75.5MB in the end (delta: -31.1MB). Peak memory consumption was 85.8MB. Max. memory is 16.1GB. [2021-12-15 16:45:20,775 INFO L158 Benchmark]: TraceAbstraction took 31199.29ms. Allocated memory was 222.3MB in the beginning and 281.0MB in the end (delta: 58.7MB). Free memory was 74.4MB in the beginning and 80.3MB in the end (delta: -5.9MB). Peak memory consumption was 52.8MB. Max. memory is 16.1GB. [2021-12-15 16:45:20,776 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.69ms. Allocated memory is still 67.1MB. Free memory was 49.9MB in the beginning and 49.9MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1299.51ms. Allocated memory was 67.1MB in the beginning and 104.9MB in the end (delta: 37.7MB). Free memory was 44.7MB in the beginning and 73.7MB in the end (delta: -29.0MB). Peak memory consumption was 51.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 138.73ms. Allocated memory is still 104.9MB. Free memory was 73.7MB in the beginning and 60.6MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 121.00ms. Allocated memory is still 104.9MB. Free memory was 60.6MB in the beginning and 44.4MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * RCFGBuilder took 7855.58ms. Allocated memory was 104.9MB in the beginning and 222.3MB in the end (delta: 117.4MB). Free memory was 44.4MB in the beginning and 75.5MB in the end (delta: -31.1MB). Peak memory consumption was 85.8MB. Max. memory is 16.1GB. * TraceAbstraction took 31199.29ms. Allocated memory was 222.3MB in the beginning and 281.0MB in the end (delta: 58.7MB). Free memory was 74.4MB in the beginning and 80.3MB in the end (delta: -5.9MB). Peak memory consumption was 52.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 16:45:20,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable